Archive of Our Own

The first time Izuku comes home with a hickey on his neck and a flustered look on his face, Katsuki catches him by the arm before he can dart to his room and cover it up like he’d clearly been planning to. 

“Izuku, what the fuck?” The blond growls, tilting his son’s head to the side to get a better look. “You’re seventeen. ”

At those words, Izuku gets that defiant little look on his face that’s becoming more and more common, much to Katsuki’s chagrin. It’s hard being a single father raising an omega kid, and now that his son is in the thick of his teenage years, the man is growing more and more exhausted by the day.

“Seventeen is plenty old enough for a boyfriend!” Izuku argues, stomping his foot a bit before plastering on his pleading puppy-dog eyes. “He’s really sweet, daddy.”

“Absolutely fuckin’ not,” Katsuki says firmly. “You’re too young, and you need to focus on your grades!”

“But dad -,”

“Izuku,” Katsuki interrupts, pulling him in. “You’re doing so good in school - even better than I did. You’re at the top of your support courses and all I hear from your teachers is how smart and motivated you are. I don’t want you to lose focus, okay? Especially during your final year.”

Izuku’s shoulders slump from where his arms are wrapped around his dad’s neck, the omega up on his tippy toes to reach around the alpha’s tall pro hero form.

“I know,” Izuku sniffles gently, and Katsuki immediately feels like a shitty father, because there’s nothing he hates more than making his princess cry. “It’s just… Shindo is really nice, and he’s such a gentleman… you’d like him a lot, dad!”

Katsuki snorts, rubbing Izuku’s back soothingly. “Any prepubescent knothead of an alpha sniffing around you isn’t exactly on my buddy list.”

“He’s not like that!” Izuku whines, pulling away with a frown. “We haven’t done anything but kiss!”

“Yeah, ‘cuz him sucking on your neck like he’s trying to mark you is entirely innocent, Izuku,” Katsuki grunts. “You’re too young for a boyfriend, and that’s final. Do you understand?”

Izuku says nothing, crossing his arms and glaring at his father.

“I said, do you understand?” Katsuki repeats, raising his voice.

Izuku just turns around, stomping up the steps and throwing himself into his room, slamming the door as hard as he can behind him.

Katsuki sighs, running a hand over his face, and shoots Aizawa a quick text informing him of the situation - he trusts his ex-teacher to handle it if he sees some knothead drooling over Izuku. He’s been dreading this day for years , because of course this shit was coming. Izuku’s an attractive young omega attending UA as a support student, and the school’s secondary sex demographic is a large majority alpha.

He’d just hoped he’d be able to stave it off a little longer by keeping Izuku close, pampering him and spending time with his son - movie nights, cooking together, staying up late playing video games.

It’s been hard since Inko passed when Izuku was five, but he’s been trying his best, even when his son takes after his late wife in every way. He looks like her, acts like her, and even presented as the same secondary gender. 

Even though Izuku isn’t biologically his, Katsuki has always viewed him as his own - he started dating Inko shortly before his birth, they’d convinced the world that the elusive Dynamight had been keeping his little family a secret, and the rest is history. No one besides his own mom (and dad, before he passed a few years back) and closest friends, not even Izuku himself, knows that Katsuki’s not his biological father, and the blond plans on keeping it that way - Izuku’s mere existence isn’t super common knowledge, just a few mentions of Dynamight’s son here and there, because the limelight is nothing that anyone should be born into without their consent.

After an hour or so of dinner prep, Katsuki makes his way upstairs and gently knocks on Izuku’s door. “Dinner’s ready, sweetheart.”

The door doesn’t open for a good minute, and Katsuki is just ready to try again when the door swings open and a bundle of omega suddenly lunges into his arms, nuzzling against his chest softly.

“I’m sorry,” Izuku says, his voice shaky. “I hate when we fight.”

The tension in Katsuki’s chest melts away, and he gently scents his son, rubbing his cheek against the top of his fluffy head and leaving behind his own campfire and forest scent. “I do too, babydoll.”

They eat dinner at the table and talk about their days (Izuku pointedly not bringing up Shindo again) - the omega’s eyes light up like they always do when Katsuki talks about fighting villains. It reminds the alpha of when Izuku was a tiny little pup, eager to watch all his fights on TV.

They cuddle on the couch afterwards, and Katsuki subtly makes sure his son is well-covered in his protective alpha scent, nearly growling out loud when he thinks too hard about the asshole who’s all up in Izuku’s business. He knows firsthand that teenage alphas are just horny little shits, and he’ll do whatever he can to keep them away from his son.

*

The next few months are calm bliss for Katsuki, at least on the Izuku front - his son seems genuinely apologetic, informing him that he decided to end things with Shindo and focus completely on his studies, and Katsuki couldn’t be more proud. His son has always been a smart boy, and nothing makes him happier than coming home to see him chewing on a pencil as he mumbles about support tech.

As controlling as it may be, Katsuki knows that Izuku is doing exactly as he says because he has plenty of eyes at UA, including Kirishima, who started teaching at the school after a career-ending injury. The two of them started a joint agency together after UA, and Katsuki trusts the redhead with his life, which isn’t an exactly common thing for someone like him. The other alpha even helps him run the agency still, the saint.

And then there’s Izuku’s phone. Katsuki has the self awareness as a parent to feel a bit bad about the fact that he’d set up parental controls on Izuku’s phone that allow him to see every single message that comes in and out, but he knows that it’s for his son’s own good, and that’s all that really matters. 

Nothing has been out of the ordinary - just the green-haired boy’s daily texts with his best friend, Ochako, a handful of his other omega friends from school, uncles Shoto and Kiri, and grandma Mitsuki.

Life is pretty great in general, too. Katsuki has been ranked the annual number one hero for the eleventh time ever, beating out his friend and rival Shoto for the third year in a row after years of the top spot swapping between them. On top of that, Izuku is doing fantastic in school, and Kirishima, Sero, and Denki have even dragged him out to their favorite bar a few times to get some pussy (which is laughably easy as the top hero, but he digresses). He’s had his fair share of one night stands in the past twelve years, but never once has he felt the desire to be with someone else romantically since Inko’s passing. All that matters is his son and his career, and he’s more than happy with just that.

Ochako: Do you have the answer to number 4 on the Calculus homework? Ugh :(

Katsuki chuckles down at Ochako’s snap to Izuku, smiling widely, because if anyone knows the answer, Izuku does.

Izuku: Of course I do!! Hold on, I’ll send a pic

Katsuki happily lays back on the couch, eating some popcorn and sipping some beer as he watches a shitty horror movie until Izuku comes downstairs and joins him, the two of them laughing at how terrible it is.

Yeah, Katsuki thinks. This is all he needs.

*

His dad falls asleep on the couch, as per usual, and Izuku lets out a breath he didn’t realize he was holding as he watches the man’s chest slowly rise and fall.

It’s showtime.

Izuku tip-toes upstairs, pulling out the secret phone that Momo made him after he found out about his dad bugging his messages - the other omega has been almost too supportive of his parental rebellion, and she’d been more than happy to sneak him onto her parents’ cell plan. The couple is loaded enough not to notice, and Izuku has gained a whole world of freedom.

Me: Come pick me up, babe!❤️ My dad’s asleep

Shindo: u sure? ur dad is fuckin scary 

Me: Yeah, he sleeps like a rock!!

Izuku undresses and slips into the cropped tank and soft short shorts that Ochako had bought him in secret. The idea of his dad knowing he owns an outfit like this is enough to send a bolt of fear through his heart, but it melts away when he checks himself out in the mirror, twirling around and blushing at how good his ass looks in these shorts.

Slipping his phone into his back pocket and throwing a small backpack over his shoulder, Izuku sneaks back downstairs and carefully opens his dad’s bar, putting two bottles of his overly-expensive whisky into his bag.

His phone vibrates, and he pulls it out excitedly, careful not to jostle the glass bottles as he stands.

Shindo: im out front gorgeous. hurry up.

Izuku spares another glance at his dad sleeping peacefully on the couch, his handsome face soft in slumber. The omega feels the guilt that always comes with his (alarmingly frequent) thoughts of how good-looking his father is, but he quickly shakes it off and carefully walks towards the front door, his heart beating in excitement - tonight is the party for last-year UA students, and he wouldn’t miss it for the world, even if parties aren’t usually his cup of tea.

As Izuku is about to reach for the front door, he looks back one last time to make sure everything is in place - and promptly trips over his own feet, nearly face-planting, his bag and the bottles inside slamming against the ground and shattering with a piercing clang .

Eyes wide, Izuku lays shocked on the ground as his stomach drops in horror, his heart pounding against his chest erratically because shit, he fucked up.

“Izu?” Katsuki groans groggily, sitting up on the couch with a loud yawn. “Zuku, baby, is that you?”

Izuku whimpers, his mind fuzzy with fear as his body trembles. He’s about to be grounded until he’s fucking forty, isn’t he? Not to mention what his dad will do to Shindo -

Fuck. Shindo. 

Izuku scrambles around on the floor, desperately looking for the phone that flew out of his back pocket when he fell as his dad catches his bearings and stands from the couch with a stretch.

“The fuck is that smell, sweetheart?” The blond grumbles. “Smells… like… alcohol…”

Just then, Katsuki seems to put two and two together, flicking on the light and seeing his scantily-dressed son on the floor next to the front door, two shattered bottles of his aged bourbon making puddles on the ground.

“You better have a good fucking explanation for this,” Katsuki growls lowly, looking and smelling more angry than Izuku ever remembers. His hands are balled into fists at his sides, his shirtless abs clenched tight in the dim light, the black tribal tattoo on his shoulder moving with his muscles.

“D-daddy,” Izuku starts, patting his hands around on the ground, nausea rushing through his body because he can’t find his goddamn phone. He has to text Shindo, has to warn him, his dad will fucking kill the younger alpha - 

Katsuki steps closer, the veins in his forehead looking ready to burst. “What the fuck are you wearing, Izuku?”

“I-I’m sorry!” Izuku chokes out, curling in on himself a bit, shivering where he’s soaked with potent smelling whisky. “I-I just wanted to go to the UA party…”

“The final year UA party?” Katsuki hums dangerously. “That fucking cesspool of sex and underage drinking? What were you planning on doing there, hm?”

By the tone of his voice and the way he looks over his son’s body and the smashed bottles of alcohol, his dad is well aware of what Izuku was planning on doing tonight. Shindo promised they’d get nice and drunk, find their way to one of the empty rooms and have some fun, and Izuku has been looking forward to it for weeks - he hasn’t done anything with his boyfriend besides some intense makeout sessions whenever he found the right time to sneak out. Shindo was too scared to go further, insisting that Katsuki would hunt him down afterwards, but Izuku had finally convinced him that it would be fine.

The omega’s words get stuck in his throat, his lower lip and chin quivering as he looks up at his furious dad.

“I didn’t raise you to act like this,” Katsuki croaks, his voice slowly getting louder, clearly trying to cover his heartbreak, and Izuku’s own heart feels like it splits in two, because, fuck, he disappointed and disrespected the most important person in his life. “What the fuck were you planning on doing there, Izuku?”

“This isn’t fair!” Izuku gasps out, close to tears. “I-I just wanna be a teenager, and you won’t let me!”

Katsuki’s face twists with rage. “You want be be a fucking teenager?” He yells, voice vibrating with anger. “ Being a teenager isn’t about getting drunk and and fucking alphas at a high school party, Izuku! Being a teenager is about figuring out your future and working hard for it!”

“Just because you didn’t do anything fun until you achieved your goals doesn’t mean I can’t, dad!” Izuku shouts back, his anger taking over. “News flash, asshole, I’m not going to be a fucking perfect pro hero like you! I’m fucking quirkless !”

“You think I care about that?” Katsuki yells incredulously. “You’re my son, quirk or not! You’re all I fucking have, and if something happened to you, I’d never fuckin’ forgive myself, you hear me ?”

Izuku shakes his head, trying to wake up from this shitty nightmare where he’s fucked everything up, his shoulders shaking with hiccuped sobs.

“Who came to get you, Izuku?” Katsuki suddenly asks, his tone dangerously calm. “I know you weren’t about to walk to a house party.”

“No one,” Izuku says immediately, looking up with wet eyes. “I was gonna walk, I swear!”

“Who the fuck came to pick you up?” Katsuki repeats, eyes flashing.

“My boyfriend,” Izuku whispers shamefully, looking down at the floor. “Shindo.”

“Shindo,” Katsuki hums, voice sounding somewhat amused now. “Is Shindo outside waiting for you?”

“Don’t,” Izuku says softly, his eyes widening with horror. “Dad, don’t!”

Katsuki ignores him, yanking the door open and slamming it closed behind him, shaking the entire house, and Izuku struggles to stand in the puddle of alcohol as he scrabbles for the door, pulling it open with a gasp.

“W-wait!” Izuku cries out, watching his dad blast himself towards Shindo’s car, and the younger alpha doesn’t have time to hit the gas before the blond is punching the driver’s side window into smithereens and unlocking the door, yanking the dark-haired boy out with a murderous look on his face.

“I’m not about to beat the shit out of some pathetic little knothead whose balls haven’t even dropped,” Katsuki sneers, shoving Shindo against his own car roughly. “But if you ever so much as look his way again, I’ll rip your knot off and shove it down your throat.”

“I understand, sir, Dynamight, sir!” Shindo whines, looking ready to piss himself. “I won’t go near him again!”

“You’re a smart kid,” Katsuki chuckles, pulling his wallet out of his sweatpants and throwing a couple hundreds the little shit’s way. “Fix your window. And don’t you ever come near my little princess again.” Katsuki pushes the younger alpha back into his car none too gently. “Now get the fuck out of my sight.”

Shindo speeds off, his tires squealing as he turns the corner with the quickness and races off into the night, terrified for his life.

Izuku crosses his arms over his chest, his legs quivering as he stands on their front lawn, and he doesn’t snap out of his shocked state until his dad picks him up gently and carries him inside.

“You ruined my life!” Izuku sobs out, weakly beating his fists against the blond’s chest.

Katsuki snorts, rolling his eyes. “I’d rather you be mad at me for a few days than knocked up by that fucking loser.”

“It won’t be a few days!” Izuku promises petulantly. “A-as soon as I’m eighteen, I’m moving out and never talking to you again!”

“Okay,” Katsuki says as he walks them upstairs, not in the mood to play into his son’s childish shit that they both know isn’t true. “You only have a couple of months to wait, then. Go take a shower, and go the hell to bed. We’ll talk about this in the morning.”

Izuku immediately stomps off when he’s placed on his own feet, closing the bathroom door behind him roughly.

Heading downstairs with an exhausted sigh, Katsuki picks up the sticky (secret) phone from the floor, surprised when it turns on immediately. It’s easy to get into - Izuku uses Katsuki and Inko’s anniversary date as a PIN number for basically everything.

Katsuki’s stomach toils with anxiety as he toys with the phone, scared of what he’s about to find, but he knows he has a responsibility as a parent to snoop around.

The texts are mostly tame - a few suggestive comments from Shindo here and there, and a whole group chat about how great tonight’s party will be, but other than that… Katsuki is pleasantly surprised.

It’s not until he thumbs open Snapchat that his breath gets caught in his throat, because the last thing he was expecting to see is a photo of his son bent over naked in his bed, using one hand to spread open his tight little pussy in a v-shape, the omega looking back between his legs with a shy blush on his freckled face.

The photo had been taken tonight, ready to send. 

Katsuki quickly closes out of Snapchat, in shock, going to the phone’s camera roll and breathing a sigh of relief when he finds no other photos like that one - only a few innocent selfies.

With shaking hands, the blond opens the photo messaging app again, shame rushing through his body when his cock twitches in his sweats at the erotic sight. He’s about to hit the X button to delete the photo, gone and forgotten, but his finger hesitates.

Within the span of a few seconds, he screenshots the photo and sends it to himself, careful not to save it to his son’s Snapchat, leaving behind no evidence. He then deletes the photo and message to himself, scrolls through Izuku’s Snapchat memories to thankfully see no more nudes, and promptly snaps the phone in two. 

His own phone chiming with a received message has him feeling more than guilty, and he tosses his son’s secret phone into the garbage with a sigh.

He passes Izuku’s bathroom as he walks to his own bedroom, listening to the omega softly cry for a moment before crawling into bed, his door closing with a quiet click behind him.

*

It’s been a week, and Izuku is still avoiding his father like the plague, barely leaving his room when he’s not at school.

Shindo hasn’t even looked his way since the incident, bolting out of any room Izuku enters like a fucking coward, and Izuku can reluctantly see his dad’s point, now. Shindo is a total bitch. They should be trying to make it work. They’re almost eighteen, meaning that Izuku will be an adult and his dad won’t have the authority to be a strict asshole anymore - but Izuku knows that Shindo’s future career is more important to the young alpha than anything else, and being on the number one hero’s bad side isn’t going to do him any favors. He’s damage controlling.

The silent treatment ends up stretching on for a few more days before Izuku cracks over how heartbroken his dad looks, always inviting his son to watch movies or go out for dinner only to be ignored. Izuku knows that his dad only means well, even if he went about it the wrong way. The man is just protective over his little family, and Izuku feels horrible about making him out to be some kind of bad guy.

So, when Izuku walks into their house the following Friday night after school, he gets started on dinner and dessert, excited to surprise his dad when he gets home from being a hero.

When the front door opens a couple of hours later, Izuku greets Katsuki at the entrance with apologetic eyes, chewing his lip as he looks up at the blond sadly, hating how he’s created a rift in their relationship like this.

“I-I started dinner,” Izuku says softly, leaning up to press a kiss to his dad’s cheek. “Spicy Katsudon… our favorite!”

Katsuki’s eyes immediately soften, any bit of stress he’s been carrying today easing away. “It smells fuckin’ amazing, sweetheart.”

“I’m not as good a cook as you,” Izuku teases, sticking his tongue out a bit. “But I think you’ll be proud of this attempt.”

Katsuki laughs, reaching out to pull his son against him and tickle his neck lovingly, the younger shrieking with giggles and immediately fighting to get away, his peachy, vanilla scent playful and light.

And just like that, it’s like nothing ever happened.

*

Katsuki takes parental controls off of Izuku’s phone after they have a deep talk about expectations and responsibilities, Izuku nodding along the whole way and swearing on no more secret phones, because he knows his dad is right. He’ll have time for alphas and drinking once he’s out of school, not that he’d say that out loud. There are only two months left in his final year at UA, and he’ll be eighteen in one. It won’t be a chore to focus on his studies to make his dad happy.

They take a weekend vacation to the beach and spend the whole time dunking each other under the waves, and Katsuki even sneaks Izuku a lightweight margarita from the tiki bar, smirking when he watches his son’s face curl up with disgust.

“How were you planning on drinking bourbon, sweetness?” Katsuki teases as Izuku chases the fruity drink down with a sweet soda. 

“Don’t bring that night up,” Izuku whines, his face red. “I still feel bad about going behind your back like that…”

Katsuki sighs. “It hurt, Izuku. It really did. We’ve always been so close, so seeing a part of you that I didn’t know existed was like a slap to the face.”

Izuku looks down, his eyes wet. “ I know,” he says, biting his lip. “You’re the most important person in my life, and I don’t want that to ever change.”

“Don’t cry, babydoll,” Katsuki coos, pulling his son into his lap like old times. “You made a mistake, and you learned from it. That’s all I ask.”

The waiter arrives then and Katsuki orders for them both, knowing exactly what his son likes.

Izuku, who barely notices that he’s only wearing his frilly bikini until he feels the warmth of his father under him through the thin material, and he squirms a bit, feeling immediately guilty about the way his pussy throbs. He nearly passes out when his wiggling has him feeling the outline of his dad’s cock through his swim trunks - and, oh fuck, it’s pressed right against his pussy, big and intimidating even when it’s soft.

Izuku lets out a tiny whine, clenching his pussy hard to hold in the slick that he’s suddenly producing.

“- uku? What’s wrong?” The blond’s concerned voice brings him back to reality, and the omega scrambles out of his dad’s lap, looking flushed.

“I just, uh, really have to use the bathroom,” Izuku pants, darting for the restrooms like a madman. 

He catches his breath on the toilet seat, anxiety whirling in his gut. He’s always known that his dad is an attractive alpha, it’s a fact, but he’s always been good about fighting those thoughts whenever they pop up. He’s always been good about cleaning himself up and acting like nothing happened the morning after having a wet dream starring his own father, a regular occurrence since he hit puberty at 12.

And so, he does the same now, wiping himself clean carefully, slick having soaked through his bikini bottoms a bit, and he’s more than grateful that he’s wearing scent blockers right now.

“Okay,” he says to himself in the mirror as he washes his hands. “This is normal. Totally normal. It’s not like I’m actually attracted to him. It’s just, like, my inner omega knowing he’s a person I can be comfortable around. I would never want him… to… actually…”

The image of his father over him, thrusting his strong hips, his thick cock pumping in and out, ruining Izuku’s virgin pussy for any other alpha -

Izuku whimpers, squeezing his thighs together as his eyes water, because what the fuck is wrong with him? He’s thinking of his dad fucking him, his dad filling him up. There are supposed to be biological failsafes against this shit - being attracted to his own father is wrong, both morally and biologically! His body shouldn’t even be allowing this, so why is it that he’s been thinking of this for fucking years? 

The walk back to the table is awkward, and Izuku slides into his own seat and holds his hands in his lap, staring down at the food that just arrived.

“What’s wrong, baby?” Katsuki asks, tossing some fries into his mouth. “You look upset.”

Arousal jolts through Izuku’s abdomen at his dad calling him baby, but he just meets the blond’s eyes with a wobbly smile. “Pre-heat cramps, I think,” he lies.

“I have Tylenol back at the beach house,” Katsuki says, rumbling his chest with an alphan purr gently, trying to comfort his son. “We’ll head back after we finish eating, okay?”

“Sounds good,” Izuku says, trying to act like he didn’t just sneak off to the bathroom because his own dad made him slick through his bikini. “It really hurts, so don’t take your good ol’ time, old man.”

“Hey!” Katsuki laughs with a teasing growl. “I’ll have you know I’m still a virile young alpha.”

Izuku’s gut clenches at the word virile, imagining his dad being able to go round after round after round -

Coughing, Izuku digs into his burger with a red face, his mind racing a million miles an hour.

*

Katsuki stares at the black screen of his phone, the device laying next to him in bed as he tries to will himself to sleep.

He has to stop. He knows he does. It’s fucked up, it’s wrong, it’s the most disgusting shit he’s ever done, and as someone who prides himself in his heroic ideals, it’s beyond immoral. 

He hasn’t done it in a few days, and he needs to keep it that way. Normal porn makes him cum just fine, even if the resulting orgasm doesn’t make him feel like he’s floating on cloud nine like that picture does. 

Teeth clenched, Katsuki turns over in bed and closes his eyes, his hand wrapping around his soft cock as he thinks of faceless, soft bodies, imagines sinking into the wet cunt of his last one night stand. Sucking on a pair of perky nipples as he bounces a tight little body on his dick, pulling on soft, curly green hair as he fucks into that tight pussy from behind - 

Fuck. 

Katsuki sits up in bed, grabbing his phone before he can think twice, and thumbs into his password-protected photos, his cock immediately hardening to full mast as he takes in the sight of his son bent over like a slut, spreading himself wide.

Katsuki growls a bit like he always does when he thinks about whoever Izuku was planning on sending this to - probably that little piss stain, Shindo, but he quickly brushes the thought aside and squirts some lube into his hand, wrapping it around his throbbing cock. He hisses at the chill, but it warms up fast as he jerks his heavy dick, staring at Izuku’s glistening cunt and imagining having a taste of that virgin slick. 

It’s hard not to notice how well Izuku has filled out since he hit puberty - Katsuki finds himself staring at those thick little thighs and that perky little ass whenever he has the chance, imagining those cheeks bouncing as he hits it from behind or helps him ride reverse cowgirl. He’d never really actively thought of it until he came across that damn photo on Izuku’s secret phone, but damn, it’s like the floodgates have opened since.

And god, not to mention that fat fucking pussy. Katsuki has had to cover himself up with a blanket more times than he’d care to admit during their movie nights when Izuku bends down to grab the PlayStation controller to turn on Netflix, his leggings barely concealing his cameltoe. It’s like a Pavlovian response for the blond to get hard at the sight at this point, and so he lets his son cuddle up to him sweetly, so unaware that the older man is hard under the blanket, his mind racing with thoughts of bending his son over and shoving his face into that ass.

Katsuki would take his time eating him out, make him cum on his tongue so that he’s nice and ready to take the blond’s admittedly oversized cock. He imagines Izuku whimpering a bit as he’s stretched out for the first time, but it would turn so good for his baby once his pussy was nice and acclimated to taking his daddy’s cock. Katsuki would make sure of it. He knows his way around an omega’s body, and he doesn’t have a spotless reputation for being a generous lover for no reason - he always makes sure to leave his partners fucked out and brainless, and all the gossip mags know about it.

Fuck - he’d leave Izuku unable to be satisfied by another alpha. No little shit his son’s age would be able to do much more than jackhammer inside and leave him wanting.

“Fuuuck,” Katsuki groans, squeezing his balls before moving back up to jerk himself thoroughly, base to tip, paying special attention to his sensitive head as his imagination shifts to his baby boy on his knees in front of him, looking up with those eager-to-please eyes as he licks at him softly. Katsuki would teach him to suck his cock just the way he likes it, shit, his own personal little cumslut to train up.

Katsuki’s abdomen spasms with his orgasm as he unloads all over his own abs, stroking himself through it and groaning lowly, squeezing around his forming knot. It won’t fully expand without a tight, warm hole to lock inside, but it feels good to milk himself dry, and he lays back afterwards with a satisfied air about him, ready for a peaceful sleep.

The worst part is that every time he does this, he feels less and less guilty about it. 

Fuck.

*

“Your dad is so sexy,” Ochako whispers after Izuku closes his bedroom door. “I can’t believe my best friend’s dad is the Dynamight. He was my first childhood crush!”

Izuku clenches his teeth a bit, misplaced jealousy toiling in his mind. “God, Ocha, I don’t wanna hear about how much you want my dad’s dick.”

Ochako throws her head back with an airy laugh. “Ah, right. You probably hear that shit constantly, huh?”

More than she can imagine, Izuku thinks, because his mind has been going haywire with intrusive thoughts the past week - thoughts of his father haven’t left him alone. Images of the blond alpha bending him over, Izuku sinking to his knees to suck him off, his father between his legs, licking into his pussy, the two of them kissing passionately as they make love.

The two friends spend the night binging a popular TV show, and Izuku had been hoping it’d be a nice distraction from his thoughts, but the array of sex scenes just have him squirming uncomfortably as he imagines being fucked by his dad in every position shown. 

“Don’t tell me you’re a prude,” Ochako teases at one point, looking over to see his face pinched while the omega main character is pounded into the bed. “You need to get laid, Deku! Sex is the best. ”

She practically moans the last word, and Izuku squeezes his eyes shut and tries to imagine Shindo or one of the other popular alphas at their school fucking him like the omega in the show, but the thoughts do nothing for him but make his insides coil with disgust.

He’s fucked. 

*

Izuku’s eighteenth birthday falls on a Saturday, and Katsuki lets him invite some omega friends over for a cocktail night, the group of them laughing amongst themselves as they get wine drunk and eat popcorn, watching rom-coms and making homemade face masks.

It’s a fun night in, but Izuku is most excited when they all head out, giving him tight hugs with shouts of Happy Birthday!, leaving him alone with his dad. 

“I can’t believe you’re an adult now,” Katsuki says proudly, pulling his son in for a hug after all his little friends have left. “Stop growing so fast, sweetheart.”

“Mm, dad, I don’t think that’s how it works,” Izuku giggles against his chest. 

Katsuki smiles against his hair, pressing a soft kiss there, and Izuku shudders involuntarily. “I got you a gift.”

“I told you you didn’t have to!” Izuku whines, pulling away and grabbing his dad’s hands. 

“And what makes you think I wouldn’t get my babydoll a birthday gift for his eighteenth?” Katsuki asks, picking Izuku up princess-style and carrying him upstairs.

The gift is hidden in his dad’s closet, and Izuku gasps at the size of it - the box is huge.

“Go ahead and open it,” Katsuki prompts, looking excited himself.

Izuku takes his time unwrapping the gift, pulling open the box once all the paper is pulled off, and he squeals in delight when he sees the newest, fanciest engineering tools on the market - all the stuff he’ll need working as a hero support tech engineer.

“Dad, this had to have cost tens of thousands of dollars!” Izuku shouts, turning around with a gaping mouth. “Tell me you didn’t. Oh my god!”

“I did, and that’s not all,” Katsuki says smugly, pulling a pair of jangling keys out of his pocket, handing them over to Izuku with a grin. “Happy birthday, princess.” 

Izuku takes the keys gingerly, his mouth open in shock before he’s sprinting down the stairs, Katsuki following him fondly. 

Izuku zips over to their twelve-car garage, yanking the side door open and squealing in delight when he sees a sleek new car added to his dad’s car and motorcycle collection - and oh shit, that’s his! 

“Wanna take it for a spin?” Katsuki asks when he reaches the garage, and Izuku can’t do anything but nod happily, his heart full.

“Best. Birthday. Ever,” he says sincerely later that night, yawning before kissing his dad’s cheek good night. 

*

It all comes to a head a month before Izuku graduates. He’s been working hard to keep his thoughts at bay, trying to replace any images of his dad fucking him with anyone else - sexy pro heroes, classmates, even uncle Kiri and uncle Shoto because even that is a lot less fucky than what he’s currently dealing with.

But he can’t help it - his sex drive has been killer lately, and even if he manages to almost finish himself off to the thought of another alpha, his mind always flips to his father as soon as he orgasms, and he ends up a boneless mess on his bed, spasming around his little fingers as he milks them, shamefully imagining they’re his dad’s cock.

“I’m going out to the corner store real quick,” Katsuki calls out , grabbing his keys from the counter as Izuku watches a movie in the living room.

“K, dad!” Izuku yells back, blowing air between his lips in boredom when the movie ends. 

He drags his feet into the kitchen to grab a snack, snatching his phone from the counter as he passes it and immediately looking down in confusion, because that’s totally not his phone.

Izuku rolls his eyes when he realizes his dad accidentally took his phone and left his own when he left the house, and then his stomach flutters with excitement and guilt, because his dad is gone. Which means he can look through his phone. Fuck, what if there are pictures of his dick on there?

Izuku unlocks the phone with his own birthday as the pin, opening the gallery with shaky fingers and scrolling through the photos, excited, only for it to turn into disappointment quickly when he finds nothing besides random photos of the sunset, him, and a few of his dad’s friends.

“It was worth a shot,” Izuku huffs, backing out of the camera roll reluctantly. He’s about to turn the phone off and place it carefully back where he found it when his eye catches a blurred out album titled private .

Bingo.

Pulse racing, Izuku clicks on the thumbnail, breathing out a shaky sigh when it asks for another pin. He tries a handful of numbers that come to mind - his birthday again, his parents’ anniversary, grandma Mitsuki’s birthday, his grandparent’s anniversary.

Nothing works. His shoulders fall in disappointment, and then it hits him - the day his dad started his hero career.

Izuku punches in the numbers carefully, crossing his fingers in anticipation, and he nearly screams when it works, rows of photos popping onto the screen. 

And, oh fuck, Izuku wasn’t prepared. At all. He’d been expecting a shitty photo or two of his dad’s cock, maybe some nudes the man had received from past lovers, but no. Let it be known that his dad is amazing at taking dick pics. There aren’t a ton, maybe six or so, but they’re all fucking perfect, and Izuku immediately feels himself slicking up. His dad’s cock is thick and long, even bigger than he imagined (and that’s saying a lot - those gossip articles are detailed). There’s a photo of him in front of the full-length mirror in his agency’s locker room, his body looking like a Greek god’s as he stands there, completely nude, one of his big hands wrapped around the base of his proud dick as his balls hang heavy and full below, the dark tattoo on his shoulder popping in the lighting.

Izuku rubs his thighs together, uncomfortably turned on as he scrolls through each photo individually, taking in the little details of every single one, dedicating them to memory. 

He’s down to the second to last picture, his underwear soaked through as he looks with eager eyes - and then his heart nearly stops as he scrolls to the last photo, because this one isn’t like the rest.

This one is of him.

Izuku whimpers, remembering taking this photo that night. He hadn’t planned on sending it to anyone, he’d just snapped it to see what he would look like from behind like that, but it had been left on his screen as he decided if he wanted to save it or not.

And then his dad went downstairs and picked up his phone. 

Izuku knows his dad had snapped the phone in two, had seen the remnants in the trash can, but now it’s clear that he went through it before doing so.

And he sent this photo to himself and kept it saved in his phone.

Izuku’s heart pounds against his chest.

Why?

His pussy pulses with arousal in his panties, his mind immediately racing to the thought of his dad stroking his cock to this photo of him, wanting him just as much as Izuku wants him.

But that can’t be it, right? Maybe his dad has it saved for some other reason, right? But even Izuku’s racing mind can’t come up with any other reasonable explanations.

Izuku closes out of the apps he opened and locks the phone with a deep breath, placing it exactly where he found it before laying back down on the couch, starting up another movie as mental images of his dad’s cock dance in his mind - his dad using the picture of Izuku’s virgin pussy to get off, his strong hands stroking his shaft and imagining he’s inside his son.

Izuku shivers with arousal just as his dad returns from the store, the man walking in with a dopey grin on his face.

“I accidentally took your phone, Izu,” the blond chuckles, waving it around in the air. “Must’ve gotten ‘em mixed up.”

Izuku giggles. “I didn’t even notice, daddy.” He mentally applauds himself for his acting skills as he turns back to the TV, pretending he’s enthralled with whatever bullshit is playing.

But there’s not one cell in his brain paying attention to the screen - all he’s focused on are thoughts of his dad above him, inside him.

He’s royally screwed.

*

Izuku looks at himself in his bathroom mirror, chewing on his lip. This outfit isn’t the most daring, he’s worn stuff like this in front of his dad before, but this is the first time he’ll be wearing a cute crop top and leggings since he found that photo on the alpha’s phone.

Izuku checks out his own ass, bending over a bit to make sure his lace panties are visible through the stretchy, thin material of the leggings. The top is a flowy tank top that he’d cropped himself, and he made sure to put a cute polka dot bandeau underneath for that extra touch.

He texts his dad, innocently asking when he’ll be home from his agency, and gets a nonchalant reply about heading home soon.

Izuku prances down the stairs and sets his plan into motion, pulling ingredients from the fridge and turning some music on, swaying his hips to the rhythm as he chops and spices.

He’s lost in the movement of his body and the loud music when a solid body presses up behind him, and he lets out a purr of delight as his dad presses a soft kiss to his cheek - it feels like they’re lovers, and his abdomen clenches with arousal.

“What’re you making, princess?” The blond asks as he turns the music down, his voice low as he bends down to rest his head on his son’s shoulder.  “It smells amazing.”

“Nikujaba,” Izuku sings, minutely grinding his hips back, just enough so the alpha won’t notice that it’s intentional, inwardly groaning when his dad immediately pulls away at the contact.

“Do you need any help?” Katsuki asks, coughing a bit. “I have a Zoom call with my PR team in a few minutes, but I can rush it?”

“It’s okay, daddy,” Izuku says, turning to give him a slow kiss on the cheek, hooking his arms sweetly around the blond’s broad shoulders.  “Take your time, dinner will be ready when you’re done.”

Katsuki’s eyes soften as Izuku runs his thumb gently along his dad’s cheek, and the alpha’s big hands come down to rest on his waist, on the exposed skin between his crop top and the high waisted leggings.

“What’s with you spoiling me lately, huh?” Katsuki teases softly, rubbing a rough thumb along his son’s smooth skin. “My baby boy is taking care of me more than I’m taking care of him.”

“You deserve it, daddy,” Izuku says sincerely, blushing. “You’re such a great hero, so strong. You deserve to come home to a warm dinner.”

Katsuki’s breath hitches, and Izuku swears his dad’s grip on his waist tightens before he pulls away completely, looking flustered, and Izuku can’t help but feel disappointed at the loss of warmth, even though he knows this whole process will require baby steps.

“I’ll be back down in an hour or so,” Katsuki promises, and Izuku nods, trying to swallow down his disappointment.

*

Izuku steps up his game a bit in the following days, going as far as to ask his dad to put lotion on his back as he lays out next to their pool in a skimpy bikini, wiggling his ass in a way he hopes is innocent-looking.

It ends with the two of them getting into a sunblock war, both of their bodies covered in gobs of white lotion, laughing as they fall into the pool and splash each other petulantly, so Izuku doesn’t chalk it up as the greatest success. But still - he ends up with his legs wrapped around his dad’s waist as the blond walks them around the pool, Izuku squeaking and clutching at broad shoulders when the alpha tries to dunk him. 

Izuku huffs, flicking some water in his dad’s face. “I don’t wanna get my hair wet, dad.”

Katsuki promptly dips them both under the water, chuckling at Izuku’s petulant face when they surface, and the older man presses a kiss to the omega’s forehead in a half-assed apology, trailing his lips down his cheek and to his neck in a line of kisses that leave Izuku giggling and squirming to get away.

“This has always been your ticklish spot,” Katsuki snorts, brushing his lips over the side of Izuku’s sensitive neck. 

“Yeah, so don’t tease!” Izuku whines, but both of them know he’s enjoying it, laughing and shrieking in delight as Katsuki’s lips drag across his skin. “Daddy!”

It’s like a flip is switched when all of sudden, Katsuki’s tongue comes out to play, and Izuku stiffens up when the wet muscle licks along his ticklish spot, slow and warm, lighting his nerves up like fireworks.

“O-oh,” Izuku moans lightly, melting against the blond, boneless as his dad kisses and licks his neck like an alpha would their omega. It feels good, too good, and he tilts his neck to give the blond full access, the man taking full advantage immediately - pressing his lips to his scent gland and sucking, tongue laving him with attention as he kisses a light hickey into his skin. 

Izuku nearly gets whiplash from how fast the kisses suddenly stop, and Katsuki is placing him on his own two feet in the pool, stepping away like he’s been burnt, a horrified look on his face. 

“Fuck, I’m sorry Izu,” he says, running his hand over his mouth anxiously. “Shit, baby, I shouldn’t have done that.”

Izuku’s heart drops. “I-it’s okay, really, I -,”

I liked it. I want more.

“It’s not okay,” Katsuki groans, running a hand through his hair. “I’m your fucking dad, Zuku, it’s not okay.”

Izuku nearly whines when his dad trudges out of the pool and wraps a towel around himself, shame burning on his face, refusing to even look at Izuku.

The omega scrambles to follow him out of the water, grabbing his own towel to dry himself off, chewing his lip and watching his dad open the sliding glass door to slip into his bedroom, a guilty look thrown Izuku’s way before the door closes with a gentle click. 

Sitting at their lounge table for a good half an hour, Izuku’s anger steadily rises as he contemplates his next move. Even though the clearly mutual attraction between the two of them may be fucked up, taboo, they’re both adults now, and Izuku just wishes his dad would give in and enjoy himself.

The blond practically ignores him for the rest of the night, and Izuku knows it’s because he’s ashamed of what he did. Dinner is awkward, and the alpha retreats to his bedroom much earlier than he usually does, leaving Izuku sitting on the couch alone, watching a shitty romantic comedy and wishing his dad was here to make fun of it with him.

*

The next week is painfully out of character for both of them - his dad makes small talk when he gets home from his agency, the two of them talking about boring shit like the weather and world news as they sit at the dinner table. Kirishima and Shoto come over on Friday night to drink and play card games, and Izuku tries to ignore the coil of jealousy in his gut when his dad seems to spring back to his old self in the company of his friends.

Izuku tries to insert himself into their ‘guy time’ as much as he can, dressed in a lewdly short little sundress and collecting their used dishes, making sure to sway his hips as he walks to the kitchen, feeling his dad’s burning gaze on his ass - but that’s probably just wishful thinking, if he’s honest.

“Something wrong, Zuzu?” Kirishima asks as Izuku hovers near the door, watching Shoto throw down a stack of cards with a smug, cool look. “You look like someone kicked your grandma Mitsuki.”

Izuku plasters on a fake smile, inwardly frowning at the way his dad’s eyes crinkle in laughter at Kirishima’s comment. “I’m good, uncle Kiri! Just nervous about starting college in a couple months…”

Not to mention the fact that he’s dealing with the increased desire to stay home with his dad, do college online - because the idea of being away from the blond has his inner omega whimpering pitifully. 

That, and the idea of college life has never really appealed to him, save for the few times he tried to convince himself that he had to get away from his dad and his fucked up attraction to the alpha.

“Mm,” Kirishima hums with a nod, and Izuku squeaks when a strong arm wraps around his waist, his dad pulling him into his lap as he deals cards to Kiri and Shoto.

“My baby’s gonna finish top of every class,” Katsuki says, cocksure, the sweet smell of beer on his breath as he runs a soothing hand along Izuku’s back, and the omega shivers in delight at the touch after being ignored by the man for days. “There’s no need to be nervous.”

Izuku’s face grows hot at the feeling of being in his dad’s lap after a week of the blond skirting around him at every opportunity, and he can’t help but subtly grind down, not hard enough for anyone but him and his dad to notice. The alpha’s cock twitches, his body growing tense as Izuku shallowly grinds back and forth on his lap as they start their game.

The deck is dimly lit as the sun begins to dip below the horizon, the bonfire burning bright as night bugs begin to chirp, and Katsuki uses the opportunity to reach under the table and squeeze Izuku’s thigh, taking a swig of his beer with his free hand.

“What are you doing?” Katsuki murmurs into his son’s ear as Kiri and Shoto chat about their patrols. “You don’t know what you want, Izuku.”

“Yes I do,” Izuku immediately responds, his voice quiet and sweet. “I think I know what you want, too, daddy.”

Katsuki’s breath hitches, his hands twitching where they’ve moved to rest on Izuku’s hips, the little omega sweetly grinding his hips on his lap in tight little circles, feeling the way his dad’s cock hardens and throbs in his sweatpants, and Izuku feels it against his pussy, the only barriers being those damn pants and his thin panties under his sundress.

Arching his back and leaning into the table, Izuku perfectly presents himself as intently listening to his uncles’ conversation even though it’s the very last thing on his mind as he humps down on the solid shaft of his dad’s cock, using it to stimulate his clit, leaving his panties feeling slimy with slick as his pussy leaks with arousal.

All it would take is pulling down those sweats - Izuku’s pretty sure his dad is going commando - and sinking onto that massive length. His pussy would welcome it in like it belongs there, slick easing the way as that virile cock pushes into his virgin hole. 

It’s so fucking wrong, but the taboo factor just makes Izuku’s pussy spasm harder, hot slick drooling into his little panties as his whole body begs for his daddy. He’s accepted the fact that he must be broken, because there’s no way in hell his body should be responding to his biological father like this, but he can’t bring himself to care at the moment - turned on even more by how the blond chats with his friends normally, like his son isn’t rubbing himself on his cock below the table. 

“I think I’m gonna head out,” Shoto says a while later when their game wraps up, his voice tired as he yanks both Izuku and Katsuki out of their heated moment. 

Kiri nods and stands with a yawn of ‘same’, grinning sunnily and wrapping his arms around both Izuku and Katsuki, luckily allowing the blond to remain sitting, hiding his throbbing erection beneath his son.

“See ya in the morning, Kats!” The redhead yells, and just like that, it’s just the two of them in their backyard as the night goes dark, fire crackling in the pit and reflecting in the calm pool water.

“I’m your dad, Izuku,” Katsuki says lowly, and Izuku relaxes, letting all the aroused omega scent he was holding in out into the air, his eyes hooded as he turns around in his dad’s lap, facing him, spreading his legs open around his hips.

The scent of his slick pussy hits Katsuki’s nose like a freight train, and his eyes trail down to see a dark patch of slick staining the front of Izuku’s light pink panties, the omega holding his dress up to give the blond a perfect view.

Izuku grabs one of Katsuki’s big, veiny hands, guiding his fingers to run along the soaked slit through the cotton, whining when his dad continues touching him at his own accord when he lets go of his wrist.

Katsuki’s fingers ghost along his pussy, growing more demanding with every pass until his middle finger is rubbing his clit through the material of his panties, groaning when he feels his son shudder at the feeling.

Taking a slow breath, Katsuki pulls Izuku’s panties aside, giving him a breathtaking view of the young omega’s pussy, bald and fat and oh so perfect. Slick clings to the plump lips and the insides of those amazing thighs, and Katsuki presses his fingers to the bare cunt, groaning at the warmth of it against his digits. 

He rubs the slit and sensitive clit with the tips of his fingers, wet noises coming from the joining. His fingertips are soaked in slick within an instant, and he gently pushes one against Izuku’s fluttering hole, the omega whimpering and looking down at the thick finger ready to sink into his pussy.

“Daddy,” Izuku whispers, looking into hooded red eyes, their faces barely an inch from one another, both sets of eyes fluttering closed as they push forward and meet in the middle, lips pressing together in the exact way the romance novels describe, a jolt of electricity running through their bodies as Izuku’s plump, slick lips meet Katsuki’s beer-sweet, dominating ones.

It’s messy and achingly romantic at the same time, Katsuki’s tongue pressing into his son’s mouth, swallowing down every moan and whine the omega gives him. Izuku runs his tongue along Katsuki’s bottom lip, tasting alcohol and mint toothpaste and pure alpha, leaving his inner omega vibrating with delight.

Izuku, thoroughly turned on and relaxed, only moans when his dad’s thick finger sinks into his warm, tight pussy, the walls rhythmically clenching and relaxing around the digit as it begins to slowly thrust and twist in and out.

It’s noisy, it’s wet, it’s messy, and Katsuki’s knuckles are covered in slick within seconds as he fingers his baby boy open, a second finger slipping in to stretch him out nice and good. Izuku whimpers at the fullness, but he wills himself to relax as his dad’s thumb swipes at his clit, fucking him open on his middle and ring fingers as his thumb thoroughly works him over.

“Cum on daddy’s fingers,” Katsuki says, voice low, dominating and sweet. “Clench that tight little fuckhole on my fingers, baby.”

Izuku pants heavily, and he’s flipped around in his dad’s lap, back to chest, Katsuki’s lips immediately pressing hot kisses to his neck as he continues to piston his fingers in and out, dragging slick out with every pass, effectively ruining his sweatpants.

Izuku’s pussy begins to pulse with an impending orgasm, his tight hole massaging Katsuki’s fingers, begging for a thick knot to press inside so his cunt can lock around it and work out every bit of cum until it’s deep in his womb.

But that’s not going to happen, not yet, so he throws his head back on his dad’s shoulder, wailing wantonly into the night as he squirts all over, soaking the blond’s sweatpants as he’s worked through it, those big fingers stroking his clit furiously as he gasps for air.

Katsuki pulls his fingers out with a wet schlick, and Izuku watches with hooded eyes as his father brings his soak-slicked digits to his own lips, pressing them into his mouth and licking them clean like it’s the most delectable thing he’s ever tasted. The alpha groans at the taste, his chest rumbling in approval and his eyes sharpening with lust.

Izuku can’t take it anymore - he needs more. He needs to see the elusive cock that’s been keeping him up for weeks , hot and bothered in bed thinking about it stretching him open, fucking into him like he’s nothing more than a hole.

And so he crawls out of the blond’s lap and plops down on his knees between his spread legs, right there on their veranda, their tall white fences blocking any prying eyes - it’s just the two of them in their own little fucked up world, and they wouldn’t have it any other way.

Katsuki throws him a pillow for his knees and lifts his hips from the cushioned seat just a fraction, letting Izuku roll his sweats down enough for his angry cock to spring free, thick and long and intimidating as it bobs in the open air, rock hard and begging for attention. A trimmed patch of blond pubic hair is nestled at the base, a perfectly cut v-line accentuating the length.

“So big,” Izuku purrs, shyly wrapping his hand around the shaft and swallowing down a fresh wave of saliva when his fingers don’t even touch around it. “So big, daddy.”

The scents of clean soap, sweat, and alpha hits him as he leans in, and he settles his hand at the base, palm resting on the blond’s full balls as he swipes his tongue out to lick at the leaking cockhead, shy little kitten licks that have Katsuki’s jaw clenching in arousal.

Encouraged, Izuku swirls his tongue around the crown like he’s eating an ice cream cone, moaning obscenely at the taste of pre-cum and the addictive, powerful scent of fire and caramel, pure alpha, his eyes fluttering closed as he draws the head into his wet mouth and sucks lightly. He bobs up and down on the tip to start, running his tongue along the bottom with every pass.

“That’s it,” Katsuki groans, gently resting his hand in Izuku’s soft hair, not pushing or demanding, but gently guiding every bob of his head until another few inches find their way into the omega’s slick mouth, pressing into his throat. “Wrap your tongue around the head when you come up, yeah, like that.”

Izuku’s chin is soaked with saliva, his first blowjob messy and disorganized, but he’s doing so well - keeping his teeth nice and tucked away, fighting down his gag reflex as his dad’s cock begins to slide into his throat, his big, beautiful eyes watery and innocent as he looks up at his father for approval.

“Such a good boy,” Katsuki praises, squeezing his hand in Izuku’s hair, tugging just enough for a bit of pain. “Such a good little slut for daddy.” 

Izuku’s eyes shine at the praise, and he gets a little ahead of himself in his eagerness to please, pressing down to the base and causing his throat to spasm around the intrusion desperately, gagging just a bit before pulling off with a gasp, thick strands of saliva connecting his swollen lips to the head and shaft.

He’s only off for a second before he’s going in for more, desperately fucking his own throat, palming the blond’s balls, gently cupping them as his throat massages and worships the length. He desperately hopes this isn’t some sort of sick, twisted dream that he’ll wake up for any moment, because he’s not sure his heart could take it.

He wants more, so much more, and he can’t help but spread his legs from where he’s obediently sat on his knees between the alpha’s thighs, reaching down to play with himself as he sucks his own father off. His clit is hypersensitive, his pussy soaked and desperate from how aroused he is. He rubs his little bundle of nerves as he swallows down another shallow thrust of Katsuki’s hips, his lips kissing the slowly forming knot at the base.

Katsuki, on the other hand, desperately holds himself back as he watches his son with hooded eyes, his lips parted with low groans and growls as the omega sucks him perfectly. He’s such a fast learner, picking up exactly how the blond likes it, running his tongue along the throbbing vein of his cock like a good little slut.

He doesn’t want to cum yet, the small tendril of shame brewing in his belly easily overshadowed by the arousal there as he watches his adopted son bob on his cock like he was made for it, the omega not even aware that the cock he’s slobbering around isn’t the one that made him. With that thought, the blond’s fingers tighten in green hair, his cock throbbing as his knot begins to balloon, and he’s never wanted anyone more than he does right now - no one night stand, lover, or hookup has ever compared.

Katsuki doesn’t even have time to warn his son before the supernova of an orgasm hits him like a train, stars bursting behind his eyelids as his knot inflates, and Izuku, darling Izuku, just presses down more desperately, letting the huge knot lock in his mouth, jaw stretched to its absolute limit as he massages his dad’s balls gently. Torrents of seed pump down his throat, and Katsuki has never cum so hard in his life, his whole body feeling like it’s floating as Izuku swallows it all down with soft moans. 

Once the dust settles, Katsuki slumps back in his chair, catching his breath as the reality of the situation dawns on him, horror filling his entire body - what the fuck has he done? The one person he was supposed to protect, to nurture, to raise, is between his legs, lips stretched wide open on his knot as he stares up at him with those loving, soft green eyes.

Katsuki says nothing as they wait for his knot to deflate, but he runs his hand soothingly through thick green hair, listening to the content purrs rumbling deep in his throat as Izuku rests his head against his thigh, his eyes fluttering closed blissfully.

A lewd string of cum and saliva drools from Izuku’s mouth once he can pull off, the rest of the load swallowed down obediently. Katsuki’s stomach clenches with shame as his cock gives a valiant twitch at the sight, Izuku looking entirely debauched beneath him - hair messy, lips swollen and slick, legs spread to reveal his soaked panties beneath his cute dress.

“We can’t do that again,” Katsuki says, deciding to rip the bandaid off as soon as possible. His voice is low, ashamed and heartbroken. “I’m a horrible person, I - I shouldn’t have let this happen. I’m so fucking sorry, baby.”

Izuku’s face twists in disbelief and then anger as he looks up at him from where he’s splayed on the ground, his knees red. It happens in a blur - the omega scrambles to his feet, pulling his dress down with a blush, before promptly smacking Katsuki across the face, stomping over the sliding glass door and pulling it open roughly.

“And here I thought I could be happy for once,” Izuku says, his voice watery with emotion. “You know? I thought maybe you’d figured out that we’re both adults. That we both want this.”

“Izu…” Katsuki groans, tucking his softening cock back into his sweats shamefully, pulling them up around his hips.

“Don’t Izu me, dad,” Izuku growls. “Y’know, I love you. And it might be wrong to love you the way I do, but I do. And I can’t help that. I can’t help the fact that my omega chose you, despite the fact that it’s supposed to be against nature, or something. Apparently I didn’t get the memo.”

Izuku’s eyes are getting puffy as he crosses his arms in front of him insecurely, his legs shaking with anxiety as he waits for Katsuki to respond. And the blond - he can’t take it anymore. He can’t.

“I’m not your father, Izuku,” Katsuki says, the words sounding much too loud in their space. It’s like the rest of the world stops as the truth is put out there, even the insects singing dying down just a bit, the noise of cars in the distance not mattering anymore. 

Izuku stills, looking up with this innocent look on his face, and Katsuki’s heart breaks at the molecular level. 

“What?” His voice is so small, so young.

“I met your mother when she was a few months pregnant,” Katsuki says, running a hand through his hair. “We decided to tell the world that you were mine, put my name on the birth certificate, all that. And then - everything happened. And that left you with me, and you’re my son.”

Izuku stands there, his brain catching up. “I thought I was broken,” he finally says, both sadness and relief in his voice. “I thought there was something wrong with me.”

“There’s nothing wrong with you,” Katsuki declares fiercely, opening his arms wide as Izuku runs towards him with a sob, throwing himself into his arms, burying his face in his chest and letting the alpha hold him.

They stay like that for what could be an hour or the whole night - it doesn’t matter. All that matters is their arms wrapped around one another, basking in the sounds of each other’s heartbeat as the world moves on around them, insects buzzing, fire crackling, cars honking.

“Then this means…” Izuku says after the stretch of silence. “That there’s nothing wrong with us being together.”

“Izuku…” Katsuki murmurs quietly. “I don’t -“

Izuku cuts him off, leaning up and tugging the blond down to press their lips together sweetly, and Katsuki melts into it, letting himself have this one final moment - because there’s still plenty wrong with this situation, despite Izuku’s naivety. The omega’s hand cups around his neck, pulling him in deeper, kissing him with every ounce of passion he possesses. Their eyes are closed, the moment sensual and sweet, and Katsuki wraps his arms around Izuku’s little waist, lifting him from the ground as their lips dance. Izuku’s hand cups Katsuki’s cheek softly, and they pull apart to rest their foreheads together, staring into each other’s eyes fondly.

“I’m sorry,” Katsuki breathes, stealing one more chaste kiss. “Izuku, I’m so sorry.”

“Sorry about what?” Izuku asks, pecking his lips. “T-this is perfect, even if it was a bit of a shock. I can be your omega now, right?”

“Izuku…” Katsuki groans. “We can’t. You’re eighteen, princess. I’m forty-one. And the world still thinks you’re my son - and even if we reveal that you aren’t, I still raised you and I’m still more than twice your age. I may not be your biological father, but I’m your dad, and I’m a hero, baby. We can’t -“

Izuku laughs humorlessly, twisting out of Katsuki’s grip. “So it’s about what other people think, huh? You want me, but you’re scared of what the precious tabloids might say.”

“It’s more than that,” Katsuki says, reaching out to grab Izuku’s hand only for it to be yanked away. “I don’t give a shit what people think, baby, but I could be stripped of my number one spot. I love you, I really do, in more ways than one -“

“Got it,” Izuku interrupts. “I’ve always been less important than your hero stuff. This is nothing new.”

“Goddamn it, would you stop with that?” Katsuki growls, stepping forward as Izuku steps back. “I owe it to the world to be the number one hero, this is bigger than you and I!”

“Okay,” Izuku says duly as he pulls away. “You’ve already made your decision, then.”

“Izuku, wait,” Katsuki says hurriedly, holding the sliding door closed as Izuku begins to pull it open dejectedly.

“No,” Izuku says. “Maybe you’re right. I deserve an alpha that isn’t ashamed of being mine.”

Katsuki instinctively growls at the thought. “You’re mine.”

“Can’t have your cake and eat it too, daddy,” Izuku says, voice low, yanking the door open and slipping inside without another word.

*

Izuku elects to spend as much of his time out of the house as possible, going out with Ochako to run errands, spending time at Momo’s classic mansion, studying at the beach as he feeds stale fries to the noisy seagulls.

It’s a hot day, exactly three weeks after the heartbreaking conversation on the veranda with Katsuki. He doesn’t even call the blond dad anymore when they make civil conversation when needed, and it brings him a revenge sort of satisfaction when the man’s face twists at being called by his first name. 

“We should go to Shindo’s summer party,” Mina pipes up, the four omegas sprawled around Momo’s room, cooling themselves off under the AC.

“He’s throwing a party?” Izuku asks, sitting up and stretching. “Since when?”

“Well, I don’t think he’d tell you anything after your dad nearly cut his balls off,” Ochako laughs.

“Not my dad,” Izuku growls, because of course he’d told his friends - while leaving out a few important details, of course. Even if he’s hurt and pissed beyond belief, he wouldn’t share their private issues, especially because it could get the blond in deep shit as the active number one hero. As much as it makes the omega’s heart sting to keep it all inside.

“Does this mean he’s fair game?” Ochako jokes. “God, he’s such a fucking stud. I bet he has a huge -, “

“Don’t,” Izuku cuts in, voice low and threatening, and to anyone else it would seem he’s disgusted at the thought, but the truth is that the mere notion has his gut twisting in jealousy, possessiveness, anger.

“I know, I know,” Ochako laughs, holding her arms up. “So, about the party.”

Izuku’s shoulders untense. 

“He’s throwing it at his parent’s beach house,” Momo says, scrolling through her phone to get the details. “Tonight at 9. We’re going. It’ll be good for you, Zuzu! Maybe you’ll find a nice alpha to take your mind off of your not-dad.”

“Maybe,” Izuku says idly. Maybe it’ll be nice. Maybe he just needs a big, strong alpha to hold him and fuck him to help him get over Katsuki. Maybe finally losing his virginity is what he needs. 

“Then it’s settled,” Mina says with an excited clap. “Fucking hell, this is our last High School party before we start our sidekick gigs!” She shoots Izuku an apologetic glance. “OR college. We’re goddamn going.”

*

There’s a loud pulse of music as Izuku slides out of Momo’s passenger side, and he pulls his short tank top down self-consciously and folds his hands in front of his ass-hugging jeans - the outfit had been Mina’s idea, and she’d admired her work after, calling him fuckable as fuck. 

He feels entirely exposed, but even he can admit that he looks good as hell. His little waist is on full display, perfectly accentuated by his jeans, and his ass looks amazing. That’d been the goal in coming here, after all, so he takes a deep breath and links arms with Ochako, walking into the already lively party with a light blush on his face, remembering why he hates parties as soon as he steps in.

“Hey, Midoriyaaa!” Tetsu immediately greets, his breath reeking of cheap beer and lipgloss. “You’re looking fine.”

All it takes is a sharp glare from his boyfriend, Monomo, to have the steel-quirked boy pulling away with a sheepish grin.

“Thanks, Tetsu,” Izuku says shyly, accepting the drink someone hands his way. It’s a concoction of fruit punch and liquor, made just a bit too strong, and the first sip burns going down - but it feels sort of nice, he supposes, to be here living his life as a teenager. He’d only over been to one other party, and it’d ended with the cops showing up. He’d luckily snuck away before he was caught, and his dad - no, Katsuki - was none the wiser.

He sits on the couch, chatting with a few of his classmates as he downs his drink in a few gulps, wincing at the flavor but chasing to feel that blissful buzz that comes with it.

His cup is immediately filled, and he looks up just in time for Ochako to send him a wink as she’s dragged off by some red-haired alpha girl. He sends her a wave that he hopes says text me if you need help, but she just pulls the alpha in for a kiss as they go, so he assumes she’s alright.

The house is dark, the music vibrating through his body as he’s hit on by a few different alphas, waving all of them off because his inner omega just isn’t feeling any of them - and no, not because they’re not Katsuki , or so he keeps telling himself. 

“Hey,” someone says, a big hand landing softly on his shoulder.

Izuku looks up, swallowing when he sees Shindo standing over him, his ex-boyfriend looking entirely too good in the rainbow strobe lights. 

“Hi,” Izuku says shyly, rubbing his arm self-consciously.

“It’s a bit stuffy in here,” Shindo laughs, running a hand through his dark hair. “Do you wanna go for a swim? Less people out there.”

“I didn’t bring a bathing suit,” Izuku says mournfully, because he honestly wants to say yes - the beach house sits right on the ocean, a perfect view of the gently lapping waves and white sand. It’s a clear night, and he bets the moon and stars look like a cloud of twinkling lights.

“My sister has one you can borrow,” the alpha says, offering Izuku yet another drink - he’s already pleasantly tipsy, but he accepts it anyways, taking a sip with a shy bat of his lashes.

And that’s how they end up standing in the peaceful water, Izuku’s thick thighs wrapped around Shindo’s muscular waist, the two of them bobbing with the waves as they make out.

Izuku barely feels anything, just slick lips moving against slick lips as he goes through the motions - no spark of magic, nothing more than instinctive, dull arousal toiling in his gut. But it feels decent to kiss someone who means nothing, to feel like a simple kid who isn’t in love with his adoptive father who’s more than twice his age.

“This feels like revenge, sort of,” Shindo says between kisses, a smug aura about him. “Your dad’s a goddamn psycho for what he did.”

Izuku’s face twists. “Don’t talk about him.”

“Ah, trouble in paradise?” Shindo teases, unknowing of how close he is to the truth.

“You could say that,” Izuku says, tilting his head back for Shindo’s wandering lips, the alpha peppering his freckled neck and shoulders with rough kisses.

Shindo drops the topic, luckily reading the room with enough tact to realize Katsuki really isn’t something Izuku wants to talk about. His hands begin to wander, and Izuku lets them, his head feeling blessedly dizzy and light. His ass is groped, big hands squeezing the globes of fat and roughly kneading them.

“You’re so fucking pretty,” Shindo murmurs, pulling the omega’s bottom lip between his teeth. “Fat ass, thick thighs, cute face. You have no idea how many alphas want you.”

Izuku hums, because the only alpha he cares about doesn’t want him back.

The party is beginning to die down a bit, tipsy teenagers finding their way home or crashing in one of Shindo’s many guest suites.

“What do you say you and I hang out in the pool house?” Shindo says slyly. “Maybe watch some movies, smoke some weed.”

Shindo’s pool house is huge and just as nice as the main house, all decorated with beach themes and clean enough to eat off the floors. The master bedroom has a huge TV mounted on the wall, and the two of them cozy up on the bed, Shindo unbashful in his wants - he spoons behind Izuku, kissing along his neck and running his hands down his sides as they watch a true crime documentary.

It’s not until the alpha goes and makes them drinks that Izuku realizes he doesn’t know what the fuck he’s doing. He’s not ready for any of this, and here he is, leading Shindo on like a - like a -

Izuku quickly sips at his drink as his heart rate spikes, desperately chasing the uncaring vibe he felt earlier. He has to want this. He has to feel the touch of someone else to wash away the feeling of Katsuki that still graces his skin with ghost touches, making him shiver and want.

But -

“I don’t think we should go all the way, Shindo,” Izuku slurs, suddenly feeling disgusted as the dark-haired man begins to rub his pussy through his bikini bottoms.

“Why not?” Shindo says, sucking on his neck and rubbing his clit through the thin material, clearly wanting more, wanting to defile Izuku like he’s probably been dying to since the omega’s dad made a complete and utter fool of him.

Izuku lays there, eyes pinched shut as the panic begins to rise into his chest, because Shindo isn’t listening, pulling his bikini to the side so he can slide his fingers along the omega’s bare pussy lips, moaning and huffing against his neck.

“I-I need to use the bathroom,” Izuku squeaks suddenly, standing and righting his bikini bottoms, darting off to the guest house’s bathroom on shaky legs, his whole body feeling disgusting, still feeling Shindo’s wrong hands on him.

He closes the bathroom door behind him with a click, his legs immediately giving out as he falls to the floor with a quiet sob, pulling out his phone with uncoordinated hands as he clicks on his dad’s contact on auto-pilot.

“Izuku? Are you okay, baby?” Katsuki immediately answers, sounding like he’s waking up from a deep sleep, and oh god, Izuku is a complete fuck up - here he is leading one alpha on while he wakes another up from his much needed sleep after a long day of being the number one hero.

“D-daddy,” Izuku hiccups, gripping the phone with tight hands. “Can you come pick me up?”

Izuku hears the telltale jingle of keys not five seconds later.

“What’s wrong, baby? Where are you?” Katsuki says, house voice noticeably lower, threatening. Pissed.

Izuku rattles the address off to his dad, knees shaking as he hugs his free arm around them, feeling like the biggest fucking loser in the world. He shouldn’t have come. He shouldn’t have led Shindo on, and now he’s going to have to walk past the dark-haired boy on his way out and explain that he chickened out and had to call his dad to come pick him up. 

“I’m on my way,” Katsuki says, and Izuku can picture the way his jaw is clenched tight. “Stay on the phone with me, princess.”

“Thank you daddy,” Izuku says quietly, his teeth almost chattering with anxiety as he shakes on the floor. “Please hurry. I have to go, but I’ll be outside waiting, okay?”

“Izuku, wai -,” Katsuki immediately bites out, but Izuku is already hitting the red button to hang up, standing up and feeling like a baby deer walking for the first time as he pushes the door open.

Shindo is still in the bed, but he’s sitting up, watching Izuku with these predatory eyes that have the omega feeling like nothing more than a piece of meat. His expression is blank, his abs rippling as he stands, and Izuku suddenly realizes how much bigger Shindo is than him. Not as big as Katsuki, but more than big enough to overpower Izuku, even without the quirk.

“Who were you talking to?” Shindo asks, his voice deeper than Izuku has ever heard it. 

Izuku, who feels the room spinning a bit as he makes his way closer, his eyes fighting to stay open as he practically falls against the dark-haired alpha, the alcohol finally catching up to him. 

“Woah there,” Shindo says with a chuckle, catching Izuku in his arms and lowering them both down to the bed. “Let’s keep watching movies, yeah? You seem a bit out of it.”

“O-okay,” Izuku slurs. That sounds good. He just has to keep himself and Shindo busy until his dad gets here. Yeah.

They sit there in silence for a few minutes, the main character of the show they’re watching being stabbed at the end of episode 9 for a ‘shocking’ cliff-hanger, but Izuku is barely paying attention - it’s not like he doesn’t know the main character will be fine, anyways. They always are.

“ - like I was saying, you’re just so goddamn hot. I’ve wanted you since I first saw you in first year, ya know,” Shindo is saying, and Izuku blinks rapidly at the ceiling. “That tight little ass in that stupid uniform gave me whiplash.”

“Really?” Izuku asks, slurring, barely understanding what he’s replying to. “I thought you were cute, too.”

A complete fallacy, not that Shindo needs to know.

The truth is, the only alpha Izuku has ever really noticed is the one that raised him. He never even had those school kid crushes, he was always too fixated on the blond - it hasn’t always been such an intimate infatuation, but it’s always been an infatuation, that much is certain. All of it reached a head once Izuku hit puberty and started feeling things that no omega should feel towards their sire, but that whole shitshow makes sense now, he supposes. Katsuki isn’t his sire.

“I’ve been dreaming of you in my bed for years,” Shindo is saying, and he’s back to rubbing on Izuku’s arm softly. 

“Like I said,” Izuku says, his vision swimming a bit. “I don’t know if we should go all the way, Shindo.”

“I think we should live a little,” Shindo whispers, slowly dipping his head to capture Izuku’s lips with his own again, the two of them moving against each other sensually - it’s mostly Shindo guiding his movements, but Izuku doesn’t fight it, feeling too out of it to even think properly. 

All he knows is that this feels kinda - sorta - …nice. It’s nothing like kissing Katsuki - no sparks, no metaphorical fireworks going off behind their heads, and certainly no mind-numbing pleasure. But it feels nice to to be carefree for just a moment. To forget the fact that he’s hopelessly in love with the man who raised him, the man he thought was his actual father until just a few days ago.

But - that’s the thing, isn’t it? Shindo isn’t Katsuki. Shindo isn’t the one Izuku wants, the one his body is so clearly craving. He isn’t the fiery blond that Izuku wants his first time to be with, as impossible as it may be. 

And so, Izuku pushes Shindo back with a gentle palm, their lips disconnecting with a soft, wet noise. 

“I’m just not ready, Shindo,” Izuku says quietly, and he feels a sliver of pride in his chest, because even though his mind is screaming for a distraction from the constant stream of Katsuki, Katsuki, Katsuki… it accepts that this isn’t going to make him suddenly fall out of love with the man. Nothing will.

Shindo frowns. “But you were ready, the night of the party. If your dad hadn’t caught you sneaking out -”

“I wouldn’t have been ready then, either,” Izuku admits, biting his bottom lip, hating the way it tastes like alcohol and Shindo. “I think - I think I was just using you as a distraction, and I’m sorry for that.”

“A distraction from what?” Shindo asks, running his hands along Izuku’s sides. “Izuku, I want you. And you obviously want me back, so why don’t you just let me show you how good I can make you feel?”

Izuku whimpers as those hands move to grab his ass again, nausea and wrongness filling his belly, and when Shindo wrenches his thighs apart and starts to pull the bikini bottoms from his hips, the omega knows that his distressed scent is beginning to fill the room - and Shindo doesn’t stop, just latches his lips onto his slim neck and tongues at his scent glands.

“Shindo, stop,” Izuku whines, rough, big hands sliding the bottoms completely off, throwing the scrap of material to the floor carelessly. He’s completely exposed now, his thick thighs pressing together, but Shindo forces them apart. “Please stop!”

“C’mon,” Shindo groans, thick fingers cupping his pussy, thumb moving to rub rough circles into his clit. “You’re so wet, baby. You want this.”

Baby. It feels so, so wrong to hear that word coming from a mouth that isn’t Katsuki’s. He hates it. 

Izuku feels like he’s trapped - and for all intents and purposes, he is. Trapped by Shindo’s strong arms, his demanding lips, those hands that are touching him in his most intimate spot, the place where only himself and Katsuki have ever touched.

Without even thinking, he grabs the offending hand, trying to pry it free, but Shindo simply flexes his arm in a show of strength, and Izuku’s desperate pulling amounts to nothing. He feels weak, hopeless -

“Relax, shhh,” Shindo purrs, nipping at his ear playfully, like this is all a joke. Like Izuku’s consent is a joke. “Let me make you cum.”

“I don’t want this, Shindo,” Izuku cries, tears springing into the corners of his eyes. He tries to make eye contact with the alpha, tries to plead with his eyes, but all that looks back at him are dark eyes full of hunger and lust.

“You won’t be saying that when you’re cock-drunk on my knot,” Shindo coos, pressing their lips together and forcing a muffled cry out of Izuku.

Those fingers rubbing his slit begin to dip into his wet hole, the tips pressing into the pliant warmth -

The door flies open, the handle slamming into the wall, and with it comes the scent of alpha, home.

Fucking pissed alpha.

Kats - 

“Daddy,” Izuku sobs out, and all hell breaks loose.

The look of pure and utter terror in Shindo’s eyes would be entertaining in any other situation - he looks like a deer caught in headlights, coming to terms with his own looming death.

The younger alpha lets out a choked scream when the blond is in front of them in milliseconds, Katsuki yanking the younger alpha up by the neck, dragging him away from Izuku with force.

“I’m debating whether or not I should break your pathetic little neck into a billion fucking pieces right now,” Katsuku growls, looking feral - Izuku has never seen him this angry, his usual warm smelling campfire scent smelling like a building burning to the ground in fury. 

Izuku clutches the sheets to his chest, tears streaming down his face as he looks back and forth between Shindo’s petrified face and Katsuki’s furious one.

“Don’t hurt him,” the omega finally chokes out, because although he wants nothing more than to see Shindo get instantly karma’d for not taking no for an answer, Katsuki can’t have that type of thing on his record as the number one hero. “Y-your career.”

“I’d get away with it,” Katsuki promises. “Wouldn’t I?” He asks Shindo, the younger alpha scrabbling in the older’s grip.

The black-haired boy nods mutely, choking for air.

“See, he knows,” Katsuki coos mockingly. “I’d make sure his fucking name was wiped off the records. It’d be like he didn’t fucking exist.”

Izuku shivers, because this shouldn’t be hot to him, right? He shouldn’t be squeezing his thighs together to hold back a rush of slick as he watches Katsuki’s big arms ripple, his brows furrow angrily - all because another alpha dared to touch what’s his.

“Don’t hurt him,” Izuku says again, less sure of his own words this time. “Let’s just go home, daddy.”

Katsuki’s eyes dilate for a moment at that word, and Izuku nearly whines at the way the blond’s cock subtly twitches in his pants.

God, they’re so fucked up - Shindo’s barely hanging onto his life as his face turns blue in Katsuki’s grip, and here they are emitting enough sexual tension to power a small city.

Katsuki drops Shindo onto the floor with a snarl, the younger alpha scrabbling at his own throat as he wheezes for air, curling up on the ground pathetically.

Just for good measure, Katsuki delivers a swift kick to the younger’s ribs, and Izuku winces at the resulting cracking noise followed by a blood-curdling scream of pain from Shindo.

“Go get that fixed as soon as possible,” Katsuki mocks. “Wouldn’t want your pathetic little ‘career’ to end before it’s even started.”

With that, Katsuki steps over a sobbing Shindo, the younger alpha clutching his ribs and gasping, and takes off his shirt, pulling it over Izuku’s nude form.

Katsuki’s torso is littered with scars from past fights, and Izuku shivers as the blond pulls him into his arms and the soft skin of his own thighs catches on the older’s rough patches of skin.

Izuku lets his head fall against Katsuki’s tattooed shoulder, lulled to sleep as the older man walks them to his car. 

*

Izuku wakes up to the smell of bacon and eggs, birds happily chirping outside his window.

His head feels like it’s full of cotton, but he still drags himself out of bed with a groan and a stretch, because there’s no way in hell he’s going to miss out on his dad’s bacon and eggs. 

No - Katsuki’s bacon and eggs. He really needs to stop referring to the man he’s in love with as his father.

Because he’s not his father. God, this is so confusing.

Izuku pads downstairs to the kitchen with soft footsteps, biting his lip as he looks around the corner and watches the blond’s back muscles work as he cooks at the stove.

He looks ethereal, perfect, and Izuku can’t help but walk up behind him and wrap his arms around his broad torso, his chest clenching for a moment when Katsuki tenses up and then immediately relaxes.

“You sleep well, sweetheart?” The blond asks softly, turning his head to the side to look back at the omega. “Are you okay?”

Izuku just nods, soft hair rubbing against Katsuki’s big back. He’s not sure what to do - what can he do? Their last real interaction had ended with Izuku storming off.

Now it’s a beautiful Saturday morning, the sun streaming through the breezy blinds in the kitchen, and Izuku is left entirely unsure of where they stand.

“I’m okay, really. You got there just in time,” Izuku whispers. “Thank you… and I’m sorry, for everything,” he continues after a few moments of silence - the two of them just listening to the sounds of the world, basking in the touch of each other’s skin. “I understand why you can’t be with me. Or don’t want to be.”

Katsuki tenses in his arms, muscles clenching under Izuku’s touch. “You know it’s not that I don’t want to.”

Izuku shrugs, nuzzling his nose into the blond’s warm skin. “Do I?”

The resulting growl that rumbles in Katsuki’s chest has the omega squeaking, barely able to catch his barings before he’s being spun around and (softly) slammed into the kitchen counter, and then -

A pair of lips are on his own, soft yet demanding, and Izuku is all too eager to part his own lips for the blond’s demanding tongue, letting the bigger man lift him onto the counter with laughable ease.

Izuku’s thick thighs snake around the alpha’s trim waist, his hands running over every bit of Katsuki’s skin that he can touch - his arms, his chest, his face.

Katsuki keeps him bracketed in, the sounds of their desperate kisses echoing around the otherwise quiet kitchen - wet lips, soft pants, and an occasional grunted growl from the blond.

“You have no fucking clue what you do to me,” Katsuki groans against his mouth. “Last night, I couldn’t fucking think straight - the idea of someone hurting you, touching you. So don’t you fucking dare think I don’t want you. That I don’t love you more than anything in this world, both as your father and your - your..,” he trails off. “No matter how fucking wrong that is.”

Izuku whimpers at those words, letting them wash over him like a warm shower.

“I just - fuck,” Katsuki continues. “I don’t know what to do, babydoll.”

Izuku bites his lip, because he knows exactly what he wants Katsuki to do. He wants this stupid tension to just end, because it’s so clear that they want each other, no matter how fucked up it would be if anyone found out - even though they’re not related, Katsuki raised him. Nurtured him. He’s his parental figure, and even though they’re not related by blood, their relationship is convoluted and fierce. And Izuku doesn’t want to think too deeply on it right now, because -

The idea of the man who raised him bending him over and ruining him for any other alpha shouldn’t be appealing, but is so fucking is, and the taboo factor just makes his pussy pulse harder in his panties, tilting his neck to the side as the blond trails kisses and licks up his skin.

“I want you to fuck me, daddy,” Izuku whispers in the blond’s ear, words like sweet, sweet honey.

Katsuki’s lips still, and Izuku can’t even find it in himself to panic, because he knows the blond wants him, can feel the desperation in his neck kisses and smell the arousal in his comforting scent.

And so he does what anyone else would do in his situation, and reaches down, gently groping Katsuki through his boxers, nearly purring when that big cock immediately jumps and hardens at the attention.

“You don’t know what you’re doing,” Katsuki grunts, hips twitching into Izuku’s touch against his own free will.

“Daddy,” Izuku says, pulling the blond down for another filthy kiss. “I know exactly what I’m doing.”

It’s like something in the alpha snaps, like the reigns of willpower he’d been holding onto, holding himself back, is snapped cleanly in two, and Izuku barely has time to react before the blond is flipping off the stove, leaving the food abandoned as he carries the omega towards his bedroom.

Katsuki grabs a towel from his closet to lay down and deposits him on the bed, looking down at the younger’s flushed face, his splayed thighs, his panties peeking out from underneath his oversized sleep shirt, a wet patch already forming on the baby blue fabric.

“So fucking beautiful,” Katsuki says, not a hint of insincerity in his voice, and Izuku keens at the praise, his inner omega bubbling with excitement - alpha is finally accepting us, he’s gonna breed us, fuck us -

“I need you,” Izuku whines, and he can feel a heavy arousal settling in his abdomen - Katsuki is on the brink of pushing him into an early heat just from finally accepting him back, and the power the blond holds over him is nothing short of the biggest turn on of his life. “Daddy, I think ‘m going into heat.”

Katsuki groans, his nostrils flaring on instinct, eyes dilating when the sudden scent of omega heat hits his nose - soft vanilla, delicate peach, and an undercurrent of pure sex.

Izuku looks like a pretty picture all laid out on his bed like this, his soft skin contrasting with the dark, comfortable sheets. The omega’s cheeks are rosy and flushed, eyes hooded with arousal, legs trembling as the beginning stages of his heat begin.

“Shh,” Katsuki shushes, running a calloused finger along the inside of Izuku’s thigh, relishing in the way the younger man shivers in delight. “Daddy’s gonna take care of you.”

His finger trails down to the seat of Izuku’s panties, and the omega keens in delight when he runs the pad of it gently over that puffy, wet little slit through the fabric.

The green-haired boy just whines and pulls his own shirt off over his head, putting his pink little nipples on display before hooking his finger around his panties, pulling them aside to give Katsuki a perfect view of his pussy.

The blond groans, his cock immediately going from a semi stiffy to rock hard, aching more than it ever has, begging to just slide right into that virgin pussy and fuck it like an animal, lost in the instinct to dominate and breed - 

But no. This is Izuku’s first time - laid out on Katsuki’s California king bed, his thighs trembling with nerves even as drool dribbles down his chin and slick pours from his pussy from how aroused he is.

Katsuki’s got to make sure it’s perfect for his baby boy. He deserves nothing less.

And so he hooks the omega’s small ankle up over his own broad shoulder, turning his head to the side to begin a trail of soft kisses down the boy’s leg, making sure each press of his lips is wet and slow as he slides the omega’s cute little panties off, leaving Izuku completely naked, the entirely of his tight, smooth body on display.

Izuku is keening by the time Katsuki reaches his thighs, sucking on the soft skin there for just a moment - pulling back when it turns a light red, leaving just a tiny mark of his ownership.

One of the omega’s hands has found its way into Katsuki’s thick hair, and the blond snorts when the feisty little shit begins to tug his head towards his slick cunt, demanding.

“Kiss my pussy now,” Izuku whines, begging and sweet, reaching his free hand down from where he’s been toying with his nipples to spread open his chubby pussy lips in an upside-down V shape.

Katsuki just stares for a moment, cock feeling like it’s about to explode from how hard he is, balls already hanging heavy and full, his primal alpha brain excited to fuck and breed such a young, fertile omega.

But he’s not a teenager, and so he simply smirks, easily pulling his hair out of Izuku’s grip, and presses his thick fingers to the boy’s clit, circling gently, teasing, enjoying the slick sounds from how fucking wet he is.

“Wha -?” Izuku warbles, eyes hazy and unfocused as he grinds down against Katsuki’s fingers, the blond using his free hand to press down on the little minx’s hips to stop the movement, and the alpha nearly groans from the frustrated, aroused look in the other’s eyes. “Please, daddy!”

There are tears now - oh, fuck - and Katsuki’s cock throbs angrily, and he knows he’s ruining his boxers with pre-cum.

“Please,” Izuku sobs, trying desperately to at least move against Katsuki’s fingers where they’re subtly massaging his clit, not nearly enough pressure. “Fuck, d-daddy, please!”

Katsuki coos softly, enjoying this way too fucking much. “Please what, princess?”

“Please eat my pussy,” Izuku immediately cries. “Please, please, please -,”

Katsuki pulls both hands away, and Izuku looks like he’s either about to burst into tears and present himself, circle his little hips around until Katsuki’s resolve breaks, or slam the blond against the bed and sit on his face himself - Katsuki isn’t sure which would be hotter, honestly.

“Spread yourself open, hands under your knees,” Katsuki instructs before Izuku can do anything, voice deep and leaving no room for disobedience. “Show daddy what he owns.”

Izuku whines, high-pitched and loud, and immediately does exactly as told like a good bitch, lifting his legs up and back and leaving himself spread open, vulnerable, because he trusts his daddy so fucking much.

Izuku’s thighs and the towel below his ass are coated in slick, the omega’s soft pink little pussy clenching and unclenching rhythmically, more slick drooling out with every movement.

It’s easy to slide Izuku further back on the bed, and the mattress is so high up that blond only has to lean forward a bit to be face-to-face with the most beautiful pussy he’s ever seen.

“Fuck,” Katsuki breathes out, and Izuku shivers at the warmth against his sensitive lips. “Look at that fuckhole.”

Izuku purrs, still holding himself open for his alpha, thighs trembling in his grip. “It’s yours, daddy.”

“That’s right,” Katsuki groans, inner alpha purring. “Mine to fuck, mine to own, mine to fucking ruin.”

He doesn’t give Izuku time to respond before flattening his tongue and licking slowly, languidly, from the bottom of his omega’s pussy, the tip of his tongue briefly teasing his pink little asshole, all the way up to his clit. The taste is like nothing he’s ever experienced, sweet and fertile and like it was made just for him.

Which, he supposes, it was. Katsuki watched this boy be born into the world, raised him, and now, 18 years later, he’s picking the fruits of his labor - a young, tight little omega to fuck and own as he gets older and reaches retirement age.

God, that’s so fucked up.

So why is his cock harder than it’s ever been?

Izuku’s loud moan of pleasure breaks him out of his thoughts, and Katsuki responds by sealing his mouth over the omega’s clit, rapidly flicking the nub with the tip of his tongue as he sucks.

Izuku screams , legs falling out of his grip, his thighs squeezing around Katsuki’s neck brutally as he yanks at blond hair, pulling the alpha’s face into his pussy as hard as he can.

Katsuki groans, circling Izuku’s clit with his tongue now, occasionally dipping down to his tight pussyhole to catch a tongueful of that fresh, sweet slick, the taste blossoming on his taste buds like a delicious snack.

“O-oh f-fuck,” Izuku sobs, voice vibrating, hips undulating down into Katsuki’s face, needing more, more, more. “R-right there, daddy, right there!”

Katsuki listens, licking over his baby boy from the exact same angle in rapid succession, grinning like a feral animal when it rewards him with even more slick and a litany of those beautiful cries of pleasure.

The blond can feel the tightness in Izuku’s body, in the thighs around his head and the hands in his hair. He can feel how close the omega is to losing it, that tension just about to break and give him that sweet pleasure.

Izuku’s whole body is shaking now, his head thrown back into the plush duvet as he wails at the ceiling and grinds down onto Katsuki’s tongue. 

“I’m gonna cum,” Izuku trills, voice wet with tears. “I-I’m, oh, fuck -,”

Katsuki growls, deep and dark, and licks Izuku’s clit back into his mouth, sealing his lips around the little bud and sucking, demanding and rough.

Little whimpers of oh, oh, oh are punched out of Izuku’s chest between moans and cries, and Katsuki can’t get enough of them, slurping on his omega’s pussy loudly.

And then - Izuku’s back is arching with a scream, his pussy clenching up as that tension leaves his body with his orgasm, a rush of slick pouring out and coating Katsuki’s chin and lips.

The omega’s hips twitch with it as Katsuki licks him through it, swallowing down as much of that slick as he can, dipping his tongue shallowly into that soft, pliant hole to get it straight from the source until Izuku is clenching around the muscle softly in overstimulation.

“That’s it,” Katsuki murmurs into his thigh after sliding his tongue out, pressing a kiss to the shivering skin there. “Good baby.”

Izuku whines, body still spasming from the hardest orgasm of his life, wrenched out of him by his own not-dad.

“Was I really good, daddy?” Izuku slurs, hearts practically dancing in his big, pretty doe eyes as he looks down at Katsuki, lips pouty and begging for approval and kisses.

“The best,” Katsuki croons, letting out a deep, soothing alphan grumble as he crawls up into the bed to wrap his princess up in his arms, licking into the omega’s mouth so he can taste just how good he was for himself.

Izuku moans at the taste of himself, shyly sucking Katsuki’s tongue to get more of it, pliant and sweet as he lets the alpha arrange them so that they’re sitting up against the pillows propped by the headboard, the older man tucking the omega between his legs.

Izuku has to tip his head back against Katsuki’s shoulder and look to the side to continue the hot kiss, leaning back comfortably into the alpha’s strong body where he himself leans back into the pillows.

Katsuki’s hands roam over his body, possessive and gentle, the omega’s body looking like a renaissance painting in the dim lighting of the room while Izuku runs his tongue softly over Katsuki’s wet lips, clearly loving the taste of his own slick much to the blond’s delight.

One of the alpha’s big hands trails down to his pussy again, the omega jolting and whimpering when a big finger presses at his slick hole, still sensitive from his mind-numbing orgasm.

“I have to stretch you out, baby boy,” Katsuki says softly, gently but firmly spreading the boy’s legs apart so that his thighs rest over his own, his puffy, red pussy on full display again. 

Katsuki can’t help but run his hand over that soft, saliva-and-slick-soaked cunt a few times before softly slapping the lips and clit with two fingers, smirking when Izuku instantly moans and spreads his legs wider.

Jesus, what kind of monster has he created?

“Again,” Izuku demands sweetly, and Katsuki obeys - slapping slightly harder this time, cock throbbing painful and forgotten in his boxers when Izuku’s head falls back against his shoulder with a hot whine.

Katsuki soothingly rubs two thick fingers up and down the wet slit, using his other hand to brush his thumb over one of Izuku’s pink nipples, groaning when the bud immediately stiffens with his touch.

He pinches it teasingly at the same time that he dips the tip of his thick middle finger into Izuku’s hot pussy, and the omega squeaks at the double sensation.

“Oh,” Izuku breathes out, eyes fluttering closed when the finger slides inside smoothly, right to the root, the hand on his tits groping softly. “Yeah, daddy.”

Katsuki’s chest rumbles again, slowly pulling his finger out and groaning at the amount of slick coating the digit before sliding it back inside, slow and firm.

“Gonna be so tight on daddy’s cock,” Katsuki whispers, deep, pressing a gentle kiss to the side of Izuku’s head and nipping at his ear. “Aren’t you, sweetheart?”

“Mmmmm, yeah,” Izuku moans, turning his own head to the side from where his eyes had peaked open to watch Katsuki finger him with a hooded gaze. He kisses the blond’s chin, trailing down to kiss and lick at his alpha’s neck. “Can’t wait to cum on your knot, daddy.”

Katsuki groans, working his finger in and out of Izuku’s tight, wet hole until he feels it become more relaxed and pliant, and then he’s lining up the second digit, pressing them both inside as Izuku hiccups and whines into his neck.

“Oh yeah, babydoll?” Katsuki croons. “How’re you gonna take my knot if you’re this tight around two fingers?”

“I can take it!” Izuku immediately responds, voice petulant and childish, accompanied by the squishy schlick of Katsuki’s fingers pumping in and out rhythmically.

Katsuki smirks predatorily. “My cock’s gonna break you, princess.”

“I don’t care,” Izuku whines, genuine and soft. “My pussy is yours to break, ‘cuz you’re all I want.”

“Shit,” Katsuki grunts, his cock flexing angrily at those words, demanding to bury itself in this soft virgin cunt. “You can’t just say that shit, beautiful.”

“I want you to ruin my pussy for anyone but you,” Izuku continues, this devious, evil little look in his puppy dog eyes as he looks up at Katsuki. “Alpha.”

Katsuki can feel his pupils dilating and his heart rate spiking just from hearing Izuku call him alpha in that sweet, sweet voice, face so trusting and innocent as he looks up at the man who raised him, who’s more than twice his age, and begs him to ruin his pussy. 

How could Katsuki ever fucking say no?

The blond pulls his fingers free from Izuku’s slick pussy, groaning when the omega immediately opens his plush lips for the digits when Katsuki presses them to his pout.

Izuku’s eyes are hooded as he wraps his lips around the slick-coated fingers, moaning quietly as he sucks them clean, bobbing his head like a good boy.

“That’s it,” Katsuki praises. “Suck them just like you suck your daddy’s cock.” 

Izuku hums, swirling his tongue around and in between the digits, the little sliver of his eyes glistening in the dim room, looking up, never leaving Katsuki’s face, so desperate for approval and praise. Guidance.

“Good fucking boy,” Katsuki murmurs, slowly pulling his fingers free with a pop, chuckling when the little slut’s lips chase after them. “Why don’t you get my cock nice and hard for your pussy, baby?”

He’s already rock solid, but he wants to see those plush lips stretched around his shaft again, watery doe eyes looking up at him lovingly like he’s the best thing to ever exist. Sue him. 

“Yes, sir,” Izuku immediately chirps, and Katsuki’s eyes nearly bulge out of his head because shit, that’s a new kink to add to the ever-growing list.

All Izuku’s fucking fault.

Izuku bounces out of his arms excitedly, turning around and settling on his knees between Katsuki’s lazily spread legs.

Katsuki’s cock is straining against his boxers comically, the size of it stretching the loose fabric taut, and Izuku giggles as he pulls them off, leaving that fat, long shaft to slap against the alpha’s washboard abs.

“Fuck, daddy,” Izuku whines, immediately cupping the alpha’s swollen, heavy balls and massaging them gently. “You’re gonna fill me so good.”

Katsuki groans at the pleasure of his cock finally being paid some attention, leaning back and laying his head against his stacked pillows. “You want that, baby boy?”

“More than anything,” Izuku sighs, pressing his wet lips to the angry tip, rubbing them over the sensitive head teasingly. “I’ve never wanted anything more than I want you to use my pussy.”

“Use, huh?” Katsuki asks, voice dark. 

“Yeah,” Izuku croons, sticking his tongue out to catch the bead of pre-cum welling at the alpha’s slit. “Just wanna be daddy’s little fuckhole.”

The little omega’s hips are wagging in the air as he bends down to service Katsuki’s dick, and the alpha can tell that Izuku’s heat is really starting to set in, his back arching obscenely as he pops the head of that thick cock between his pink lips.

“Mmm,” Izuku moans appreciatively, making sure his hooded, aroused gaze meets Katsuki’s own. 

The boy runs his tongue down the shaft, slowly bobbing deeper and deeper, his hot mouth slick and soft. He rests his hand at the base, working his naturally talented little mouth down the length until he’s kissing his own fist, his throat opening up perfectly for the intrusion. 

“Fuck,” Katsuki groans, his own eyes hot and hooded and his head tilting back in pleasure as he watches his baby deepthroat him. “That’s it, princess.”

Izuku moans around the cock, removing his hand and pressing down even deeper, and Katsuki’s eyes are suddenly wide open as every inch of his cock slides into the omega’s mouth, all the way down to the base.

Izuku's throat tightens around the shaft, but he holds it there, eyes watering as he looks up at Katsuki adoringly and shallowly bobs up and down at the bottom, tongue peaking out of his mouth to tease his balls. 

Fat, wet tears streak down the omega’s cheeks, a bit of drool coating his chin, and Katsuki is one hundred percent positive that he’s never seen a more erotic sight in his life - besides maybe the pussy he just buried his face into.

He cups one of Izuku’s tear-stained cheeks. “Give me a show, babydoll. Nice and slow.”

Izuku whines around him, but instantly obeys, lips stretched wide as he slowly pulls up to the tip, shifting on his knees so that his perky little ass is fully visible as well, and slides back down to the base.

“Yeah,” Katsuki growls, deep from his chest, studying Izuku’s face, the tears, the hot little blush, the wet lips desperately swallowing him down.

Izuku looks right up at him, so good and obedient, picking up the pace, slurping and glucking around the cock fucking into his throat.

“Such a pretty baby,” Katsuki groans, running his hand through Izuku’s hair, guiding him up and down. “Tighten your lips, yeah, princess, like that.”

Izuku moans, eyes blurry, wet and hooded as they look up at the blond. He’s swallowing Katsuki to the root every time he descends down the shaft, opening his throat up so well, the wet sounds of it echoing around the room. 

Katsuki gently pulls Izuku off with a pop, the boy’s lips wet and swollen, a thick trail of saliva connecting him to the tip of the blond’s rock hard cock.

“Pay some attention to my balls, sweetheart,” Katsuki instructs, and Izuku is all too eager to listen, bending over even further to swipe his wet tongue over the seam of the alpha’s heavy balls.

Katsuki watches intently, the omega’s face mostly covered by his thick cock, but he can feel when that soft mouth sucks one of his balls in, the green-haired boy moaning softly as he circles it with his hot little tongue, worshipping it.

“That’s it,” Katsuki murmurs, brushing the sweaty hair from Izuku’s forehead as the boy’s impending heat warms his body.

Izuku’s eyes flutter shut, his tongue dragging wetly over Katsuki’s bull nuts as he moves to the second ball, giving it the same treatment, sucking it in and massaging the now neglected one gently with his small hand.

Katsuki sends a quiet thanks to the universe that his stamina has been trained for years, because his cock is still holding on strong, refusing to cum until he’s felt his little omega cum and spasm around his cock at least three times.

Still - he has to put an end to this soon, because as much as he enjoys watching that tight little body between his legs, he knows it’ll look much better beneath him, pussy gripping his shaft.

And so he reluctantly guides Izuku away from his balls, the omega whimpering petulantly, immediately switching to purring in delight when Katsuki swaps their positions, laying Izuku back against a pillow and moving up over him.

The blond grabs another pillow, shoving it under Izuku’s hips, uncaring if it gets ruined with slick - he’ll buy another.

Katsuki’s heavy, saliva-soaked cock and balls hang low as he adjusts himself over his baby boy, leaning down to press their lips together softly, slowly dipping his tongue into the omega’s mouth, sensual and hot.

“Need you,” Izuku whines, his own tongue shyly licking back. “Need you, daddy.”

Katsuki groans, leaning back so that he can grab hold of his throbbing length, and Izuku’s legs immediately wrap around his trim waist, the omega gasping when the blond runs the head of his cock up and down his soaked slit, not yet pressing in.

The alpha’s dick looks intimidatingly big against Izuku’s little pussy, but the green-haired boy is soaking wet, licked and fingered open and prepped by his heat, and he’s grinding down against Katsuki’s tip needily.

Izuku is practically writhing with desire, cheeks flushed and sweaty and his scent smelling like pure lust and heat.

“We’re gonna go nice and slow, baby boy,” Katsuki says, voice fully alpha, knowing it’ll calm his omega. “I want you to promise me you’ll tell me if I do anything you don’t like, okay, princess?”

“I promise, daddy,” Izuku says dutifully, nodding excitedly, nervously, against the pillow, and Katsuki widens his own legs, dipping his hips so that he can slot his tip at the perfect angle to push inside while also leaning forward again to kiss his princess, knowing that his omega needs his full attention right now. 

Their lips move together slowly, wet and loving, and Izuku’s ankles are crossed behind the blond’s waist and his arms snake around his strong shoulders, stroking the tattoo there distractedly as he anticipates the temporary pain to come.

Katsuki presses his hips forward, intense relief and pleasure washing over him as he finally slides his aching shaft inside, swallowing Izuku’s pained whines at the stretch.

There’s a little moment of resistance, but a firm flex of his hips has Katsuki’s cock bullying its way through the omega’s hymen with a squeal from the boy, and then he’s pressing the rest of the way in until his big, broad body is flush with Izuku’s petite one.

Izuku’s pussy is spasming around him wildly, milking his cock and pulling a deep moan of pleasure from the alpha.

“Big,” Izuku whimpers simply, tears springing at the corners of his eyes again as his poor little hole is stretched to its limit.

“Shh,” Katsuki shushes, letting his baby get used to the first and only cock he’ll ever take, running soothing circles into his hip and pressing gentle kisses to his neck and shoulders. “Deep breaths, beautiful. Daddy’s got you.”

Izuku wiggles a bit, and Katsuki slowly circles his own hips, reaching between them to rub his thumb over the omega’s clit.

Izuku moans softly at the touch, and Katsuki can feel some of the tension in his body releasing, his pussy relaxing around his cock.

Even with the prep and the fact that he’s soaked and in heat, Katsuki is just so much bigger than his sweet little omega, and he knows that he has to go slow, be gentler than he’s ever been before.

“I’m not gonna move until you cum,” Katsuki soothes, thumb working over Izuku’s clit expertly. “I need you nice and relaxed for me.”

Izuku pouts his lips, face covered in tears, begging for kisses, and Katsuki happily obliges.

Izuku’s hips are twitching, his wet hole clenching and unclenching, molding itself to Katsuki’s cock, letting out gasped little whines into the alpha’s mouth as the older man works him over.

“I’m gonna cum,” Izuku whimpers against his lips with a sigh of pleasure. “D-daddy, I-I’m gonna cum on your cock -,”

“Yeah,” Katsuki grunts. “Go ahead, sweetheart.”

Izuku’s abdomen and pussy clench, his back arching with a gasp as a rush of even more slick coats Katsuki’s cock, some of the wetness drooling out around his length and soaking their thighs and the alpha’s balls.

He falls back against the bed, panting hotly, eyes shiny and unfocused as his heat grows stronger.

“M-move,” the omega begs, voice dually nervous and excited as his hole flutters repeatedly from the orgasm.

Katsuki obliges, shifting back on his knees so that’s he’s upright, wrapping both big hands around the insides of Izuku’s thighs, holding them open, before slowly pulling out to the tip, Izuku’s face scrunches up, whining as pain and pleasure fight each other out.

Katsuki rubs his skin gently, soothingly, and sinks back inside with one smooth, firm thrust, punching a screamed whine of pleasure out of the omega, before repeating the action again - and then, he’s slowly fucking in and out of Izuku’s wet hole, tip to base, steady and dominating, and tears are leaking down to the pillow from those big doe eyes as the boy stares up at Katsuki adoringly, lovingly, trustingly.

Izuku’s own hands are gripping the pillow below his head, and he moves one to rest gently on Katsuki’s chiseled abs as the alpha thrusts slowly, feeling the muscle there clench with every swing of his hips.

“Ah, ah,” Izuku whimpers, starting to get used to the feeling of being stuffed and owned, the pain slowly trickling away until all he’s left with is the pleasure of Katsuki’s cock molding its place deep inside, pussy accommodating its new owner perfectly.

Encouraged, Katsuki ever so slightly picks up the pace, and Izuku’s eyes cross and his mouth drops open wider at the pure pleasure that’s suddenly coursing through his entire body as the pain withers and dies completely, the wet sounds of Katsuki pumping in and out of his drenched hole echoing around the room.

“Oh - alpha,” the omega moans, high-pitched and sweet, his thighs fighting in Katsuki’s grip to wrap around the alpha’s waist again, wanting to pull the man in deeper, harder. 

Katsuki grunts, flexing his arm muscles and easily holding the omegas’s thighs in place. “Who’s in charge here?”

“Daddy is,” Izuku chirps, sighing dreamily and biting his lip up at the blond, batting his lashes. “Fuck me harder, alpha?”

“Shoulda known you’d be a brat,” Katsuki growls, eyes glinting dangerously, and he slows his thrusts, wrenching a pitiful whine from Izuku. “First lesson: this pussy is mine, and I decide how to fuck it. Understood?”

Izuku is drooling - he can feel it. He’s nurtured the fantasy of being dominated by his daddy since he hit puberty, but he never could’ve imagined it being this perfect, this hot. His body feels like it’s about to short circuit from how turned on he is, abs and pussy twitching with arousal. 

“Under-schtood,” Izuku slurs.

“Understood…?” Katsuki demands, one hand leaving his baby’s thighs to roughly cup one side of Izuku’s face, forcing him to keep his eyes on him. He slides his thumb over Izuku’s plush lips, groaning when the omega immediately wraps them around the digit, sucking languidly.

“Understood, daddy,” Izuku pants around his thumb, tweaking his own pink little nipple as he watches Katsuki’s angled face soften with a pleased smirk at his answer.

“You’re such a good omega,” Katsuki groans, dipping down to press a gentle kiss to his shoulder. “God, you were made just for me, weren’t you? Met your mother just because she was pregnant with you, just for me.”

God, he hopes Inko can’t see them now. 

Not that it’d make a difference - he’s knotting this pussy if it’s the last thing he does, horrified ghosts be damned.

“Just for daddy,” Izuku agrees, sighing contentedly as he licks and sucks at Katsuki’s thumb - his little whore definitely has an oral fixation, the blond thinks.

Katsuki pulls back up, rewarding his omega’s obedience by picking up the pace just enough that Izuku can feel those big balls slapping softly against his ass.

They reach a comfortable tempo, Katsuki holding Izuku’s legs wide open by the ankles now, looking down at where he’s working his cock in and out of that chubby, smooth, perfect pussy, shaft absolutely soaked in slick, glistening and dripping every time he pulls out to the tip. 

“Play with yourself,” Katsuki instructs, leaving no room for argument. “Want you to cum around my cock again, baby.”

Izuku whimpers, reaching down to circle his clit with his middle finger, hissing softly. “My clitty’s still sensitive from the last one, daddy, I can’t!”

“I’m not fucking you harder ‘til you cum on it again,” Katsuki grunts sincerely, keeping the same steady pace.

Izuku actually gapes up at him, eyebrows furrowed incredulously. “Why are you so meannnn?” He whines petulantly.

But, much to Katsuki’s delight, he continues to play with his clit, eyes watering with sensitivity as he works himself over as the alpha fucks in and out.

“Oh, god,” Izuku pants, fingers moving faster now, his walls clamping down on Katsuki as he cranes his neck down to watch the man pump into him smoothly, squishing and clapping wetly on every downthrust.  “Daddy’s fucking me.”

“Use your other hand to play with your little tits, baby,” Katsuki grunts. 

Izuku complies happily, sliding his hand up his body until he’s able to squeeze one of his flat pecs, feeling the squish of slight fat that will grow once he’s knocked up.

The omega whimpers at the thought, pussy fluttering in excitement at the idea of his alpha getting him pregnant, his tits swelling with milk for the blond and their pup.

And so - 

“Daddy,” he gasps, rubbing his clit furiously. “Do you wanna get me pregnant?”

The blond immediately groans in surprise, reaching down to wrap his hand around the base of his wet cock on the out-thrust, pulling out for a moment much to Izuku’s anguish, the alpha’s length throbbing angrily in protest to being removed.

“Holy fuck,” Katsuki growls. “Sweetheart, I told you, you can’t just say shit like that. You want me to knot prematurely?”

Izuku giggles, shooing Katsuki’s hand away and wrapping his own smaller hand around the blond’s slick-soaked shaft, guiding him back inside, moaning in delight when the alpha immediately begins to thrust excitedly, clearly eager at the prospect of knocking him up.

“I want you to, though,” Izuku whines sweetly, back to touching his clit. “I wanna have daddy’s babies.”

Katsuki’s face twists up in pleasure, and Izuku nearly screams when the man’s hips pick up speed, the soft plap, plap, plap of their lovemaking growing louder.

Izuku’s head tips back, eyes fluttering shut as he massages his clit fast and rough, his whole body shuddering in delight as he reaches another orgasm, this time squealing as he squirts all over Katsuki’s v-line and the towel beneath him.

“Fuuuuck yeah,” Katsuki moans in appreciation, fucking into his spasming pussy roughly. “That’s so fuckin’ sexy, princess.”

Izuku shivers at the praise, eyes snapping open when Katsuki suddenly pulls out again.

“Wha -,” the omega protests immediately, immediately reaching down to guide the blond back inside again.

Katsuki doesn’t respond, just smirks down at him and grabs him roughly by the hips and thigh, effortlessly flipping him over onto his knees.

Izuku’s eyes cross when the blond bends down to run his tongue slowly through his wet folds a few times, lapping up his slick like an addict.

“You want daddy to breed you?” Katsuki chuckles when he pulls away, stroking his slick-soaked cock languidly as he watches Izuku’s back instinctively arch into a submissive presenting position, knees spread and abused pussy open for breeding. “Good baby, presenting so good.”

The blond grips the omega’s asscheeks possessively, spreading them open just to watch those perky little cheeks jiggle back into place when he lets go.

Izuku drools into the sheets. “Stop teasing!”

Katsuki snorts. “It’s cute how you think you have a say, babydoll.”

Izuku is one hundred percent positive that if it were possible, he’d have hearts dancing in his hooded eyes, his arms wrapping around the pillow that smells the most like Katsuki with a sigh, purring as he rubs his cheek into the expensive silk pillowcase.

Katsuki spanks him, just hard enough to sting, and Izuku moans appreciatively.

“Luckily for you, I’m just as eager to knot this greedy pussy as you are to take it,” Katsuki teases.

“Mmm, c’mon then, old man,” Izuku giggles, popping his hips up impossibly higher. “Scared you can’t keep up?”

“Little shit,” Katsuki grunts, amusement clear in his voice as he moves behind Izuku, sliding his cockhead up and down the slit of those chubby, wet pussy lips, his tone suddenly shifting. “Remember what you promised, princess? You tell me if I do anything you don’t like.”

Izuku’s heart squeezes in adoration, and he turns his head to look back at the man behind him, poised to enter, wondering how the man could ever think that Izuku wouldn’t love anything he gives him. 

“You’re making me feel so good, daddy,” the omega says gently. “I promise.”

Katsuki’s eyes soften, and he bends forward to kiss the back of Izuku’s neck tenderly. “I love you.”

Those words have been said to him a million times from those very lips - but they’ve never held this weight, this meaning, this vulnerability.

And it’s so very easy for Izuku to respond.

“I love you,” the green-haired boy says back, feeling like no truer words have ever left his mouth. “So much.”

He turns his head to the side just enough so that Katsuki can brush their lips together gently, so full of emotion, the blond holding himself up with one strong arm, the other hand cradling Izuku’s cheek, running his fingers so softly on the skin there.

“Now get me pregnant, daddy,” Izuku whispers, nipping at the blond’s bottom lip, their eyes meeting intensely.

Katsuki can’t hold back the rumbling growl from his chest, and he pulls his lips away to position himself behind his omega, knees bent. 

Big, calloused hands grip smooth young hips firmly, and then the blond is mounting, his cock sliding inside easily, the omega’s poor little pussyhole wet and well-fucked.

Izuku moans, loud and hot, because the blond’s cock feels impossibly bigger in this position, and Katsuki doesn’t give him time to adjust this time around, immediately fucking in and out at a steady speed.

The omega grips at the pillow under his cheek, his body being slammed forward with every thrust as Katsuki’s pace steadily grows until he’s absolutely pounding the much smaller body down into the bed with dangerous growls, rough and animalistic, balls slapping up against Izuku’s clit perfectly.

“Oh, o-oh, ahn,” Izuku whimpers, mouth falling open as a steady string of moans and whines of pleasure pour from his lips.

Katsuki’s hands on his hips are rough and bordering on painful, and he uses the grip to yank Izuku’s body back into every punishing thrust, freckled asscheeks jiggling with every hit, and all the omega can do is take it. 

Katsuki stills his hips for a moment with no warning, loosening his grip, and Izuku barely notices for a few seconds, his own hips grinding back and forth, sliding his pussy up and down that thick shaft all on his own.

“Fuck,” Katsuki swears, and Izuku has no time to react before the blond is pumping into him again, somehow even more brutally than before, punching moans and whimpers out of Izuku’s chest every time he slams home, balls deep.

It feels too good, Izuku’s body barely able to process the amount of pleasure he’s experiencing, and for the first time ever - he cums without touching his clit, gasping and whining wetly as he clamps down on Katsuki’s hammering cock, the walls of his pussy squeezing around it.

The alpha growls like a feral animal, one of his hands leaving his omega’s hips to press firmly down on Izuku’s shoulder blades, keeping him pinned to the bed roughly and bending over him more, sliding in to the base and humping shallowly as the boy orgasms, smothering his balls against his pussyhole, enjoying the way that velvet channel massages his shaft, hole fluttering and milking instinctively as he cums.

Once his orgasm subsides, Izuku feels boneless, lower body going lax under Katsuki’s weight, keeping his hips propped up for his alpha to resume his rough pounding, not that he really needs to - he’s sure that if he went down, the blond would simply hold his hips up in place and use his pussy like an onahole.

Izuku cums again just from that thought, sobbing out in overstimulation, feeling the way slick is gushing out of his hole and drooling down his thighs, soaking the towel and bed below. 

And then he feels the base of the alpha’s cock thickening up, slapping against his labia with every thrust.

Izuku’s stomach flutters from both his double orgasm and sudden nerves, because it’s thick, and oh, god, it’s growing even more, until it’s the size of Katsuki’s fist, beating against Izuku’s sensitive hole, demanding to be buried and locked inside this young pussy.

“Oh,” Izuku gasps out, voice quivering, tears pouring down his cheeks. “Oh, that’s gonna break my pussy, daddy.”

“Fuck yeah it is,” Katsuki snarls, sharp canines glinting in the dim light where the morning sun is barely peeking through his blackout curtains. 

The knot feels bigger than the time it was inside Izuku’s mouth, and that time nearly broke his damn jaw - how the hell is he supposed to take that inside his pussy?

His body apparently didn’t get the memo, because he’s desperately pushing himself back into every slam of Katsuki’s hips, the alpha growling and the omega whining as they work with each other.

The knot won’t pop inside and balloon even further until the alpha is ready to cum, but Izuku can feel Katsuki’s thrusts becoming frenzied and sloppy as he reaches his peak.

“Here it comes, babydoll,” Katsuki grits out roughly, finding it in himself to rumble out a soothing croon, holding Izuku down like caught prey as he fucks deep and shallow, intent on getting his knot inside. “Relax for me.”

Izuku squeezes his eyes shut, trusting his body to be able to take what it was made to take, and Katsuki uses the strong, thickly muscled grip on his hip to pull him back roughly one last time at the same time the blond slams his own hips forward, the knot forcing its way inside.

Izuku’s ears are ringing, the world seeming to slow down for just a moment, and when he comes back to, he hears himself screaming, the most intense wave of heat he’s ever felt rolling through his body as his pussy instinctively clamps and seals around the swelling knot greedily, locking it inside, an almost painful orgasm ripped out of him, his whole pussy seizing up.

His screams die down to moans, and he can hear Katsuki’s own groans and growls of pleasure - and then the knot is throbbing in deep pulses, and a hot stream of cum is pumping deep inside, cock buried far enough that it reaches the omega’s cervix in record time.

Nothing will ever top the feeling of Katsuki filling him up like this, Izuku realizes quickly, his entire body humming with fulfillment and pleasure, the blond holding him possessively as he empties his balls in a seemingly never ending load.

Izuku feels swollen and absolutely stuffed by the time Katsuki’s cock twitches and the surge of warmth finally tapers off, another few spurts milked out when Izuku’s greedy pussy squeezes it for more. 

Not a drop trickles out, Katsuki’s knot nice and snug inside, Izuku stretched taut around it, sperm having nowhere to go but his fertile womb.

Katsuki keeps Izuku’s hips angled upwards for a few more minutes, making sure his swimmers penetrate deep before letting out a deeply contented sigh and wrapping one strong arm around his omega’s front, gently maneuvering them to spoon on the bed, knot showing no signs of deflating for another good half an hour or so.

Izuku’s eyes are fighting to stay open, a purr of pure happiness vibrating through his body as Katsuki curls around him, burying his nose in soft green hair.

“Claim me,” Izuku whispers, tilting his neck to the side as Katsuki presses a kiss to his nape.

A broad tongue immediately swipes over his mating gland, and Izuku turns his head to see the way the blond’s canines glisten, claiming venom immediately dripping from his pseudo fangs.

“You want that, baby?” Katsuki asks seriously. “You’re sure?”

Izuku nods firmly - he can wear scent blockers and cover the mark until they’re good and ready to make their relationship public. No one has to smell Katsuki’s claim until it’s time. No one but them.

“I’m more sure about this than anything,” Izuku declares, and Katsuki snorts fondly into his hair. “I love you, and I don’t want anyone else. Not ever.”

The blond rumbles contently. “I love you too, sweetheart. In so many ways.”

Katsuki’s teeth fit around his gland dangerously, and the blond runs a distracting, soothing hand along his hip as he sinks his sharp teeth inside with one smooth press, pumping his potent alpha venom into his neck, staking permanent ownership.

Something in Izuku snaps into place, and his body goes lax in relief.

Alpha claimed him.

The omega hisses and shudders when the teeth withdraw, the blond lapping away the excess blood instinctively.

Izuku feels the bond setting, his body blossoming in euphoria as his inner omega settles for what feels like the first time in his life, content and whole.

“My beautiful omega,” Katsuki murmurs. “Get some rest.”

Izuku doesn’t need to be told twice, his droopy eyes falling shut peacefully, immediately drifting into the most relaxing sleep of his life, Katsuki’s knot still snug and warm inside, strong, safe arms holding him tight.

*

Katsuki is stepping out of his steamy master bathroom and rubbing his hair with a towel when Izuku wakes up, the alpha naked, cock hanging heavy and soft between his thighs. 

“Good afternoon, sleepyhead,” the blond chuckles when he sees Izuku’s blurry eyes open, the older man tossing the towel into his laundry basket.

Izuku stretches, grinning up at his alpha so wide that his cheeks hurt. 

“Cuddles,” the omega demands, realizing that his heat is already subsiding - makes sense, since it was simply a mini-heat outside of his normal cycle that was brought on by being accepted by the alpha his inner omega had chosen.

“Cuddles after you shower,” Katsuki says with a smirk, leaning down to attack Izuku’s neck with ticklish kisses, making his omega squeal, the boy giggling furiously as the blond tickles his sides with his hands.

“You’re mean, daddy,” Izuku whines playfully.

Katsuki groans. “You can’t keep calling me that all the damn time, ‘less you want me to get hard every time you talk to me.”

“Would that be so bad?” Izuku teases.

“Yeah, ‘cuz I’m not in my twenties anymore and you’re gonna end up wearing this poor old man out,” Katsuki jokes mournfully.

“‘Poor old man’ my ass,” Izuku snorts. “‘My poor pussy is sore enough to prove that wrong ten times over.”

“I’ll kiss it better after we cuddle, princess,” Katsuki promises, nipping Izuku’s bottom lip. “Nice and gentle.”

“Mm, yes please,” Izuku sighs dreamily. “Katsuki.”

The name sounds foreign on his tongue, and his face scrunches up. It’s too formal.

The blond stifles a laugh, and Izuku shoots him a glare that quickly devolves into both of them laughing hysterically until Izuku presses their lips together sweetly.

“Cute,” Izuku giggles against his lips, laughing again when Katsuki’s face turns incredulous. “Kacchan!”

The nickname slips out, and Izuku immediately feels warm fuzzies in his belly at the cuteness of it. It feels right. 

“No,” Katsuki grunts. “Absolutely not.”

“Why not, Kacchan?” Izuku sings, running a finger down the blond’s abs towards his v-line. 

“Childish ass nickname,” Katsuki complains, but the pleased rumbling in his chest sells him out. “Some type of shit my friends would call me as a brat.”

“You don’t like it, daddy?” Izuku asks, bratty, shivering when he finally sits up slightly and a massive knot’s worth of cum begins to ooze out of his sore, used pussy.

Katsuki’s cock jumps. “On second thought - Kacchan’s fine, babydoll.”

*

Katsuki delivers on his promise, softly licking Izuku’s sore pussy to the most gentle, relaxing orgasm of his life, wrung out of him by the alpha’s slow, soothing tongue and lips.

Izuku jerks him off using two hands after with the lube from the bedside drawer, the blond showing him just how he likes it - how tight, when to twist his wrists, how deep to stroke him, until his abs are taut and he’s spilling all over the omega’s little hands, head spinning at how fast of a learner his baby is, how eager he is to please as the boy happily licks and sucks his hands clean with a blissed out look on his pretty face. 

Izuku reluctantly swallows the plan B pill Katsuki bought, both of them unhappy but understanding that Izuku is only eighteen - a family can come later, after the omega is out of college and Katsuki is ready to retire. The omega sets an appointment to talk to his gynecologist about getting on birth control after, and that’s that. 

They’re cuddled up on the couch finishing the takeout they’d ordered for dinner, an action movie playing on the living room TV, when Izuku takes a deep, excited breath and spins to face the alpha.

“I’m staying with you,” Izuku says, biting his lip happily when the blond’s brows furrow in confusion. “I’m sorry I didn’t tell you, but… when I was applying to colleges, I, um, applied to the Tokyo School of Tech’s online hero support engineer program.”

“That program has a one percent acceptance rate,” Katsuki says slowly, jaw going slack in shock. “Izu, baby, did you…?”

“I got in,” the omega confirms, preening, and he squeaks when he’s scooped up into big arms and twirled around effortlessly. 

“Holy shit, I’m so fucking proud of you!” Katsuki breathes, pressing their foreheads together lovingly. “But - you’re sure you wanna stay with your old man instead of experiencing the college life?”

Izuku wrinkles his nose. “You mean sweaty frat parties and stuffy dorms? Besides, all my friends are staying around here for their sidekick gigs.”

Katsuki’s hands tighten on his waist momentarily at the mention of frat parties, possessive, before relaxing when his omega kisses him sweetly.

“I was gonna ask you to stay with me, go to one of those colleges around here you got into,” the alpha admits. “But this is so much better, princess.”

Their takeout containers sit out on the coffee table, forgotten, as Izuku is laid prone on their sectional and fucked gently, passionately, Katsuki making love to his little baby in celebration. 

*

Izuku is a few weeks into college, and he doesn’t think he’s ever been more content in his life, tapping his notebook with his pencil as he impatiently waits for his alpha to come home and give him attention.

He’s out of his seat and sprinting for the front door in record speed when the lock turns, and Katsuki is there to catch him when he throws himself into those strong arms.

“Hi, babydoll,” Katsuki chuckles, big hands flexing on his omega’s perky asscheeks when the door closes behind him. 

“Hi, Kacchan,” Izuku purrs, standing on his tippy toes and pulling the blond down a bit to rub the tips of their noses together. 

Their kisses always feel like the most natural, beautiful thing in the world, and it’s no different this time, Katsuki hoisting Izuku up until the boy’s legs wrap around his waist, the alpha walking them to their bedroom for some much needed post-work stress relief.

Izuku is waiting for the blond to return from the bathroom with a towel to clean him up when he’s struck with a sudden bought of nausea, and cum leaking down his leg be damned, he bolts to the bathroom and throws himself at the toilet.

“Woah, shhh,” Katsuki soothes, kneeling down to hold his omega’s hair back and rub his shoulders soothingly. 

Izuku whines, hating the feeling of puking, and leans into Katsuki’s solid body for comfort.

“I knew we shouldn’t have eaten at that damn American place,” the blond grumbles, running his hand through Izuku’s hair.

*

But - it happens again. And again. And again.

After a week of throwing up, Izuku knows that something is up - and he has a very clear suspicion of what exactly is happening, his belly fluttering with excitement and nerves at the prospect.

He’s not dumb.

He stops by the corner store while his alpha is out doing hero stuff, buying a few high-end pregnancy tests, and he paces back and forth at the end of his and Katsuki’s bed as he waits for the results after gracelessly peeing on the sticks.

When he takes a deep breath and marches into the bathroom, heart clenching with hope, every single one of them reads /Pregnant/.

Izuku lets out a laugh, his hand immediately resting on his still flat lower belly, tears welling up in his eyes because - there’s a little human in there, half him and half Kacchan.

They’ve talked about this before, briefly, when they’re cuddling after sex and kissing lazily, talking about life.

He knows that Katsuki eventually wants to start a family with him, knows that he wants to wait until he retires and they can go public with their relationship before he gets him pregnant, but - he instinctively knows that the blond won’t be mad. Hopefully. It’s not uncommon for young omegas to stay with their parents when they get pregnant, and the world will be none the wiser regarding the baby’s father until the couple is ready to reveal the truth.

Izuku feels giddy, unable to stop looking at his belly in the mirror all day, barely getting any school work done as he devises a way to tell his Kacchan the good news.

He cooks a nice, big dinner, making sure it’s spicy enough to kill a small elephant, just the way the blond likes, and throws one of the alpha’s big shirts on along with his favorite pair of panties, humming to himself contently.

His phone chimes, and he bites his lip with a grin.

Daddy🧡: /On my way home, princess/

Daddy🧡: /I got your favorite ice cream/

Daddy🧡: /stupid fuckin store finally restocked it/

Izuku gasps.

Me: /Mega All Might Chocolate Chip Attack?!?/

Daddy🧡: /that one/

Daddy🧡: /Jesus Christ/

Katsuki walks through the door twenty minutes later, and the blond is on Izuku in a heartbeat when the omega chirps a happy greeting, setting the bag of ice cream on the kitchen counter and sliding behind Izuku where he’s cooking, resting his head on the omega’s shoulder.

It’s a perfect parallel to a few months ago in the kitchen, but this time, there is no unresolved sexual tension and holding back, Izuku tilting his neck to the side for Katsuki to press loving kisses to the skin there.

“Holy fuck, whatever that is smells fuckin’ great, princess,” Katsuki murmurs, kneading his hips and tilting Izuku’s head to the side to capture his lips for a slow kiss.

“Thank you, daddy,” Izuku purrs, nuzzling back into Katsuki’s broad chest.

“Fuck, baby,” Katsuki groans, and Izuku feels the alpha hardening against his ass. “You’re a little devil.”

“You’re gonna have to get used to being called daddy all the time again,” Izuku says casually, sauteing Katsuki’s favorite vegetables over the stove. 

“Mm, why’s that?” Katsuki rumbles, fitting his teeth around the top of Izuku’s ear and nipping gently. 

Izuku moans and giggles at the feeling, setting the skillet on the stove and turning around to face the blond, resting his hands on the alpha’s chest and playing with the man’s hoodie strings.

Izuku bites his lip, because - even though he’s been looking forward to this all day and has convinced himself that Katsuki will be happy, perhaps a tiny bit upset but getting over it quickly, he’s not so sure now that they’re face to face.

Oh god, what if Katsuki is angry? What if he - 

Izuku doesn’t even realize he’s hyperventilating until Katsuki cups his cheek in concern, wiping away the tears that are suddenly rolling down his cheek with a soothing croon. 

“Shh, baby,” Katsuki murmurs, wrapping him up in his arms. “I’m right here. What’s wrong?”

“You’re g-gonna h-hate me!” Izuku hiccups, burying his face as deep into the warmth of his alpha as he can, inhaling stuttering breaths of his comforting scent.

“You could murder people and I wouldn’t hate you,” Katsuki chuckles, rubbing his back soothingly. “Just be a bit disappointed.”

“Just a bit?” Izuku giggles wetly, sniffling softly.

“Mmhm,” Katsuki hums with a wiggle of his brows, wrapping his hands around Izuku’s waist and lifting him up onto the marble countertop, turning the stovetop to low under the veggies. “Now tell me what’s wrong, my precious little babydoll who I’d burn the world down for. Who do I need to kill?”

Izuku flicks his chest. “And you call me a nerd!”

“I haven’t called you a nerd in at least two days,” Katsuki protests, kissing and nipping at his chin with a playful growl.

Izuku chews his lip nervously, deciding to use actions instead of fumbling over his words - he grabs one of Katsuki’s hands with his own shaking ones, and places the big, warm palm over his taut belly.

“Someone who’s not me is going to be calling you daddy real soon,” Izuku says quietly, ripping the bandaid off.

Katsuki luckily doesn’t do anything cliche like go as still as a statue or refuse to answer for minutes - instead, he rapidly looks up and down between his palm on Izuku’s belly and the omega’s worried face.

“Wha -?” Katsuki starts, mouth gaping open and closed repeatedly like a fish out of water. “Baby - are you - are you - ?”

The blond’s eyes are welling up with tears, and the most genuine smile Izuku has ever seen on the man’s handsome face appears. 

“I’m pregnant,” Izuku confirms, his own cheeks aching from how hard he’s grinning at his alpha’s smile.

Katsuki somehow smiles even harder, letting out a giddy whoop of joy as he pulls Izuku to his feet and drops down to his knees, both hands gently, oh so tenderly, resting on his belly, thumbs running soothingly over the skin.

“Oh my god,” Katsuki says in this obnoxious baby-talk voice that has Izuku giggling sweetly.

The blond is still smiling as he leans forward to pepper his omega’s belly in kisses, blowing raspberries into the skin there and leaving his little mate shrieking with laughter as he tries to push his head away.

Katsuki holds him still with a strong arm wrapped around his ass.

The blond rubs his nose back and forth along his belly lovingly. “Hi there, my little peanut.”

Izuku runs his fingers through Katsuki’s thick hair, purring down at the sight of his big, strong alpha talking to and kissing his belly with hearts in his eyes.

*

The gynecologist confirms that Izuku is about 10 weeks along - meaning that Katsuki most likely knocked him up the very first time they had sex.

No one bats an eye at the blond accompanying him to his first ultrasound, the techs cooing over what a sweet dad he is, coming to his son’s appointment with him.

The couple share a heated smirk - oh, Katsuki’s a sweet dad alright. 

They get a bit too touchy just to make the doctors and techs uncomfortable, Katsuki resting a possessive hand much too high on Izuku’s thigh as he sits in the alpha’s lap in a short sundress. 

The pregnancy goes by relatively smoothly - Izuku is able to stay home, finishing his college work and occasionally hanging out with his friends when he feels up for being away from Katsuki or his scent for a few hours, which is proving to be an extremely rare occurrence.

His friends hound him about the pregnancy, begging to know who the sire is, but Izuku just bats his doe eyes and tells them it’s an alpha they’ve never met.

Katsuki tells his mom and close friends, mainly because they’d eventually find out either way - Kiri claps him on the shoulder and congratulates him on becoming a grandpa (ha), and Mitsuki nearly faints at the idea of being a great-grandmother (double ha). 

Katsuki doesn’t find it in himself to make a snarky comment about how she’s actually just going to be a grandmother, biologically this time, because that would actually send the old bat to the hospital.

He just watches with smug eyes as Mitsuki coos over her step-grandson’s tiny swell.

Katsuki’s bed has been transformed into a massive nest consisting of tons of blankets, pillows, sweatshirts, and squishy stuffed animals that Izuku had begged the blond to buy (not that it took much, the simp).

All the green-haired boy really wants to do is sleep and fuck, napping on and off most days until Katsuki gets home and dicks him down until he’s a purring puddle of pliant omega.

Katsuki becomes obsessed with his belly when it begins to swell, the blond stepping up from the role of scarily overprotective to terrifyingly overprotective in the span of a few weeks, worrying his ass off when Izuku so much as steps out of the house.

Daddy🧡: /does your back hurt??/

Daddy🧡: /You were just rubbing it/

Daddy🧡: /I’ll give you a nice long massage when I get home/

Izuku rolls his eyes fondly, making sure to stick his tongue out at the doorbell camera when he walks back inside after checking the mail.

Me: /I’m fineeeee!!/

Me: /… eat me out first? (*^^*)♡/

Daddy🧡: /of course, my babydoll/

Izuku sighs happily, leaning back on the couch when Katsuki gets home a few hours later and doesn’t hesitate to drop to his knees between Izuku’s legs, throwing his legs over his shoulders and pulling his panties to the side, obediently licking into his pussy just like he’d asked.

The blond is beyond whipped, sitting Izuku between his legs and massaging his shoulders and back for nearly an hour afterwards while they watch the new episode of their favorite drama.

And then he gets to be a complete pillow princess, Katsuki arranging him on his side so gently before pressing inside and fucking him like he’s made of glass.

Izuku’s inner omega is obsessed with the treatment, feeling so spoiled and loved and taken care of, and the green-haired man isn’t quite sure how he got so lucky to have the alpha as his daddy.

“I love you so much it hurts,” he whispers into his pillow that night with a soft smile, Katsuki’s arms wrapped around him like a koala as the blond snores loudly. 

*

“I’m not quite sure how your previous tech missed it,” their current tech says, baffled. “You’re carrying twins, Izuku, I m-mean - Mr. Bakugou.”

Izuku gasps, and Katsuki can’t hold back a wild grin, even as his eyes widen in shock.

“Looks like they’re fraternal,” the tech continues. “Hmm - looks like one alpha boy and one alpha girl!”

“Told you they’d be an alpha,” Katsuki says to Izuku, smug, their tech widening his eyes at the way the alpha nuzzles his face into the omega’s neck.

“There’s two!” Izuku shouts, staring at the sonogram, gaping.

“You must be real fertile, princess,” Katsuki murmurs, his eyes flickering to the tech who’s blushing furiously now, clearing his throat awkwardly.

“M-Mr. Bakugou, Dynamight, s-sir,” the tech stammers.  “Y-your son being with twins does indeed imply that he is most likely more f-fertile than average.”

“Mm,” Katsuki hums noncommittaly, snaking a hand around Izuku’s waist and rubbing his thumb over the little sliver of skin between the boy’s shirt and leggings.

The tech gulps shallowly, watching them with greedy eyes.

“What are you looking at?” Katsuki grunts, just to be mean. “You some type of pervert, watching a man comfort his son?”

“I m-meant no disrespect, sir!” The young alpha nearly screeches, adjusting his pants in a way that he thinks is subtle. “Just - h-happy that he has such a supportive father!”

“I do have a great daddy,” Izuku agrees, still staring at the screen in awe.

The tech nearly shudders at the omega’s sweet voice.

Katsuki lets up, feeling a bit bad for striking the fear of god into this boy’s heart, but not bad enough that he doesn’t accept Izuku giving him a highway handy on the way home, his sports car’s windows tinted enough to basically be dark mirrors. 

*

Izuku feels like an absolute beach ball by month six, and he’s also on the verge of losing his sanity, because Katsuki is now beyond terrifyingly overprotective and stepping into the realm of horrifyingly overprotective.

He’d gently pushed Izuku behind him and absolutely obliterated a tiny rock with an explosion when the omega had nearly tripped over it on their way to the car, being caught by a strong arm before he fell forward.

And now -

“Call me if anything happens, okay?” Katsuki murmurs, stress and worry rolling from his body in waves. “I did the math, I can be home in approximately 4.6 minutes if I turbo from the hotel -,”

Izuku presses a single finger to Katsuki’s lips. “I’ll be okay, alpha,” he coos. “I promise.”

“I don’t have to go,” Katsuki grumbles petulantly. “I don’t want to go, sweetheart. Don’t wanna leave you alone.”

“Like I’ve said at least a hundred times now,” Izuku says patiently. “Go. It’s just for one night. You never miss the Tokyo Hero Convention!”

“Only because PR practically forces me to go every year,” Katsuki whines, plastering on his pleading eyes that Izuku can usually never deny. “I’ll tell them no this year, princess, I’m the number one goddamn hero. I have pull.”

“You’re going,” Izuku says firmly, crossing his arms. “And you’re not gonna worry about me.”

“That’s impossible, sweetness,” Katsuki sighs, pressing his lips to the omega’s forehead. “Please, babydoll? We’ll go look at Christmas lights and drink hot cocoa all weekend, make gingerbread houses and cookies -,”

“We’re doing that next weekend!” Izuku laughs, moaning softly and eyes fluttering shut when Katsuki’s lips meet his own. 

They make out for a few minutes, Izuku wrapping his arms around the blond’s neck until the bigger man picks him up.

The omega can feel Katsuki’s erection growing under his ass where he has his legs wrapped around the alpha’s waist, and he shivers in excitement as they move towards the bedroom -

“Nope,” Izuku says, pulling away with a gasp. “You’re gonna be late! You’re trying to distract me, you ass!”

“Goddamnit,” Katsuki groans.

*

Katsuki is laying his head on the omega’s chest in their bed about a month later, Izuku’s fingers running through blond hair when it happens for the first time - the alpha’s nostrils flare, immediately shoving his face into Izuku’s chest to huff at the sweet, sudden scent.

“K-Kacchan!” Izuku squeaks, Katsuki’s nose tickling him. “What the -?”

The blond doesn’t grace him with an answer, just shoves the omega’s shirt up to his neck like a demanding toddler looking to be fed.

“Shit, princess,” Katsuki groans, and Izuku’s nipples begin to ache at his tone, and he looks down just in time to see droplets of milk forming at the tip of each one. 

His chest has been sore and full for the past few weeks, his body preparing to feed two hungry babies, and it looks like his alpha’s nightly chest and nipple massages have been paying off, finally coaxing him to begin lactating.

“They’re not even due for another two months!” Izuku complains, nipples sensitive and chest aching as a small stream of comforting-smelling milk begins to pour from one.

“God, you’re sexy,” Katsuki murmurs, groping both breasts with a gentle squeeze, both nipples spraying milk much to Izuku’s horror, whining when the droplets that land on Katsuki’s lips are immediately licked up. “Tastes fucking amazing, sweetheart.”

Izuku covers his burning face, gasping when Katsuki pinches both nipples just to be an asshole, rubbing the nubs with the pads of his fingers soothingly after.

“They’re so sore,” Izuku whines. “Ughhh, I’m gonna have to start pumping!”

He eyes Katsuki, watching for the man’s reaction, because although Izuku has fantasized plenty about nursing his alpha, he’s not positive they’re on the same page regarding that particular kink - but the way the man is staring at his chest hungrily, licking his lips for any remnants, he has a good feeling that they are.

“Fuck that,” the blond grunts, sounding genuinely offended. “I’ve got a perfectly good mouth right here.”

“Wha - ?” Izuku squeaks, heart jumping to his throat in excitement.

Izuku doesn’t think he can blush any harder when the blond smirks up at him flirtatiously, keeping his sharp eyes on his omega’s face as he leans forward and takes one of those sensitive nipples into his mouth and sucks.

“A-ah,” Izuku moans, eyes fluttering closed in pleasure when some of the pressure in his chest is finally, blessedly, relieved. 

One of his small arms wraps around Katsuki’s broad shoulders, effectively cradling him, and the alpha groans at the taste of sweet, sweet milk on his tongue, swallowing greedily as his eyes close in bliss.

Katsuki gets a bit too excited at one point, nursing a bit too roughly, forcing a soft whimper from Izuku’s lips - the older man pulling off to lick over the sore nipple soothingly in apology.

Izuku’s face burns, guiding the blond to latch onto his other nipple once the first is drained, the omega’s free hand reaching down to pull Katsuki’s hardening cock from his sweats, stroking him as he suckles sweetly.

The alpha finishes after a good twenty minutes of his shaft being massaged, throbbing and releasing a healthy load, Izuku gently milking him through it.

Izuku smiles down at his mate’s relaxed face as he continues nursing while dozing off, the omega pulling his book from the bedside table and humming softly as he reads, free hand gently curled around the back of Katsuki’s head to keep him on his meal. 

*

Month nine hits, and Izuku feels like his hips are about to give out at any given moment, his stomach comically large compared to the rest of him and his entire body sore and tender.

He’s nearing the end of his second semester in college, and he’s exhausted from growing two big, healthy babies and studying his ass off for his engineering classes.

Katsuki had tried to convince him to take a semester off until their pups are born, but Izuku had gotten a determined look on his face and shot that down, even though the idea of a gap semester sounds fucking amazing right about now.

Maybe he’ll think about it. Maybe . Damn Kacchan, being right all the time.

“Your pups are completely healthy,” Dr. Shuzenji, a nurse turned obstetrician from Katsuki’s time at UA, assures him. “We’ll give them a week to make an appearance, and then we’ll discuss induction if needed.”

Izuku nods nervously, and Katsuki squeezes his hand encouragingly as they walk out of the office - or waddle, in Izuku’s case, until Katsuki scoops him up bridal style and walks him the rest of the way to the car.

It’s a big, black SUV this time, brand new and added to Katsuku’s collection of sleek sports cars and bikes and classic muscle cars just a few weeks ago - perfect for a growing family.

The blond deposits him gently in the back seat, the heavily pregnant omega preferring to be able to splay out across the seats in the back due to his massive belly - Katsuki is all too pleased with that particular development, preferring his babydoll and pups stay as safe as possible.

Katsuki drives them home like an absolute grandpa, eyes watching the road like a hawk, consistently staying ten miles under the speed limit.

“Hurry uppp,” Izuku whines. “I gotta peeeee!”

Katsuki snorts. “I told you to pee before we left the office, sweetheart.”

“These are your demon spawns torturing my bladder!” Izuku gasps dramatically. “Therefore, it’s your fault that I have to pee, so hurry!”

Katsuki laughs, and Izuku bites his lip to prevent himself from joining in, because he’s very much mad at Kacchan right now for turning him into a walking watermelon, thank you very much. 

… That notion is thrown out the window when Katsuki eats him out and ever so gently fucks him later that night, mouth servicing his aching, leaking tits.

*

The labor, thank fuck, doesn’t begin while Katsuki is out working - instead, Izuku wakes with a whine, a puddle of wetness forming under him and and the blond. 

“K-Kacchan,” the omega warbles, nerves hitting him like a ton of bricks as soon as he realizes what’s going on.

Katsuki is up in an instant, unwrapping his arms from around his little mate and immediately letting out the most soothing rumble Izuku has ever heard - his body instantly relaxes as Katsuki quickly changes out of his wet boxers and into a pair of grey sweats, throwing on a white shirt in less than a heartbeat.

“I’m gonna get your clean clothes all wet,” Izuku whimpers in embarrassment when Katsuki grabs his labor bag from their closet scoops him up. 

“You think I fucking care?” Katsuki asks incredulously. “Babydoll, you should know better by now.”

Izuku’s chest swells, his arms wrapping around Katsuki’s neck as the alpha carries him to the car, the omega biting his lip to stop from apologizing about ruining the still new-car smelling upholstery. 

They make it to the hospital in a few minutes, and the time seems to pass in a blur until suddenly, the two of them are sitting in a delivery room, Katsuki sitting next to his bed in a shitty hospital recliner, rubbing his thumb over the back of Izuku’s hand lovingly.

Katsuki’s phone is blowing up with congratulations on becoming a grandfather after he’d messaged Kiri, his second in command, letting him know he wouldn’t be into the agency tomorrow because Izuku is in labor, and the bigmouth had excitedly spilled the news.

Katsuki just smirks down at his phone, because boy, are they in for a shock in a few years. He feels a bit bad about keeping the truth from his friends, but he knows they wouldn’t understand.

The redhead is his best friend, and he knows he would eventually come around, but - all Katsuki really cares about is spending the rest of his life raising his (hopefully many) pups with his perfect omega.

Dr. Shuzenji is in within the hour, checking Izuku’s dilation and giving them a rough estimate of how long it’ll be until their pups are in their arms. The omega is nearly vibrating with nerves and excitement, eager to finally snuggle his babies.

“We made these,” Izuku whispers, low enough so that no one else can hear, squeezing his mate’s hand lovingly and rubbing his belly with the other. “Half me and half Kacchan. Wow.”

Katsuki squeezes his hand right back, grinning at his beautiful omega before kissing his temple tenderly. “You did all the work, really, babydoll.”

*

Even with the epidural given around 5 centimeters dilated, the pressure is still a lot for Izuku to handle. Tears are pouring down his cheeks as he pushes, and Katsuki has never felt more horrible than he does right now, because he did this , even as his heart pounds with excitement.

All the blond can do is bend over his mate, rumbling deep from his chest as he kisses his cheeks and runs gentle fingers through his hair.

“First pup is crowning!” Dr. Shuzenji calls encouragingly, and Izuku pushes with a cry of effort, and then -

The first baby’s airways are cleared, and the most beautiful, beautiful sound either parent has ever heard pierces their ears as the pup begins to wail.

Izuku is smiling widely through his tears, face twisting up in pain again as the second baby begins to make its entrance into the world.

“First one is the boy,” Dr. Shuzenji murmurs, and Izuku nods fervently, thankful for the distraction as he begins pushing again. “You’re doing great!”

The second baby comes out slightly easier than the first, and an all-encompassing relief washes over the omega when the second baby cries, both of them having absolutely no complications, big and healthy and crying for their mama.

“Grandpa’s genes are strong!” One of the nurses coos, placing both babies gently on Izuku’s chest, and the omega sniffles with an uncontrollable grin, cradling both of them as the nurse leads them to latch on and eat for the first time. 

They both have tufts of blond hair and big, green eyes - a perfect combination of their parents, and Izuku has never felt his chest burst with as much love as he’s experiencing right now as the pups nurse and grumble hungrily, and one look at Katsuki tells him he’s feeling the same way.

*

Katsuki’s mom and friends all make the same joke when Izuku isn’t around - about how the omega must’ve picked a blond, just like his daddy. 

Katsuki just laughs every time, because of how damn close they are to the truth, unknowingly.

*

Izuku reaches a comfortable tempo that allows him to both raise his babies and work on finishing college, dropping down to a part-time course load while they’re super young.

No one bats an eye at the fact that he’s still ‘living at home’, much like he expected, and although his inner omega is growing a bit antsy at the fact that it’s still hidden that he and Katsuki are mated, he knows that the blond is planning on retiring in the next few years, so it won’t be long before the truth is finally out and he can relax knowing he’s no longer a ‘secret’. For now, he understands, and knows that Katsuki is far from ashamed of him - the alpha proves that to him everyday.

Katsuki makes sure his omega doesn’t go stir-crazy by taking him out to dinner, the mall, or on trips as often as he can, leaving their pups with Mitsuki, or Kiri and Mina and their teenage kids.

Izuku still makes time to hang out with his friends, but he always finds his social meter running out faster these days, eager to get home to his alpha and babies.

*

Katsuki never thought that this type of domestic bliss would come for him - but here it is. Coming home every night to his wonderful mate and happy babies, the three of them all too happy to cuddle up in his arms on the couch as they watch movies, the two adults talking about their days and babbling down at their pups who spittle happily.

Izuku never thought that the at-home life would suit him so well, and he’s already planning on starting his own line of tech gear with the help of Kacchan’s pro hero money as soon as he graduates, hundreds of notebooks filled to the brim with ideas and designs, a corner of their garage cleared out to be the omega’s workshop until they eventually move when the older man retires.

The pups grow fast, too fast, and soon enough, Izuku finds himself recording video after video of Katsuki carefully spoon-feeding them their first food, the babies slapping their chubby thighs happily as their parents cheer them on.

The blond has to deal with the cold shoulder when both pup’s first words are ‘paaa!’, but Izuku comes around quickly, still rolling his eyes fondly when the babies repeat it over and over again.

*

Two years later:

“Kacchan!!!” Izuku shouts angrily from the bathroom, where he’d snuck off to pee on a stick, a sense of deja vu washing over him when he’d begun to get nauseous a few days ago. 

He’d even switched from oral birth control to an IUD after the pups were born, but it seems his body is just too weak for his Kacchan (he totally gets it). Their sex life has remained amazing and (a bit too) active, much to both of their delights, but it looks like they hit one too many creampies.

Katsuki pops into the bathroom, two feral blond toddlers hanging off his shoulders, their daughter nearly growling as she gnaws at his ear. “What’s up, babydoll?”

Izuku waves the stick around in the air, and Katsuki immediately darts, twins squealing as they hang on for the ride, yelling “faster, papa!”

Luckily, the little tykes have taken to calling Katsuki ‘papa’, and so it’s never been a problem when they’re all hanging out with friends and family - only Izuku, Katsuki, and their kids knowing that the word means dad, not grandpa, and everyone referring to the blond as the kids’ papa due to the name. 

‘Daddy’ remains Izuku’s dirty little secret, and the couple is more than happy to abuse that fact in bed.

Izuku sighs contently a few weeks later, his belly not yet swelling with their newly conceived pup, popping out of his train of thought when Kiri screams as their daughter, Akane, bites his leg, and their son, Keiji, laughs and points.

They got their personalities from their papa, unfortunately (fortunately).

*

The little omega girl comes out looking exactly like Izuku, green hair and freckles and all, spare the bright red eyes. 

That still doesn’t raise any suspicions amongst the people who know Katsuki isn’t Izuku’s biological father, but the blond can feel his mother’s burning gaze on him whenever they go visit, like she’s catching on.

He doesn’t mention it when the woman begins to ‘mistakenly’ refer to herself as “grandma” instead of “great-grandma” when it’s just him and Izuku around - it just makes the upcoming reveal a lot easier, now that she knows.

*

Their fourth pup, another alpha boy, is born a few weeks before both Katsuki’s retirement and Izuku’s graduation.

His hair is a lovely mix of green and blond, and he’s heterochromic - one green eye and one red, and the couple share a glance of relief that they don’t have to hide their relationship for much longer, because this one would be… a bit difficult to explain. Mitsuki doesn’t even comment on it, the goddamn detective cooing at the newborn lovingly.

They’ve been house-hunting for months, and Izuku had instantly fallen in love with a massive cottage on the quiet countryside, nestled near the mountains and the ocean - Katsuki had bought it, paid in full, the very next day, after melting at the way his omega’s eyes had lit up when they toured the property.

Izuku, in all his pregnant glory, had ridden his cock in gratitude to the point of it nearly falling off, so the blond chalked it up as an expense well worth it.

They move in the day after Katsuki’s retirement with the help of their friends, and the sleep that night is the best they’ve ever experienced - all four of their pups tucked in and dozing peacefully in their new rooms, the couple crawling into bed and tangling up in each other before crashing immediately.

The announcement comes in the form of a video posted to Katsuki’s pro hero instagram, the couple cozying up on camera and explaining the situation - and then the two of them put their phones on ‘do not disturb’ for the foreseeable future and relax, Izuku nursing their two youngest and cuddling under Katsuki’s arm, his inner omega glowing at the fact that it’s now known who he belongs to (who belongs to him), while their twins cuddle up on their dad’s lap, eating popcorn and watching a movie. 

*

When they decide to finally check their phones a few weeks later, they go through and compare the most dramatic texts, laughing to each other hysterically.

It doesn’t matter now - Katsuki’s records and good deeds are forever sealed in the history books, and won’t be removed, because while their situation is a bit… shocking, it’s completely legal, as their lawyer had informed them. Izuku was a consenting adult when they began their relationship, and they’re not related by blood, as proven to the public via blood test. And, as it turns out - Inko had never actually put Katsuki’s name on the birth certificate, and the blond had never known simply because the thing was buried deep in his closet somewhere, untouched since her passing. And since the alpha had never adopted Izuku after Inko passed, thinking he was on the certificate this whole time -

Izuku was never technically his son, and that makes things about a thousand times easier. 

As expected, Mitsuki already knew, and Katsuki and Izuku’s friends are more than surprised and a bit horrified (except Ochako, who simply says Get it! I knew you wanted that dick this whole time! in response), but eventually come around after giving themselves a few months to recuperate, admitting that they’re just happy that the couple is happy, especially after seeing how in love they are. 

The hype around the “shocking” news dies down surprisingly quickly - new, more exciting scandals and pro hero drama comes out every day, and Katsuki hires an anonymous source to remove as many articles, government and medical files, and posts regarding both Izuku being his son and the “revelation” as possible, simply so that their pups don’t find out the truth from the internet instead of them when they’re old enough to hear it. As corrupt as it is - it works astoundingly well, and only a few traces of the truth remain online, new articles and posts being quickly polished from the internet thereafter, and no one cares quite enough to notice. The blond also deletes all of his pro hero social media, just like he’s always planned to do after retirement, even if he’d never fallen in love with Izuku.

And then, because he does nothing by halves, Katsuki spends a few months hunting down someone with an event-altering quirk until he finally catches a lead - a woman in Brazil. She’s banned from using her quirk, for obvious reasons, but the blond uses his generous money to ‘convince’ the authorities to unlock her quirk-canceling collar and look away just this once - the alpha woman is more than happy to wave her hand for the right price, and just like that, everyone besides Mitsuki and a handful of their trusted friends forgets that Katsuki ever had a ‘son’ named Izuku, the few bits of info left lingering on the internet quickly deleted in confusion. 

True, it would’ve saved them a lot of grief to have found the woman earlier, but - it all turned out perfect in the end, and Katsuki much prefers it this way, because he was able to wholeheartedly prove to Izuku that he was never ashamed of his love for him. If it weren’t for the fact that their kids would’ve had to grow up and learn the taboo truth, Katsuki wouldn’t have changed a damn thing - everything he does is for them, really.

Now, the only “hot gossip” their children will ever have to see regarding their parents’ relationship is the age gap, and the fact that Izuku had conceived the twins right after turning eighteen when Katsuki was forty-one. 

The couple has an August wedding, right on the beach that sits below the mountainside that their cottage is on, everyone crying happy tears when they exchange I do’s.

Izuku rapidly establishes a name for himself in the tech community after graduation, building some of the cleanest and most advanced pieces of gear the world has ever seen - right from the huge workshop Katsuki had built him on their property. It’s not long before the top heroes from every country are vying for his equipment.

Post-retirement, Katsuki finds himself falling back into his old passion of cooking, starting anonymous social media accounts to showcase his talent. He gains a huge following, everyone curious as to who this phenomenal chef is, a few thirst accounts for his hands popping up (Izuku is annoyed, but admits that his alpha has sexy hands). When Katsuki reveals his identity as retired pro hero Dynamight, his following increases tenfold.

Izuku is pregnant with another set of twins shortly after, identical this time, omega boys born with matching little heart-shaped birthmarks on their arms, and it’s not a secret this time.

The couple posts a single photo to be shared with the public, the two of them kissing lovingly as they cradle their newborns between them, the tiny boys sleeping peacefully.

Katsuki never thought that the domestic, perfect, happy family life would ever come for him, indeed. 

But it did, and it’s the best thing that’s ever happened to him.