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Katsuki stares at the floor of his bedroom, corner of his eyes stinging as he refuses to blink. Worried he’ll miss something, anxious that part of the summon may be wrong. The orange flame emitting from the mass of candles in front of him coats him in a foreboding light. The fire dances over the sharp metal of the knife in his hand. It twitches in his grip, the light threatening to blind him from the reflection.
A photo-copied sheet from one of his parent’s old summoning books rests on the floor next to him. The printer was almost out of ink, making the letters faded and repeated across the paper. The appearance, and the fact that the script is written entirely in Latin, makes everything feel even more ridiculous. Still, that doesn’t change the fact that Katsuki is committed to the insane situation he’s putting himself into.
He’s 25 years old and about to attempt to summon a demon so he can finally lose his virginity. There has to be a more normal way to do this. Hell, he couldn’t just, fuck, go on a dating app and make his status ‘FUCK NOW!’ or some shit?
No, he knows that’s not a possibility. He’s a virgin for a reason. He doesn’t feel comfortable putting himself out there and having to break whatever sexual tension that was building with a ‘By the way, I don’t have a dick. If that bothers you, kill yourself.’ That hostility, apparently, isn’t a great way to get laid.
Maybe it would’ve been easier if Katsuki liked girls too, but no. He just has to be gay, and the amount of gay men that would rather eat shit than eat out a cunt makes him want to crawl out of his skin.
There’s definitely a dating site out there for people like him—trans people who just want to hook-up with other trans people without having to deal with all the nitty gritty aspects of saying what’s in their pants. It’s the normal, sane thing to do to get his dick wet.
Instead, he took Denki’s stupid fucking joke seriously.
Katsuki is just tired of everything. The teasing from his friends for still being a virgin. The expectations that’ll be placed on him if he actually did meet up with someone. The awkward aftermath. Being that vulnerable in front of someone whose first name he probably will never know.
So, when Denki said he should just summon an incubus to get it done and over with instead of seeking someone out, Katsuki is ashamed to admit that a light bulb went off in his head.
The ghostly other side with phantoms, monsters, and demons isn’t something he’s unfamiliar with. His parents are both well known mediums. He’s been dealing with specters since he was a kid. None ever really messed with him. The amount of amulets his parents made him wear as a precaution made sure of that.
Said amulets now sit in a box stuffed in the back of his closet so he doesn’t have to worry about them affecting the ceremony. His parents will kill him if they ever find out about this. Summoning a demon is basically the biggest No-No he could do. There’s a million things that could go wrong. He could summon one more powerful than intended. One could just pretend to be an incubus to trick him into giving up his soul or possession of his body.
There is no part of this that screams ‘good idea’, but Katsuki is picking up the paper to read off the summoning chant anyway.
His Latin isn’t the best. It’s been a few years since he’s properly studied it and his pronunciation could be better. Still, considering the flames of the candles before him begin to grow in size and glow green instead of orange, he figures it’s working well enough.
As he reads off the final sentence of the summoning, the knife suddenly gains weight in his palm. He’s unsure if it’s a result of his own overthinking, or if power has imbued itself into the object. Still, Katsuki doesn’t hesitate. He raises the knife, grits his teeth, and slashes a gash into his other palm. He bites his bottom lip between his teeth to keep from crying out.
It’s as though he slashed himself with hot iron. He half expects his blood to bubble from the cut, boiling as it leaves him and drips onto the summoning sheet. It appears normal. Blood falling steadily from the wound and soaking into the piece of paper. When the words become completely illegible, he tosses the parchment into the green fire.
Katsuki intently watches as the flames flicker and rise higher. They lick against the ceiling, threatening to ignite his apartment complex. That’d be fucking embarrassing—having to explain to the police and firefighters why he had ten extra large candles balanced against each other in the middle of his floor.
The increased heat has sweat forming along his temple and the back of his neck. It falls down his skin, chill compared to the warm blood that continues to leak across his palm. Katsuki can feel his heart in his throat, the sickness from nerves and anticipation swirling in his stomach.
A hand reaching out of the flames almost causes that sickness to spill out. He wills himself to keep back his anxious nausea as his eye locks onto the being entering his room.
Reaching out isn’t actually the right way to describe the action as it takes place. Fingers force their way through the flames and pull the fire to the side. Slowly, as if breaking out of a cocoon. The demon makes it seem as though the fire is tangible; as if, where it would burn Katsuki’s skin, the demon could simply rip a hole through the center and twist it to his desire.
Katsuki’s breathing is bordering on hyperventilation. The heat in the air does little to help the fire in his lungs. He can’t tell if he’s excited, scared, or just amazed.
It fucking worked. There’s something slowly forcing itself out of the green flames and stepping into Katsuki’s bedroom. He’s either about to have the best orgasam of his life, or he’s about to be murdered. Solid 50/50 chance.
Katsuki’s eyes widen as more of the demon emerges from the fire. His arms are bare with jagged scars slashed all over the skin. They vary in sizes, all illuminated a bright red from the green flames. The outfit appears to be a dark leather, tight to his figure with a heart cut out over his chest. A pointed tail flicks out and wraps around his thigh; a classic whip sounding as it slashes against the air. Katsuki startles and jumps back. He slams against the edge of his bed with enough force to knock the remaining air out of his lungs.
He braces himself for a slash—eyes screwed shut and his uninjured hand raised in a fist. His eyes peek open after a few seconds of silence. The tail doesn’t hit him. He’s unharmed save for the self-inflicted gash in his left palm. The blood appears to be streaming even quicker from the wound, almost spurting out of the opening with the harsh beat of his heart. Katsuki presses it against his sweats to finally attempt to stop the bleeding.
The blood quickly soaks into the fabric, warm and sticky as it slides down over his inner thigh. Katsuki flicks his eyes back up, forcing himself to ignore the spinning in his head to fully take in the sight of the demon.
He’s still making his way out of the portal, head tilted down as he watches his bare foot step onto the hardwood. A mess of dark green curls sits on top of his head, and large, twirling horns like that of a ram protrude out. When he finally looks up, Katsuki is left captivated by his eyes.
Bright green irises, flickering the same hue as the fire he stands in. Large, white pupils are locked onto Katsuki’s face. There’s a scar that cuts down the length of his right cheek and he has a…pleasant smile on his lips?
When both of his feet are finally on the ground of Katsuki’s bedroom, the fire from the candles flickers one last time before it’s snuffed out with another crack of the whip that is the demon’s tail. The room is left in darkness aside from the full moon that’s illuminated through the window.
The space is deathly quiet—only Katsuki’s breathing and the steady tick of the clock above his bed make any sound. Even the usual night life is silent through the crack of the open window. The fiend continues to stare at Katsuki, who still sits on the ground—eyes blown wide with his jaw threatening to drop.
He is shorter than Katsuki was expecting, probably just a few inches smaller than himself; though the bulk of muscle on his body makes up for any height he may be lacking. As expected of an incubus, the leather body suit leaves little to the imagination. Katsuki’s eyes rake up and down the demon’s form.
The top of the outfit is cropped—opening in the center and fanning out towards his hips. A steady trail of hair begins below his navel and disappears beneath the tight leather pants. Katsuki can’t make out a noticeable bulge in the dark with the black pants, but he’s already preparing to call out of his afternoon shift tomorrow if this entire situation goes how he’s hoping.
“Hi!”
The happy greeting has Katsuki’s gaze snapping back up. His voice is as kind as his smile. Even the way his hand waves reminds Katsuki of Mina when she’s a happy drunk. The blonde raises an eyebrow and keeps his hands at his side.
He can’t tell if the bleeding has begun to stop. There’s too much blood soaked into his sweats and sticking to his skin. Katsuki is unsure if the fuzziness in his head is from the lack of blood or if the demon released something into the air.
It must be the latter, as Katsuki doesn’t believe he has the ability to even look away. He’s fully bewitched by the demon before him. He isn’t sure what he was expecting to come out of the flames, but it wasn’t this. A being who looks like sunshine incarnate who was banished to hell for shining brighter than the angels.
Katsuki’s throat is dry. His tongue feels like it’s made of cotton and sticking to the inside of his mouth. He attempts to swallow and almost chokes on the muscle. Still, he manages to rasp out a hesitant, “Hi?”
The demon rolls his eyes and crosses his arms under his chest. His pecs push against the leather, the muscle slightly pressing past the heart cut out. There’s no hair on his chest, just freckles and a few smaller scars. Veins on his forearms bulge from the movement. The muscles of his biceps are defined under the large scar that takes up the expanse of the demon’s right arm.
He had always expected incubi to be visually flawless beings. Clear and unblemished skin, perfectly styled hair, faces and bodies that he would see on the covers of magazines.
This demon is everything but that, yet Katsuki has never seen a more beautiful being in his life. The teasing voice from the demon breaks him out of his daze of admiration.
“Oh come on, you summoned me, didn’t you? Stop acting so surprised.”
Katsuki feels his eye twitch. His voice is just as beautiful as the rest of him, but of course there had to be a downside.
“Okay, asshole. You’re just different than what I was expecting.”
“Well, aren't you sweet?”
“Old ladies think I’m charming.”
The demon huffs, a smirk forming on his lips as his eyes darken. With his first step forward, Katsuki feels the heat from the earlier flames return in his gut. He can’t tell if he’s turned on by the way the demon carries himself, or if his body is screaming at him to run. He doesn’t get the chance to figure it out before the demon stops just before him. Bending at his knees, he tilts his head to the side while keeping that same, light smile on his face.
From this lack of distance, Katsuki can make out the map of freckles that are painted across the demon’s face. Four large beauty marks sit on his left cheek. The expanse of skin beneath is littered with freckles of various sizes and shades. Katsuki wonders if the demon knows how many mark his skin. If anyone has counted. If Katsuki would be the first to try.
“You got a name, Prince Charming?”
Katsuki attempts another swallow. Every bit of him feels like it’s burning. He swears he’s never heard his heart so loud in his ears. The harsh, steady pulsing behind his navel has him shifting. There’s no room for him to move his legs. His only option is to pull his knees closer to his chest, but that will push his cunt even closer to the grey fabric of his sweats. He can already feel how wet he’s become from just being under the gaze of the incubus. Whether that’s a direct result of the demon’s power or Katsuki is simply that turned on by his looks, he’s unaware.
When the demon quirks an eyebrow, he realizes he still needs to give an answer to the question that was asked. Even if he summoned a literal incubus into his room, he’ll at least make his parents proud by not being a complete idiot.
“Kacchan.”
“You’re smart, aren’t you Kacchan? Knowing better than to give a demon your real name.”
“I know a thing or two. Not my first time dealing with you guys.”
The demon reaches a hand forward. The long nail of his pointer finger traces along Katsuki’s jaw. There’s barely any pressure at all, but Katsuki can feel the sharp sting as blood begins to gather at the opening of the cut. Still, he doesn’t move. Still, he holds the demon’s gaze. He tilts his head up into the nail and bares his throat. Why he is going so far to tempt a demon who could so easily rip his esophagus out before he could even blink, he’s unsure. Katsuki has stopped attempting to make sense of the situation he’s created for himself.
Glowing, emerald eyes flicker down to stare at his throat, at the swallow he forces down and the vein that must be pulsing along his jugular. The demon’s forked tongue darts over his bottom lip before leaning his head forward. Their bodies finally touch at the knees, the freezing body of the demon causing Katsuki to jolt in surprise. The pointed nail pushes into his skin once again, bringing another trickle of blood down his jaw.
“But it’s your first time summoning one to fuck you, right? So desperate to lose your virginity that you call on an incubus?”
Katsuki feels his ears burn, the blush quickly engulfing his entire face. “How’d you know I’m–”
“You’re a loud thinker, Kacchan, and your blood smells so sweet I can already feel a cavity forming in my molar. I’ll ignore the fact that I can hear your second heart beat so you can save some face, okay?”
“You’re an ass.”
The demon finally leans away as he laughs. It’s a beautiful, windchime sound that is out of place for the setting. Katsuki watches in awe as the demon clutches his stomach and wipes a tear from his eye. He continues to beam at him, pure joy unfiltered on his face.
“I really like you, Kacchan! I think we’re going to have a lot of fun!”
Katsuki’s bottom lip quivers. He’s unsure of the expression it wants to pull his face into. Relief? An anxious frown? An excited smile? He bites it between his teeth to stop it from moving.
The demon’s eyes are focused on the action, the glow of his irises darkening as Katsuki nips at a chapped corner and causes a bead of blood to rise to the surface. It’s as though the air around them has become stagnant. It presses against Katsuki’s body, causes his wounds to sting and has him focus on the stickiness of his palm that’s more or less glued to his thigh.
“Do I get to know your name before you fuck me, demon? Or am I just gonna call you ‘Freckles’?”
The demon chuffs another small laugh. He continues to smile, amused. “I do have a name. Not that I’ll tell you. Same reason you won’t be telling me yours.”
“So Freckles it is, then?”
“While that is very cute, no. You can call me Deku.”
Katsuki’s expression sours. A being like this, albeit sinful, is not befitting of a name like that. “Deku? The fuck kind of name is that?”
“The kind you get when you have to fight your way up from the deepest pits of the inferno.”
From the way Deku’s jaw tightens, Katsuki knows better than to press forward. It doesn’t matter, anyways. Deku is a demon. Katsuki is a human. There’s no need for him to be concerned about this demon’s past. They’ll never see each other again after tonight. Katsuki will be amazed if he even remembers that Deku is a demon when he wakes up.
He’s read up enough about it. Most likely, Katsuki will just remember this as a drunken hook up. His memory of Deku’s appearance will be warped—as if attempting to look through stained glass. Katsuki doubts he’ll be able to recall the way Deku’s pupils pulse with each beat of his heart or the way his canines dip so slightly past his lip. He ignores the way his heart constricts at the thought.
It must just be a side effect of whatever Deku is doing to him. He’s just a demon. An impromptu summon for Katsuki to get laid. It doesn’t matter if he remembers the details of who his first fuck is with.
The stickiness of the blood on his palm has begun to dry and harden uncomfortably against his skin. There’s still a trickle of crimson dripping from his jaw, staining the collar of his shirt. Even if his memories become corrupted, there’s no way he could forget the crisp smell of iron or the scar carved into him.
“Okay Deku, where do we go from here?”
Deku hums and leans forward once again. His voice is deeper than before, sultry and tempting against Katsuki’s ears. “You still owe me something, Kacchan.”
For the first time since Deku emerged from the flame, fear passes through Katsuki’s chest. He didn’t see anything about needing to offer something after the summon. The blood from the paper and energy the incubus should get from his body as they fuck should be enough. He’s not about to give up his soul just to get his dick wet. He does his best to keep his fear from showing in his voice.
“The fucking summon wasn’t enough?”
Another fleeting laugh. Another stir in Katsuki’s gut and strain on his heart that makes his breath catch. “You sure this isn’t your first time dealing with demons?”
“If you’re going to ask for my soul or some shit you can fuck right back off into the fire–”
“It’s nothing that serious, Kacchan. I just need your blood. Just a bit.”
Deku tilts his head and makes a small pinching motion with his thumb and pointer. His smile is kind, his eyes crinkling along with it.
Katsuki should know better. He could still call it off—banish Deku back to hell and move on like this never happened. The possibility of saying no, of denying the demon of such a simple want, isn’t one that Katsuki entertains.
Wincing from the pain, Katsuki pulls his wounded hand off his sweats. The bleeding has stopped, but the blood has caked over the entire space of his palm. He raises it towards the demon before him. Katsuki feels himself shrink under such a powerful gaze. So deeply vulnerable, laying his blood and body bare before a demon to consume. He hopes the wetness between his legs isn’t noticeable through his grey sweats.“...Have at it.”
Deku’s touch is gentle—carressing Katsuki’s hand with his own as he raises it up to his lips. Just before they touch the wound, a small smirk pulls across them. “Oh, and just so you know, my saliva works as an aphrodisiac.”
There was no way Katsuki could have prepared himself for the next moment. Even as Deku’s forked tongue tentatively licks at the wound, he feels a shudder rake over his entire body. He can only watch as he willingly offers his blood to the demon, and how enthusiastically it is accepted.
The forked tongue splits down the middle—two lengths of the muscle lapping at the caked blood on Katsuki’s skin. It should be disgusting to watch, disgusting to feel the tongue wrap around his fingers and lick over an open wound. Katsuki only feels the heart beat between his legs pulse faster.
It’s erotic, the way his digits are stroked with the tongue. There’s a deep flush across Deku’s face. Drool drips from the corners of his mouth. When his eyes finally open again, dazed and hooded as he looks down at Katsuki, the glowing white of his pupils have turned into hearts.
There’s no more dried blood on his palm, just wet with spit that should have him gagging. A fresh stream of crimson has begun to rise to the opening after being licked and prodded at. Deku puts his mouth directly over the slit and sucks at it greedily.
This should be painful. Katsuki should be wincing and crying and doing his damndest to pull his hand away. The grip on his wrist is feather light. He’s not trapped despite how his situation may seem. He could free himself. Put a pause on his offering to catch his breath. He drops his free hand between his legs instead.
His cock has never ached like this before. His cunt is clenching around nothing and begging for attention to be given to it. He palms at himself through his sweats, a moan tearing itself from his throat. The wetness sticks to his fingers through the fabric. Katsuki bucks his hips, desperate to chase any sort of friction as his mind clouds over and every nerve of his body ignites.
The tongue on his palm stops moving, causing Katsuki to whine at the loss of stimulation. He wants to be embarrassed by it. He shouldn’t be the one getting off on his wound being eaten out. Katsuki is just a normal human—hell, the kinkiest thing he’s ever done is stick a pinky in his ass and he’d immediately decided he’d never do it again.
Now, on the night he’s about to lose his virginity to a literal demon from hell, he finds himself becoming addicted to the feeling of blood leaving his body as it’s drained by someone else.
Something else.
This aphrodisiac has to be corrupting him. Rewiring his mind, his cells, his complete chemical makeup. Twisting everything. He manages to rest his head back against the edge of the bed and look up at Deku. The white hearts in his eyes have grown in size. There’s an enchanted look on his features, as if he’s utterly entranced by Katsuki’s movements.
A splash of blood is speckled across his cheek. It must have been from when the demon pressed himself so close to Katsuki’s palm. He probably doesn’t even realize it’s there. So dazed in his own blood lust to realize he’s smeared it over himself.
Katsuki tentatively leans into his space. It feels like his heart is going to break out of his chest or fall out of his cunt. Every beat vibrates through his limbs to the tips of his fingers and down to his toes. He’s probably shaking. He can’t be sure. He’s too focused on the smell of iron from Deku’s mouth as their breath mingles from the lack of distance.
Katsuki acts without reason, closing the distance to lick at his own blood that stains Deku’s cheek. He can feel the way the demon stills, how the grip on his wrist tightens and the tips of the pointed nails pierce into his skin.
It tastes how he expected. There’s nothing special about it. Nothing that should drive Deku to this point of ecstasy, at least by human standards. Still, Katsuki finds the urge to play into it. Pulling back, he holds Deku’s gaze. The white hearts pulse as he studies him, breath hitching.
“You’re right.” Katsuki’s voice is raspy with lust, each syllable scratching against his throat. When Deku tilts his head in confusion at the statement, he continues, “It’s sweet.”
A harsh pull on Katsuki’s left wrist has him falling forward, only to be caught by Deku’s lips on his. Sharp teeth nip at his bottom lip, quickly filling both of their mouths with the sweetness. A rough, jagged hand grips into his hair to keep him right where Deku wants.
Katsuki can barely breathe. His nose is pressed into the demon’s cheek. The forked tongue is licking his teeth and pushing down his throat. It almost feels like he’s choking as his own tongue is massaged on all sides. He doesn’t even realize he’s being picked up until his legs are hanging off of the bed.
Deku pulls his tongue out and mouth off in a fluid motion, a loud smack in the air around them as Katsuki takes a deep inhale of breath. He feels his world spin. His body is so hot he wouldn’t be surprised if he burns through the comforter and the mattress beneath him erupts into flames.
Somehow, he manages to push himself up onto his elbows. A stray tear drips from the corner of his eye—his vision is glossed over as he attempts to look between his legs. Deku is kneeling before him, hands clasped in a mock of a prayer as he mumbles something Katsuki can’t make out.
“I thought you didn’t worship a God, Deku. Who are you praying to?”
Deku keeps his eyes shut and tightens the grip of his hands. “I am willing myself not to eat you whole, Kacchan.”
“The deal was just some of my blood.”
“I am well aware. Hence the willing. I–I’ve never tasted a human as–as delectable as you. I’m worried I’ll become addicted. Go against orders to visit you in the night and watch from the shadows. See how you sleep unguarded. Invade your dreams and pull those gorgeous whines from you as you rest.”
Deku keeps his eyes screwed tight the entire time he rambles. As if looking at Katsuki directly would crack whatever remaining resolve he has left.
Katsuki has seen many instances of the paranormal throughout his life thanks to his parents. Heard disembodied whispers. Phantom touches on the back of his neck. Shadows that warp and twist just out of his field of vision. But he’s never dealt with a demon directly until tonight. He’s been warned, time and time again, by his parents to keep himself safe. They never allowed him to accompany an exorcism, or visit a demonic haunting even after he was an adult.
It’s been ingrained in his head how terrifying demons are, how wary he should be. To never trust one or state any personal information aloud. And never, ever, invite a demon into his life in any way. And certainly never allow their blood to mix.
Even now with his muddled mind, he knows better. He should know better. Though nothing in his life could have prepared him for the sight before him.
Tears, illuminated by the moon, fall in waves down Deku’s cheeks. His bottom lip is trembling as he continues his mumbles under his breath. Blood is dripping down his hands from where his nails have stabbed into himself. He’s doing everything in his power to keep himself controlled. Keep the mental distance between them, have Katsuki forget him when this night is through.
Katsuki’s legs are spread across the mattress, his shins hanging off the bed and caging Deku in on both sides. With the way the demon’s head is lowered to his fist, the tears and blood pooling on the floor, and the chanting Katsuki can’t make out, it’s as though he’s been laid upon an altar. His sole devotee being a scarred, useless incubus.
Katsuki sits the rest of the way up and almost falls forward from the way the world spins around him. He catches himself just barely, his right hand gripping into the sheets as his left rests over Deku’s fist. He can feel the blood still falling from the cut. He sees it smear over the demon’s hand, mingling with the streams from his stab wounds.
The warnings from his parents ring an alarm in his mind, but he can’t find the will to pay attention. His fists tighten instead. He pushes forward, eyes attempting to grab the gaze of Deku’s.
There’s a new burning in his palm, one that should make Katsuki pull away with a jolt, as if he’s placed his hand on scalding metal. He half expects his skin to bubble and blister from the fire that roars inside him.
He doesn’t move. He can’t. Not when Deku has finally opened his eyes. His pupils, those gorgeous, blinding white hearts that stay in Katsuki’s vision even as he blinks. Tears continue to bubble over his lash line. His trembling lips attempt to form words and fail. There’s barely a breath of space between them—their noses almost brushing as Katsuki whispers.
“And if I want you to?”
“To what?”
“Devour me. Live between my legs. Visit me in the night. What then?”
Deku only continues to stare into him. A flush, deeper than before, engulfs the demon’s face like a rising flame. He keeps his voice low, but the fluster in his words is clear.
“S-Shouldn’t I fuck you first before you make such a life altering decision?!”
Katsuki shrugs and raises his other hand to poke at Deku’s forehead. The demon lets himself be pushed, his chin raising to look even further up at Katsuki. It’s difficult to believe that a being this malleable is one meant to be feared. A fiend born in flames and agony so easily falling to Katsuki’s touch.
“You’re the one stalling, Deku. What kind of incubus keeps a man waiting?”
“I fear I won’t be able to stop once I begin.”
“So don’t.”
“You…Kacchan, are you sure this isn’t your first time dealing with demons? You have zero self preservation skills.”
Katsuki only smirks and takes hold of Deku’s chin, “You talk a lot, you know that?”
“I’ve been told.”
“So shut up and put that tongue to better use.”
The white hearts in Deku’s eyes grow impossibly larger. Katsuki can barely make out the green of his irises. It’s just that glowing white pulse hypnotizing him. He wouldn’t be surprised if his own pupils had turned into hearts of their own.
He finally pulls himself away, elbows falling back to the bed as he spreads his legs further. Katsuki doesn’t speak—doesn’t need to. The order is as loud as the pulse that beats behind his navel.
Deku’s hands unclasp from each other. There’s a slick, unsettling noise as his nails retract back into his fingers. They rest, almost weightless, against Katsuki’s thighs. He makes no resistance as he’s pushed further open.
There’s no attempt to remove his sweats properly. Deku grips the waistband and tears the fabric to both sides. It splits easily, only staying stuck on Katsuki’s inner thigh where his blood had dried.
The chill air against his aching cock leaves him gasping. He can see how red it is even in the dark, how it’s twitching beneath the tuft of hair that he decided to shave into a heart as a joke. To fit the mood of the night, he had laughed to himself, back when there was still a part of him that believed the summoning wouldn’t even work.
He’s so wet he can smell himself, practically taste it in the air as he breathes. The sheets are beginning to dampen beneath him and he hasn’t even been touched past his initial palming.
Katsuki can’t tell if he’s shaking from how hard his heart is beating, or if Deku is trembling from the anticipation. Maybe it’s both.
The demon is slow in his approach—dragging Katsuki further to the edge of the bed as he leans forward. Deku’s breath is warm, burning against his cunt as he stays just out of reach. It’s like he’s enthralled by Katsuki’s soaking sex and doesn’t know where to begin.
It starts small. Just a lazy drag of the forked tongue around Katsuki’s cock to test the waters. Katsuki releases a noise so filthy, he doesn’t even recognize his voice as his own. His hands fist the blankets as he continues to watch the sin unfold between his legs.
Like before, the tongue splits down the middle. Katsuki feels each side of the muscle twisting around his swollen hood. They’re careful strokes, clearly focused more on drawing broken gasps from Katsuki’s throat than trying to pull him to a climax.
It’s impossible for him to look away from how focused Deku is on him. His eyes are barely open, white heart pupils continuing to pulse under his lashes. He looks feverish with lust, his skin flushed with beads of sweat forming on his temple. He’s locked on Katsuki’s face—guaging every reaction, every noise. Cataloging every tremble of his limbs and hitch in his breath.
As one length of tongue dips through Katsuki’s folds to prod at his hole, his arms finally give out.
He falls roughly back onto the bed, the grip on his thighs now tightening as the demon pushes his face closer. His cunt is being stroked so gently—inspected and felt up with such delicacy that Katsuki feels he might explode.
Of course he’s imagined how it might feel for someone to go down on him. He’s watched countless videos, even attempted to find a toy that could mimic what it might feel like before he gave up out of embarrassment. Nothing would have been able to prepare him for this.
It’s overwhelming. Intoxicating. It will be impossible to ever mimic the feeling of two tentacle-like tongues spreading him open and drinking in everything that pours out of him. He bucks his hips weakly in Deku’s hold, doing his best to get closer, feel more, feel everything as his arousal climbs to impossible heights.
It crashes all at once when the parted tongue pushes its way inside of him. The flicked tip, circling his cervix as the other wraps around his cock and pulls, sends squirt arching out of him. He feels the release, the open dam that soaks over his thighs and pools into the sheets beneath him. Every part of him trembles, his breathing failing him as the attention on his cunt doesn’t let up.
The tongue inside him is not pushed out. The grip around his cock does not loosen. They move separately from one another in speed and intensity. There’s no point in Katsuki attempting to focus on one instead of the other.
It’s just pleasure. Nerve boiling, core burning pleasure that borders on endless. His body hasn’t been able to build to another climax, as it was never given the option to fall after the first. There must be a splash of squirt with each pulse of his heart as he feels the tongue inside him thicken and thrust.
Weak curses blubber past his lips as he cries from the overstimulation. He can feel Deku’s tongue pushing against his stomach. There’s no telling how thick he made it form inside Katsuki’s cunt. He’s never felt so full. It’s not solid thrusts being fucked into him like he would have expected—like he actually prepped for. That four inch glass dildo could barely count for an opening act.
Deku’s tongue squirms in and out of him. It bends and folds against itself, knocking against his walls and never giving Katsuki a moment of rest. He never wants it to end. He won’t be able to go a moment awake or asleep without remembering how this feels. The ecstasy that’s seared itself into every molecule of his body.
He’s unsure how much time passes while he’s stuck in this state. He’s long past the point of being able to hear the clicking of the clock on the wall or attempt to keep count in his own head.
Broken pleas begin to fall in rapid succession as the tongues on and inside him pick up their pace. His hands scramble for any sort of leverage, only to fall flat against the blankets. There’s no strength in his limbs as he is dragged further away from his mortal form and ascends into a realm of bliss no human should ever be able to experience.
Katsuki’s scream is silent and trapped in the back of his throat as he comes, his vision blackening from the surge of adrenaline that leaves his body. Faintly, he can feel the tongue inside him decrease in size. The tongue on his cock unwinds and falls away. Open mouth kisses are left on his inner thigh, small sucks over the areas that must still be stained with blood.
Each breath shakes his entire body. If it wasn’t for the steady grip still placed on his thighs, he’s certain he would have floated off the bed. Deku’s voice sounds like it’s underwater. Distant and warped as Katsuki attempts to re-establish himself in reality.
“...acchan? Kacchan, can you hear me? Kacchan!”
Katsuki groans and attempts to roll over and stuff his face into the mattress. The grip on his legs only tightens. It’s difficult for him to reply. He can feel the rasp in his throat before he even attempts to speak.
“Shuddup, Deku. Hear ya just fine.”
“Oh good! I thought you passed out!”
“Nuh uh.”
A soft, amused laugh tickles against his inner thigh. Katsuki is suddenly reminded that his soaking cunt is still out and directly in front of Deku’s face. Even though his arms feel like they weigh a ton, he still manages to pull them over his torso and rest his hands over his crotch. He attempts to close his legs as well, but Deku immediately puts a stop to it.
Katsuki glares up at the demon who is now standing between his legs with a giddy smile. Squirt still drips from his chin. His hair is even flattened at the sides from how wet his face has become. Katsuki can feel the heat that rages on his ears at the sight.
Deku only plays into it. His hands slide down Katsuki’s thighs and rest on his waist; thumbs resting just above his navel as he pushes up his shirt. The pressure on his stomach is light, but it only makes Katsuki’s head spin. Still, he holds the gaze of the demon and doesn’t allow himself to lose this prolonged staring contest.
“Suddenly all shy? C’mon, Kacchan.”
The sudden drop in Deku’s voice has Katsuki turning his face away. He raises his hand to push up the demon’s chin in hopes of getting just a moment to himself to breathe.
“Not wanting my dick in your face while I’m still catching my bearings makes me shy?”
“Kinda.”
Groaning, Katsuki kicks Deku in the waist to get him to release his grip and attempts to sit up. The demon raises his hands, defeated, and stands back. The fluids of their endeavor makes Katsuki shiver as the chill splashes against his still burning cunt. He grimaces and shifts in his seat.
“Gross. Sex is gross.”
“Kinda!”
“And you do this everyday?”
“Sometimes multiple times a day! Depends how much I’m willing to get summoned.”
“Wait, you can decide if someone will summon you or not? You’re not just, like, pulled through the fire?”
Deku’s eyes grow fond, the white hearts in his eyes decreasing in size. They still pulse to the beat of his own heart. There’s a flush on his skin that isn’t just from their previous exertion. “Oh Kacchan, you’re so cute.”
“Blow me.”
“I just did—ow!” Katsuki kicks him hard in the hip. The amused smile on Deku’s face shifts to a pathetic pout. With the way the fiend’s horns fall on the side of his head and the large eyes that stare down at him, he reminds Katsuki more of a puppy than a demon. He holds back his lip that threatens to twitch into a grin.
Deku’s eyes glance down to his lips, his own pout changing to a smile as he continues, “But yeah, I’m ranking high enough now to decide. I usually just go to the ones I think I’ll have the most fun with.”
“So you knew it was me who summoned you before you even got here?”
“Mhm. You made me really excited! I rarely get to see humans like me!”
“Like you?”
“Oh right!”
Deku suddenly reaches for the waistband of his pants. He undoes the leather tie and pushes the clothing down. Katsuki’s eyes widen once the cock under the tuft of green hair is revealed.
It’s just like his, only double the size. Thick at the base where it pushes past his folds. The tip twitching and swollen from his own arousal. Katsuki immediately feels his own ache between his legs the longer he stares at it.
“Holy shit. They can get that big?”
“Demon perks.”
“Could you…you know.”
“Fuck with it?
Katsuki nods, eyes still fixated on Deku’s cock.
“Wanna find out?”
Katsuki’s eyes shoot up, an excited smile growing on his face as he reaches up and grabs the demon by his neck. He pulls him down into a kiss of teeth, both of them smiling too large in order for their lips to meet properly.
Deku clumsily pushes his pants down the rest of the way, cursing at the tight leather. Katsuki’s light laughter fills the space between them as he struggles. For a being that’s meant to be some highly ranked underworld demon, there are so many aspects of him that scream otherwise.
The way he giggles back into the kiss. The way his hands hold Katsuki’s face like he’s the most precious being in the world. It’s too kind for a demon. Sex aside, Katsuki has never felt such a strong connection to someone like this in his entire life. This intense need to be as close as possible, fall into each other’s skin and live under the flesh.
That scalding heat from his palm has made it to every part of him now. There’s not a piece of his body that hasn’t been tattooed with the memory of Deku and their night together.
To limit it to just one night doesn’t feel correct, though. As Katsuki wraps his arms around Deku’s neck and pulls him against his chest, it’s as though centuries of memories are passed between them.
Scenes pass in his head of both of them as infants. Katsuki chews on the end of Deku’s tail as he attempts to crawl away.
As children, Deku cries as he complains about the itchiness of the horns that are beginning to poke past his hair. Katsuki calls him a baby, but scratches at the base of them to offer some relief.
As teenagers, Katsuki is chased through a forest, wind biting at his cheeks as he ducks behind a tree to hide. Deku jumps out of the shadows and cages him, beginning a victory speech that is interrupted by Katsuki’s crashing their lips together.
They never should have met before tonight, but Katsuki swears he does not know a life without the demon who is currently positioning himself between his legs. He should probably focus more on why he’s suddenly recalling these memories. Even as dazed as he is, Katsuki is still aware of that. But he’s too focused on the movements of Deku above him. There’s more pressing issues for him to focus on than some sudden recollections.
The hands on Katsuki’s face leave to grip his thighs and fold him in half, knees now resting on either side of his chest. The white, heart pupils of the demon’s eyes begin to pulse again as Deku lines their cocks up against one another. A whimper escapes Katsuki’s throat before he can stop it.
He already knew of the size difference. Was well aware that Deku’s own dick is double the length and girth of his. Feeling it pressing against his cock is something else entirely. Katsuki can only lay, pinned by the knees, as Deku grinds their cocks together.
Their combined wetness squelches between them with each movement. He can feel his cunt throbbing from inside, begging to be filled once again as Deku continues to frot their cocks together.
That all too familiar build starts once again in Katsuki’s core. He looks up, vision once again blurred by tears and his own arousal fogging his mind.
“Deku…Deku–”
“Soak me, Kacchan. I know you’ve got more left in you.”
Katsuki’s legs shake against him as he comes, squirt bubbling up between their frotting cocks as Deku continues to move. The tears in his eyes finally push past his lash lines. They don’t get the chance to stain his cheeks again, as Deku’s tongue is on him and licking up the salty stream. He speaks softly, despite the still frantic movements of his hips.
“You’re such a pretty crier, Kacchan.”
Being complimented so sweetly in such an otherwise dirty situation has further blush spreading across Katsuki’s face. He hides his burning cheeks behind his forearm and looks up at Deku with hooded eyes.
Another set of tears is already dripping down the fiend’s face from his own overstimulation. The moonlight leaking in through the window leaves a glowing blue hue around his figure. He’s ethereal. Even as his pointed tail flicks behind him, Katsuki is convinced he’s more angel than demon.
A name, distant and beautiful, begins to repeat in the back of his mind. It pushes past the insult of Deku. A name similar, but more fitting. Something Katsuki can’t believe he ever forgot.
He reaches up and takes the fiend’s face into his hands. He’s long since gone numb to the ache in his left palm. Pressing it against his cheek, Katsuki smiles as blood falls down his arm and soaks into his shirt.
“You–hah–too.”
“Hm?”
“You’re pretty, Izuku.”
Both of them still after the name is spoken. Izuku’s eyes widen and hearts shift back into normal circles as he pulls away from Katsuki. There’s an ache in Katsuki’s chest, a deep burning sensation the further Izuku’s face gets from him.
He attempts to bring his hands back to his side, only for his left wrist to be grabbed. Izuku studies his palm, mouth moving silently as he tries to figure out the situation. He bites the inside of his cheek and takes a breath before turning to look under him.
“Bakugou Katsuki.”
Katsuki nods, his own mouth forming a tight line. “Midoriya Izuku.”
Izuku turns Katsuki’s palm to face him. Glowing, green marks spread out from the opening of his cut and bleed out into the rest of his hand. Pointed tips going as far as dipping past his wrist. With each beat of his heart, the glow pulses throughout each strand on his skin.
When his parents first told him about this, it prompted him to steal the books from the library to learn more about it as a teenager. It’s something that, while rare, has been documented enough for there to be a recorded history. It accompanied the warnings he has been given in regards to demons his entire life.
His parent’s warnings echo in his head as his eyes flicker between his palm and Izuku’s worried expression.
Be wary of demons. Never try to summon one. Never give a demon your true name. Never trust a thing a demon says. If you are injured around one, never, ever, allow their blood to enter your wound.
His parents are still alive, but somehow Katsuki can see them rolling over in their grave.
“My blood got into your cut.”
“And that means we’re–”
“Bonded. Blood bonded. You and me.”
Katsuki screws his eyes shut and curses under his breath. Not only has he gone against just about every warning his parents have ever told him in a single night, he’s made it that he’ll need to tell them about this night. Humiliation and shame burn in his chest.
“My parents are going to fucking kill me.”
“So you know what this means?”
Katsuki nods, still keeping his eyes shut. “You won’t be able to stomach any blood besides mine. I will need a dose of yours regularly so I don’t become sick and die. We’re each other's blood bags until I kick the bucket.”
“You’re also going to stop aging. So.”
“I’m essentially a fucking vampire now, aren’t I? Fucking great.”
“Vampires aren’t real, Kacchan.”
Finally opening his eyes again, Katsuki glares up at the man on top of him. “Not now.”
“Sorry.” Izuku drops his wrist and begins to pull at his own hands. A nervous sweat is gathering along his temple as his pupils shake. His voice matches the warriness of them. “I… I can undo it. If you want.”
“What’s the catch?”
“What?”
“If you undo it, what happens?”
Izuku chews on the inside of his cheek. “You’ll forget me. This entire night will just vanish from your memories. Same goes for me. We’ll be completely removed from each other’s minds.”
So that’s where the myth comes from. People who had accidentally bonded with a demon having their memories wiped to undo it. Katsuki doesn’t want to be another addition to the myth. He can’t forget this. Even if his entire life has changed, he never wants it to go back to the way it was just a few hours earlier.
“So, I forget you, and then what? I do the summon again and you show up. This entire night happens again. With no memories we do the exact same thing and the bond happens all over again. Then what?”
“Kacchan—“
“Izuku. I… fuck, I don’t want to forget you!” The sudden rise in his voice causes the fiend to startle, but he still stays situated between Katsuki’s legs. Katsuki himself sits up and takes Izuku’s hands into his. His grip borders on bruising, but Izuku shows no signs of discomfort. “I don’t care if you’re a demon and my parents are going to kick my ass. I can’t blame the way I feel sick at the thought of forgetting you on this aphrodisiac. It’s like my entire life has just been filler before you showed up.
“I’ve never felt this understood, even if we’ve done more fucking than talking. I want to learn everything about you. Don’t force me to forget what I already know.”
His chest heaves after his small monologue. He can feel his heart beating through his entire body as he holds eye contact with Izuku. White pupils still weary, now glossing over as a wave of tears bubble to his lash line. His mouth twitches, a smile threatening form that he won’t allow to give way.
“Kacchan… Are you sure about this?”
“Even if you undid the bond, there’s no way I could fully forget you. I’ll be haunted by the phantom of your memory for the rest of my life.”
A blinding smile is shown to him. It causes Izuku’s eyes to crease and canines to dip past his lip from the pure joy of it all. Katsuki is helpless to mirror it.
“Now, how am I ever supposed to say no to that?”
Their lips meet before Katsuki can say anything in response. He feels his world spin as he’s pushed back onto the bed—a laugh cut off by a moan when Izuku rubs his cock between his folds. It feels larger than before. Thicker as it threatens to spear him open and press into Katsuki’s waiting cunt.
“You–You realize this makes you mine forever, right Kacchan?”
“Hah…you don’t have to keep using that stupid nickname, Izuku.”
“No, I think I will. Everyone else can know you as Bakugou Katsuki, but you’ll only ever be Kacchan to me. My special name for my special boy.”
“Izuku—fuck!”
Without warning, Izuku pushes himself inside. Even if his cock is shorter than his tongue, it’s still girthy enough to knock the air out of his lungs. His hole aches on both sides from the stretch, the tip reaching just deep enough to rub against his g-spot.
He wraps his legs around Izuku’s waist and pulls him impossibly closer, barely even giving him the ability to thrust from how tight he holds the grip. Rough hands find his waist once again. His hips are raised off the bed for Izuku to get a better angle, thrusting in deep, quick strokes.
Katsuki can barely form a coherent thought. His mind is too empty as pleasure begins to override his senses once again. It was one thing to be fucked by Izuku’s tongue; to have his insides prodded and filled completely by the muscle. That was overwhelming in its own right.
But Izuku’s cock connects with him completely, locking their bodies together as he takes in every expression on Katsuki’s face, every broken moan and whine that manages to fall from his lips. Even through his foggy vision, Katsuki can see the hearts that glow in Izuku’s eyes, can see how entranced he is by Katsuki’s vulnerability.
Back arched off the bed. Hands gripping the sheets as he rolls his hips into the thrusts. His forgotten shirt has gathered around his neck; his pecs and scars visible to the demon above. Tears once again fall from the corner of his eyes, pooling at the side of his head as he runs towards another release.
“So pretty, Kacchan. So–hah–perfect. I wish you could feel how wet you are.”
“Shut–hnng–up, Izuku.”
“Can’t. I have to tell you. You need to know. You can’t come without knowing how beautiful you are, Kacchan.”
Izuku runs his right hand down Katsuki’s exposed torso. It stops right above his chest, thumb massaging into the nipple graft before pinching it between his fingers. The harshness leaves Katsuki screaming as stars dance behind his eyelids.
The coiling, burning heat in his gut has become all too familiar to him after tonight. It pulses through his entire body. Winding tighter and tighter behind his navel until it runs out of rope.
His nipple continues to be played with between Izuku’s fingers, the pleasure-pain causing any coherent thought to fully leave his mind. Katsuki knows nothing else besides the feeling of his body, the cock that’s fucking into him, and the mumbling praise of the fiend whose carving a home for himself in his cunt.
“I never want to pull out, Kacchan. Kacchan you’re so perfect, so wet and tight I can barely think. You’ve saved this for me, didn’t you? Spent your whole life untouched just so a demon could taint you?”
Katsuki can only nod in agreement, body too blissed to allow himself to feel any humiliation.
“Perfect. So perfect. And now you’re mine forever, yeah? Bonded to me? My gorgeous blood bag for eternity.”
“Izuku–ah–”
“Say my name again. Please, Kacchan? Keep saying it? I–I want to hear how your voice sings my name as you come.”
“Izuku…Izuku…don’t stop. Izuku–Izuku!”
A sudden slap of Izuku’s hand on his swollen, neglected cock snaps the coil in his belly. He can feel the squirt that’s threatening to gush out of him, but Izuku doesn’t allow himself to be pushed out. He continues his brutal pace as he aggressively swipes his fingers over Katsuki’s cock.
Katsuki’s entire body begins to shake, as his release stays trapped and only continues to fall over itself in an attempt to be free. Izuku pays it no mind. His breathing has become erratic, drool dripping onto Katsuki’s abdomen as he mindlessly fucks into him. Fingers continue to play with his cock and nipple, all while his cunt squelches and throbs. It’s only when Izuku falls forward, teeth biting into Katsuki’s shoulder to muffle his scream as his hips stutter and stall, do the hands finally let up.
They stay there, connected at the groin, as Izuku carefully releases his jaw from Katsuki’s skin. Katsuki partially wants to complain for the mark that is sure to scar, but he can’t find the strength.
His entire body feels like putty. Something that was molded and warped to be played with for Izuku’s desire. Exhaustion is rapidly washing over him, his eyes struggling to stay open as he stares at his ceiling. It will probably only be a matter of a few minutes before he slips unconscious.
He should take this time, while he is able, to clean up the mess of himself and the bed that he lays in. Make sure the candles are properly extinguished with no worry of them lighting again in the night. End the summoning and send Izuku back.
The final thought unsettles him enough to make him bury his face into the crook of Izuku’s neck. His hands reach up, nails digging into Izuku’s back and pulling him flush against his chest. His voice is weak, raspy and pained against his throat as he mumbles into his neck.
“...Don’t go.”
Izuku chuckles into his neck. He kisses his jaw, his cheek, the bridge of his nose before pulling back to look into his eyes. The white hearts still pulse. An endearing blush for reasons outside exertion painted over his cheeks.
“You’re stuck with me forever, Kacchan.”
A tired, dazed smile pulls on Katsuki’s lips. “Yay.”
“Yay?”
“Yay.”
“Will you always be this mushy after we fuck?”
Katsuki shrugs, head lulling to the side. He looks up at Izuku with a sly glint in his eye and a smirk on his lip. “Guess you’ll have to fuck me again to find out.”
Izuku returns the tease, forked tongue sliding over his bottom lip before he replies, “Oh, I plan to.”