Archive of Our Own

“You’re shitting me,” Kaoru said bluntly.

“Would I joke about this?” Kojiro sulked.

Kaoru frowned thoughtfully; the fact Kaoru had to actually consider made Kojiro a bit miffed but Kaoru’s brain had always worked a little differently. Which is part of the reason why thought Kaoru, of all people, might be able to help him.

“You’re sure you’re not just, like, a late bloomer? Or just a beta? I mean, you have no scent, you must be a beta. If you were an omega I’d be able to smell you—”

“Dude,” Kojiro cut him off. “Trust me. Yes, I’m sure.” Memories—embarrassing memories—of his most recent heat flooded his mind just as heat flooded his face. “I’m—I’m an omega. I don’t have an answer for the scent thing but…trust me. I’m an omega.”

Kaoru pursed his lips and narrowed his eyes critically, still wary that Kojiro was bullshitting him. Then he came to a conclusion with a shrug and resigned sigh.

“Guess I should’ve known with the way your boobs are getting bigger.”

“What? No! That’s because I’ve been working out!” Kojiro blustered, finding it hard to keep a scowl as Kaoru laughed his ass off.

“Seriously, though, how did you keep it a secret this long? Does anyone else know?”

“It wasn’t easy,” Kojiro admitted. “And, uh, no. Well, I mean my parents do, obviously—”

“Obviously.”

“—but I haven’t told anyone else.”

“Does it really matter?” Kaoru asked. “I mean, yes, it matters, but…” he trailed off with another shrug.

“That’s easy for you to say because you’re an alpha,” Kojiro pointed out. “And everyone expected me to be one too.”

“That’s because people are still too obsessed with the old stereotypes,” Kaoru said breezily. “I mean, people thought I’d present as an omega and they were sure wrong, weren’t they?”

“Yeah,” Kojiro said quietly. He’d been one of those people, so sure that Kaoru’s slender form and androgynous beauty meant he would be an omega. And likely a highly sought-after one at that. Kojiro wasn’t sure he’d even have a chance, but he’d still held out a glimmer of hope…

And then his friend surprised everyone by presenting as an alpha. 

“I think it’s a mistake,” Kojiro said, glancing nervously at Kaoru.

“You think what is a mistake?”

“I don’t know how this happened but I don’t think it’s right. I didn’t think I was an omega, no one around me expected me to be one—hell, you know me better than anyone and you didn’t even believe me!”

“Yeah, okay,” Kaoru conceded. “But, again…is it that big of a deal? You’re an omega. So what.”

“It’s a huge deal!” Kojiro protested.

“Why? Because it doesn’t suit your image? Because you’re supposed to be the macho, dominant one? Because it’s less to be an omega?” Kaoru stared back intently. “Why?”

All of that, Kojiro thought. But with his stupid little shrug Kaoru made all that seem so trivial, like it wasn’t Kojiro’s life they were talking about here. 

“I just think something got screwed up,” Kojiro said, ignoring Kaoru’s questions. “I don’t feel like an omega. And yes, before you ask—again—I am certain I am one. At least for the moment.”

That got Kaoru’s attention, just like Kojiro hoped it would. 

“For the moment?” Kaoru repeated, interested. “What does that mean?”

“Well, I’m sure you’ve heard the rumors…” 

“Rumors,” Kaoru said. “That’s all they are. You know they can’t possibly be true.” Yet Kaoru sounded unsure, like he was hoping Kojiro would argue with him. Would have evidence to the contrary.

Kojiro licked his bottom lip nervously. “What if it can be done?” He hesitated, almost afraid to even utter the next word, bracing for Kaoru’s mocking laughter. “Studding?”

But Kaoru didn’t laugh. Instead he just stared at Kojiro for a long moment, as if those golden eyes could see right through him.

“You’d do it?” Kaoru asked finally. “You’d change if you could?”

Kojiro nodded, barely at first and then with increasing conviction. “Yeah. I want to be what I’m supposed to be.”

Kaoru’s face lit up .“Maybe once you turn, then we’ll finally see what you smell like. But I’m warning you, if it’s just eau de sweat I’m gonna be disappointed.”

Kojiro laughed, not really feeling it. “Yeah. And…I dunno. Maybe then I can find who I’m really supposed to be with. Since it’ll resonate with them, y’know?”

“Oh, good point.”

“But you did say ‘once you turn’ just now, right?” Kojiro asked hopefully. 

Kaoru sighed with a wry glare at getting busted. “Fine,” he said with a nonchalant shrug. “I might…know some places to look up this sorta thing.” He flashed a grin. “And I love a challenge.”

“Oh great, I just volunteered myself as a science experiment, nerd mode: activated,” Kojiro groaned dramatically.

“Hey, asshole, I don’t have to help you, you know!” Kaoru laughed, socking Kojiro in the shoulder.

Kaoru’s first thought upon Kojiro’s revelation was incredulity. Then it was…relief. He was an alpha, Kojiro an omega, it didn’t get much simpler than that! He’d been keeping his feelings at bay for all these years because of course Kojiro would be an alpha—just look at him! 

But before he could actually celebrate properly, Kojiro had said all that about it being a mistake and wanting to switch so he could find his fated mate.

Because of course that wouldn’t be Kaoru.

So all he could do was jump in with both feet—if Kojiro was determined to get studded, well. Kaoru was determined to be the one to do it.

Somewhere inside, Kojiro had held out a sliver of hope that when he revealed his secret to Kaoru, Kaoru would point out that hey, he was an alpha, Kojiro was an omega: it didn’t get much simpler than that! Even if Kaoru insisted he had no scent, and thus Kaoru couldn’t be his fated mate, Kojiro would have still been perfectly happy if Kaoru had wanted him at all.

Instead he’d hit the ground running with this studding idea and was already (well, after a brief wrestling match as a result of Kojiro’s “nerd mode” comment) researching frantically on his phone with one hand and taking notes with the other.

Still, as he watched Kaoru scowl intently at his phone, eyes flickering reading at high speed on that tiny screen, Kojiro couldn’t help but smile a little. Kaoru may never want him as a lover, but at least he loved him enough to help with this.

❀

“So,” Kaoru said a couple weeks later, very matter-of-factly as if he was about to give a math lecture instead of discuss the very awkward and very personal issue of studding his best friend. “Did you read the PowerPoint I sent you?”

“Uh, no.”

(He had…or tried, anyway. But he’d gotten a little too turned on at the thoughts it conjured up and ended up rubbing one out halfway through. Certainly wasn’t going to tell Kaoru he jerked off to his PowerPoint though.)

“I went to all that trouble to put that together for you and you didn’t even read it? Do you seriously even want my help with this?”

“Yes! Come on,” Kojiro half-whined, “you know I hate to read. Can’t you just…tell me the important parts?”

Kaoru sighed, excessively exasperated, and added an eyeroll for good measure. “Okay, so. Ideally, theoretically, you’d be fucking another omega. Probably.”

“Probably,” Kojiro echoed.

“But we don’t have one of those because that’s not what I am,” Kaoru continued breezily. “But who knows—maybe topping an alpha will really rev up those hormones. Gotta have some major BDE to dick down another alpha, right?” Kaoru pondered.

“You do realize the other alpha getting ‘dicked down’ is you, right? You really want to talk about yourself like that?”

“It helps,” Kaoru admitted. “Keep it light.”

“You don’t have to do this—“

“I want to,” Kaoru blurted. “I mean, I want to help you, y’know?” Then, because he was a manipulative little shit, “You’d do it for me, wouldn’t you? If we were switched?”

Well, Kojiro had lived years in fact hoping their positions would be switched and he’d get to do Kaoru a lot. Sure, that wasn’t exactly what Kaoru was talking about here, but still—

“Yeah,” Kojiro admitted with a thick swallow. “Yeah, I would.”

“Or are you trying to say you don’t want me to do it? Sin-since you asked, I assumed you meant…” Kaoru trailed off, visibly starting to panic from embarrassment.

“I wouldn’t trust anyone else with this,” Kojiro said honestly. 

“Oh,” Kaoru said, surprised. Pink tinged his cheeks as he smiled awkwardly. “Okay then. Um. W-when do you want to do this? And to be clear, it probably isn’t going to work the first time—if at all. From what I’ve read—and the sources are pretty shady, I warned you—”

“Yes, you warned me.”

“—it’s a gradual thing. So, um. Don’t get disappointed if we have to, y’know. Do it several times. Or more.”

Kojiro struggled to keep a straight face and not celebrate outright. “I’ll be patient,” he promised solemnly. 

❀

“Alright,” Kaoru said on their designated day, a seemingly innocent sleepover at Kojiro’s place while his parents were out of town. Without any further warning, he peeled off his shirt, then looked at Kojiro expectantly. 

“You want me to just…get naked?” Kojiro asked uncertainly.

Kaoru rolled his eyes. “I’m doing this for you, you know,” he huffed. “From my research, the key is hormone exposure. Tricking the body into compensating and then evolving as a response to ensure the survival of the species.” He frowned wryly, hand on his hip. “Because unfortunately, our biology doesn’t give a shit if you think it’s a mistake or you feel wrong. Alllll it cares about is making babies. But the good news is, we can exploit that. Uh, hopefully. For your sake.”

“So what exactly are we doing?” This was more nerve-wracking than Kojiro thought it would be. When he’d suggested it, he’d assumed it would just be kissing his best friend and fucking until he finally…well, maybe he hadn’t gotten that far. Finally formed a knot or felt really powerful or something? 

“Hormone exposure,” Kaoru said bluntly, raising up two fingers. “I think our best best is a two-pronged approach. So…” Kaoru cleared his throat, flushing slightly. “In some of my research, one person claimed to have made his friend an omega by sneaking cum into his protein shakes.”

“Holy shit, rude.”

“Yeah,” Kaoru agreed. “Some of this stuff got a little wild. Anyway, the, uh, consent here isn’t the important part, we only care about the science and replicating the experiment. Inversely.”

“Shady fucking science.”

“Yes, but anyway—if cum in the friend’s shakes made him an omega, then ingesting slick should, theoretically…”

“Turn me into an alpha,” Kojiro finished.

Kaoru nodded. “Theoretically,” he repeated.

“But isn’t that just exposing me to my own hormones?”

Kaoru shook his head. “It’s the method of exposure. Your body is interpreting it as ‘Mm, delicious, I’m going down on some super excited horny omega, I need to put some babies in there—’”

“Gross!” Kojiro laughed.

“Super gross,” Kaoru agreed, laughing with him. “But that’s how it works. So with enough, uh, ingestion?—your body will modify itself so you can do…what it thinks you’re supposed to do.”

“Okay,” Kojiro said with a nod. This seemed weird and a little gross but simple enough. “What’s the second, uh, prong?”

Kaoru snorted at the emphasis. “Right. The second…prong.” His eyes flickered very unsubtly to Kojiro’s groin. “We want to convince your dick it’s actually an alpha dick. So, we’re exposing that to slick too. That’s…” Kaoru swallowed, trying to hide his nervousness and doing a pretty shitty job of it. “That’s what you’re going to fuck me with.”

Kojiro shifted uncomfortably, already feeling that familiar excitement between his legs at the thought. “Okay.”

“If you’re okay with that,” Kaoru added.

Kojiro was beyond okay with it. “Yeah,” he said, trying to play it cool. “I mean, you are, right?”

Kaoru gestured at his shirtless torso with a shrug. “Apparently.” He flashed a smile a Kojiro’s laugh. “So. Chop-chop,” he said with a little clap. “Naked.”

“We’re just jumping right into it?” Kojiro yelped.

Kaoru sighed in dramatic irritation. “What exactly did you have in mind?”

“Well,” Kojiro said awkwardly. Here they were talking about eating out and fucking and whatnot and yet this was too embarrassing to ask for. “I thought maybe, like, kissing…first?”

“Kissing,” Kaoru said flatly, tongue darting across his bottom lip all the same.

“Y-yeah,” Kojiro continued, struck with an idea. “I mean, we need slic—uh, hormones, right? I can’t just make those on demand. I need something to kinda, y’know. Get me excited.”

He was already plenty excited just from talking about all this but Kaoru didn’t need to know that.

“Alright,” Kaoru said, crawling onto the bed, over Kojiro’s legs and crowding him until his back hit against the headboard. 

Kojiro’s omega brain flared to the forefront, immediately thrilled by the predatory look in Kaoru’s eyes, the feeling of being caged in, trapped by long limbs. His lips parted in anticipation, both obedience from an omega to an alpha and as a teenage boy who was simply in love with his best friend.

“Hm-mm,” Kaoru hummed with just a little shake of his head before looking at Kojiro with a wicked glint in his eye and a mischievous smirk on his lips. “You’re the alpha, now, aren’t you? You make the first move. You kiss me, alpha.” He bumped their noses together. “Kiss me, Kojiro.”

Kojiro knew he’d remember forever this first kiss: Kaoru’s soft lips tasting of cherry chapstick and his tongue of cinnamon gum.

Kaoru let out an unfairly sexy little sigh as he licked into Kojiro’s mouth and Kojiro was so thankful that he lacked a signature scent or else Kaoru would definitely be smothered with it by now, a dead giveaway that he was turned on and already embarrassingly wet with slick. Just from kissing!

Not only would Kaoru never let him live that down if he knew but then he’d also have no reason to continue—

With a needy hum, Kaoru pressed closer. One hand curled around Kojiro’s neck, fingertips grazing his scent gland, sending a pleasant tingle down his spine while the other palmed Kojiro’s chest.

Kaoru squeezed Kojiro’s pec and broke the kiss with a thoughtful frown. Looking critically down at Kojiro’s chest, Kaoru cupped a pec in each hand, squeezing tentatively. “You sure these aren’t getting bigger?”

“Well, they probably are, but that’s because I’ve been liftinnnng,” Kojiro groaned as Kaoru experimentally pinched his left nipple through the fabric of his shirt. “What are you doing?!”

“You’re pretty sensitive,” Kaoru noted, rucking up Kojiro’s shirt to expose his chest.

“They’re n-nipples!” Kojiro stumbled over the word, face heating even as he automatically held his shirt in place under his chin to free up Kaoru’s hands. “They’re supposed to be like that.”

“But aren’t yours more sensitive because you’re an omega?” Kaoru asked clinically, keeping eye contact as he lowered his head and swiped over one with the flat of his tongue. Kojiro whimpered involuntarily. “You sure you wanna give that up?”

“I think they’re just like that,” Kojiro tried to argue, a bit too distracted by the vision of Kaoru licking over his chest. Fuck, he was going to be sitting in a puddle pretty soon. “But if I have to give up sensitivity then it’s sss—” Kojiro broke off in a hiss as Kaoru sucked a nipple. 

“Too much?” Kaoru asked, still holding it gingerly between his teeth.

“Feels good,” Kojiro panted, hoping Kaoru would suck on the other side. “Yours aren’t like this?”

“I don’t think so,” Kaoru said seriously, kneading Kojiro’s left pec as he tongued the right side.

“I could—oh god—” Kojiro threw his head back, conking it pretty soundly against the wall. He didn’t care, his whole world was Kaoru’s mouth at this point. 

“You really like that,” Kaoru commented happily before experimenting with different licks. “Is the right side even more sensitive?”

“Yeah.” Well, there was no point in denying it. Whether it was the knock to the head or the nipple play overriding his thoughts, he didn’t know. But he couldn’t remember what he was about to tell Kaoru a moment before.

Without warning, Kaoru palmed Kojiro’s dick through his basketball shorts.

“Dude!” Kojiro jerked.

“What?” Kaoru asked, like grabbing each other’s stiffies was something they had ever done. “This is the whole point, isn’t it? You feel ready to me.”

“Well, yeah, but you could’ve warned me first,” Kojiro protested, pulling his shirt over his head and flinging it across the room. He was tired of holding it up and annoyed by the feeling of it shoved into his armpits. Besides, if Kaoru had already moved to the junk-grabbing phase, having a shirt on was pretty pointless.

Kaoru stared at his chest for a moment, swallowing thickly before catching himself and refocusing. 

“I’m going to reach down your shorts,” Kaoru said bluntly. “There’s your warning.”

“I’ll just take them off!” Kojiro yelped. “D-don’t look.”

Kaoru burst out laughing. “Kojiro, I’ve seen you naked more than anyone. We’re going to fuck. What’s the point of—”

“Just turn around,” Kojiro begged, face aflame. “Just…please.”

With a dramatic sigh, Kaoru did as Kojiro asked. “Never thought you’d be the modest type,” he grumbled, blatantly amused. “The guy who dates two girls at once to save time and flirts with anything with a pulse—and the occasional hyper-realistic mannequin—is suddenly shy.”

“I do not date two girls at once!” Kojiro laughed, tossing his short and boxers off the side of the bed, praying they didn’t land with a wet plop. (They didn’t.) 

“Not for lack of trying,” Kaoru retorted. “And I see you didn’t argue about the mannequin.”

“You know I’ve never done that,” Kojiro said. “Okay, I’m ready.”

“You totally have,” Kaoru insisted playfully, turning in place on Kojiro’s bed. And of course his eyes went straight to Kojiro’s boner.

“Don’t stare at it,” Kojiro groaned.

“Why not?” Kaoru asked, still staring shamelessly. “Not bad.”

“Not bad?” Kojiro repeated incredulously. “Gee, thanks, dude. And don’t—!” He snatched Kaoru’s wrist mid-reach. “Don’t just go grabbing it!”

“You’re awfully prissy about this stuff.”

“I want you to ki—I’m going to kiss you first,” Kojiro said.

“Again?” Kaoru teased, already leaning in with a smirk on his lips. 

“Mm,” Kojiro said, holding onto Kaoru’s wrist (he didn’t trust Kaoru not to get grabby while he was distracted) with one hand and curling the other around Kaoru’s neck. He’d really liked how it felt when Kaoru had done that to him and wanted to see if he could make Kaoru feel good too.

Judging by the way Kaoru melted into the kiss as Kojiro thumbed over that soft spot right underneath the angle of his jaw, it worked.

“If I didn’t know better,” Kaoru said, likely to distract himself from feeling too good, Kojiro guessed, “I’d think you like kissing me.”

“It’s alright,” Kojiro bluffed, pulling Kaoru more firmly into his lap and kissing him deeper.

Fuck, he loved the feel of Kaoru’s smile against his lips. 

And the feel of Kaoru’s fingers over his—

“What did I say about warning me!” Kojiro choked.

“I can’t do it now either?” Kaoru laughed, lightly squeezing the head of Kojiro’s cock. “Kojiro, I am going to fondle your balls now,” he announced robotically.

“Shut up!” Kojiro laughed. “That’s not what I meannnt—fuck ,” he moaned a second later as Kaoru’s hand slid down his shaft, skimming over his sack and sliding through the wetness coating his taint.

“Holy shit, you’re slippery,” Kaoru marveled.

“Thanks,” Kojiro said dryly, trying not to be turned on by the blatant fascination on Kaoru’s face as he smeared his fingers around in Kojiro’s slick. With a look of endearingly serious concentration, Kaoru continued his exploration, delving between Kojiro’s cheeks, eyes widening when his fingers grazed Kojiro’s hole.

“You really are an omega,” Kaoru said, idly rubbing two fingers over Kojiro’s rim.

“Yeah,” Kojiro grimaced, trying desperately not to press himself down onto Kaoru’s fingers, absolutely forbidding himself from thinking about how awesome that would feel— “I think I told you that.”

“It’s kind of amazing,” Kaoru said sincerely, withdrawing his slick-coated fingers and holding them up for Kojiro to see, waggling them for emphasis. “This.”

“If you say so,” Kojiro said skeptically, watching as Kaoru sniffed his fingers. 

“Doesn’t really smell like much,” Kaoru announced. Then, brow furrowed, he brought his fingers almost to his lips and Kojiro held his breath, transfixed at what Kaoru was about to do. Was this going to be the most disgusting thing or the hottest thing Kojiro had ever seen?

Kaoru’s tongue darted out, just a little blep against the pad of his middle finger.

This was not the time or place for Kaoru to be fucking adorable.

“Well?” Kojiro asked.

Kaoru gave another quick lick, a hint more tongue this time. “It’s kinda weird,” he said. “Here.” He held two shiny fingers up to Kojiro’s mouth.

“You want me to lick my own?” Kojiro asked, thinking maybe it would probably actually be hot if Kaoru commanded him to do it—no . He had to quit thinking like that, like an omega! 

“We don’t have anyone else’s,” Kaoru pointed out rationally. “And besides, I just did it. What’s the big deal?”

Kojiro hesitated slightly. Was it weird? It was…his . Okay, not that he hadn’t maybe tasted it just a little before, but—

With an annoyed sigh, Kaoru rolled his eyes and stuck both fingers in his mouth and sucked them clean with a pop, then opened them up and slid his tongue in between. It was one of the hottest things Kojiro had ever seen and he was pretty sure Kaoru hadn’t even been lewd on purpose.

Kaoru kept his mouth open, trying not to swallow and Kojiro couldn’t look away from the obscene glistening on his tongue. 

“Open your mouth,” Kaoru said, or tried to as much as he could without moving his tongue. Fortunately Kojiro’s lips were already parted in horny surprise when Kaoru licked against his tongue a second later, kissing his own slick into his mouth.

Apparently wanting to be very thorough and make sure Kojiro got it all, Kaoru kissed him until the sweetness had vanished and only that hint of Kaoru’s cinnamon gum remained.

“See,” Kaoru said when they parted. “Not so bad, right? Kinda sweet.”

“Yeah.” Kojiro nodded, mind already a little hazy as Kaoru was already reaching back down between his legs. “You always had a sweet—ah—tooth.”

“Mm,” Kaoru agreed, sucking his fingers. Kojiro’s mouth was already open and waiting.

“You think we’re ready for the next part?” Kojiro panted against Kaoru’s mouth after being kiss-fed his own slick for a third time. This last time, Kaoru had wriggled against him a little and it was almost more than Kojiro could take. 

“Sure,” Kaoru nodded. “The fucking?”

Normally Kojiro would have sighed at Kaoru’s bluntness, but instead he just tightened his hands around Kaoru’s hips, grinding them together with a sloppy kiss. 

“Yeah, the fucking.”

“Okay.” Kaoru swallowed, tucking his hair behind an ear. “Um. I think you should close your eyes.”

It took Kojiro a second to register the request. “Oh, not so easy, is it! You made fun of me—”

“I have to open myself up and I don’t want you to watch!” Kaoru blurted. “But I have to use your slick to do it so I can’t just…go do it in the bathroom or something.”

“Oh,” Kojiro said, feeling somewhat assy but also incredibly turned on at the prospect. Then again, there probably wasn’t much left at this point that Kaoru could do that wouldn’t turn him on. He hoped that would change for the better when he was an alpha.

Kaoru ordered him to put on a sleep mask and swear not to peek.

Kojiro just about came from the sounds alone.

Sure, there was the reoccurring sensation of Kaoru’s fingertips slipping between his cheeks, pressing against his hole but never actually entering, gathering slick. But it was the muffled whimpers, the heavy exhales, the pants of breath. The slip and squelch as Kaoru worked himself open. 

“Can I feel?” Kojiro heard himself ask. “If I promise not to look?”

“You really want to?” Kaoru asked after a minute of hesitation.

Kojiro nodded, hoping Kaoru was even looking at him to see it.

“O-okay. I guess,” Kaoru consented uncertainly. “Here.” He took Kojiro’s hand, guiding it somewhere. 

Oh. Tentatively Kojiro spread his fingers, feeling the ridges and dips of Kaoru’s knuckles, following two slicked fingers to—

Oh.

“Wow,” Kojiro said, tracing the ring stretched around Kaoru’s fingers, feeling it tense with Kaoru’s huffed laugh. 

Back down Kaoru’s fingers, then sliding in the crease between them, following slowly back up, and up, as Kaoru’s fingers were replaced with Kojiro’s.

“Wow,” Kojiro said again, fascinated with the tight heat enveloping his middle finger. “This is you.”

“Mm,” Kaoru agreed.

“I get to be in here?” 

Kaoru laughed, momentarily tightening around Kojiro’s finger. “That’s the plan.” He eased himself just a little lower, pressing into Kojiro’s hand before lifting off entirely. “I’m ready.”

It turned out Kaoru was not as ready as he thought.

Their original plan was to have Kaoru on all fours and for Kojiro to fuck him from behind. It made the most sense since the whole point of this was to trick Kojiro’s biology—might as well fuck in the most alpha position possible.

And it was a good theory on paper.

It just wasn’t a good theory to Kaoru’s inner alpha.

“I’m sorry,” Kaoru apologized, both of them sitting on Kojiro’s bed buck naked. “I didn’t anticipate that…reaction.”

“It’s fine,” Kojiro assured him. It had scared the crap out of him when he’d leaned over Kaoru’s back and Kaoru jolted upright with a yelp. “We can work up to that, maybe.”

Kaoru nodded, chewing his bottom lip. “I, um, have an idea? If you’re up—” His eyes flickered to Kojiro’s erection before looking flatly at Kojiro. “And apparently you are up for it.” He rolled his eyes. “Lay down.”

Kojiro did as he was told, just happy that the whole sex thing hadn’t gotten called off entirely. 

Without warning (Kojiro wondered if he’d ever get used to Kaoru just helping himself) Kaoru reached between Kojiro’s legs, fingertips swirling around his hole to stimulate another outpouring of slick.

“This shit’s amazing,” Kaoru muttered to himself, smearing it all over Kojiro’s straining cock.

“Glad you think so,” Kojiro tried to retort, sounding a bit too breathy.

“Should’ve probably blindfolded you for this,” Kaoru lamented as he straddled Kojiro’s hips and lined himself up. He shot Kojiro a glare for good measure. “You probably don’t want to watch.”

Kojiro wanted nothing more.

“If you get grossed out, close your eyes,” Kaoru warned, flinching as he started to press himself onto Kojiro’s dick.

“You okay?” Kojiro asked, worried about the way Kaoru’s teeth bit into his lip and the strain around his eyes, clenched shut.

Kaoru nodded. “It’s fine,” he said, sinking down slowly. 

“Does it hurt? You don’t have to do this—”

“Just have to get used to it,” Kaoru said with a tense exhale. 

Kojiro felt a little guilty for being so fucking turned on, especially considering the hint of pain on Kaoru’s face. But here was his best friend—his beautiful best friend—stark naked, nipples pink and hard on chest flushed and mottled with embarrassment and exertion, slender pale legs contrasting against Kojiro’s tanned skin as Kaoru straddled his hips, taking in Kojiro’s eager cock. Even half-mast, Kaoru’s dick was beautiful, which Kojiro never thought he’d ever actually think about a dick but—

Half-mast?

Without really thinking, Kojiro reached forward, wrapping his fingers around Kaoru’s cock.

Kaoru’s eyes shot open in surprise. “What are you—” He stopped mid-sentence, eyelids fluttering and face relaxing as Kojiro started to stroke him slowly. “Oh, that helps,” he breathed, easing down, ass settling against Kojiro’s hips. 

“Better?” Kojiro asked.

“Much,” Kaoru nodded, then scowled in embarrassment. “I can’t believe I didn’t think of that.”

Kojiro flashed a grin. “Well, you’ve been grabbing mine all day, figured it was my turn.”

A little laugh escaped Kaoru. “And this?” he asked, raising up just slightly before lowering himself back down. “How does this feel?” He tried it again, a little further this time.

“Amazing,” Kojiro admitted with a groan, hands moving of their own volition to grip Kaoru’s hips. “Keep moving.”

“Yes, alpha,” Kaoru teased, starting to find a rhythm in earnest. 

It didn’t take long—Kojiro didn’t stand a chance, his first time in his friend’s ass, watching Kaoru fuck himself on his cock. Kaoru’s blunt nails dug into Kojiro’s chest, possessive and marking, and combined with a hint of arousal filtering through Kaoru’s scent, it drove Kojiro’s inner omega wild. 

Hungrily, Kojiro watched Kaoru’s cock slapping down against his abs. Kojiro’s mouth watered just looking at it, dying to lick it, scent it, suck it—

No, he tried to remind himself. Alphas got their dicks sucked, they didn’t suck dick. He had to quit thinking about how Kaoru’s cockhead would feel against his tongue, how he’d taste shooting down Kojiro’s throat—

“Kaoru,” Kojiro ground out, dangerously close. “I’m—”

“Come inside,” Kaoru panted. “Not like you can knock me up.” Flushed and dewy, Kaoru smirked down at him, eyebrow raised. “Come on, alpha,” he challenged, picking up the pace. “Fill me up. Breed me, Kojiro.”

“Fuck.” With a growl Kojiro yanked Kaoru down to him, kissing him almost viciously as he came, squeezing Kaoru in his arms as he thrust into him, feet planted on the mattress for leverage, riding out his orgasm.

Still hugging Kaoru to his chest, he planted a few lazy open-mouth kisses along Kaoru’s neck, inhaling deeply, finding threads of contentment running through Kaoru’s abnormally muted scent. He damn near started purring as Kaoru nuzzled under his jaw, lapping at his scent gland there.

For a second, he thought Kaoru was actually purring but then he realized no, he was giggling—

“What was that?” Kaoru asked, body shaking with laughter, still wrapped up snugly in Kojiro’s arms. “Breeding kink, much?”

“Don’t ever do that again,” Kojiro groaned, mortified. 

“But it worked really well—”

“Don’t ever. Do that again,” Kojiro repeated, scrubbing his face with one hand and stroking down Kaoru’s back with the other. 

Kaoru laughed, undeterred, resting his head against Kojiro’s shoulder. “Good?”

“Aside from the last bit embarrassing me for the rest of my life? Really good.”

“Good,” Kaoru said, smile uncharacteristically soft. A moment later it was gone, replaced with a sigh as Kaoru sat up. “One down, however many more to go,” he said with a playful smack to Kojiro’s stomach.

“Wait,” Kojiro scrambled to sit up, not ready at all to do so. “What about…you?” He fumbled, feeling like the world’s worst lay for taking this long to realize Kaoru hadn’t cum.

Kaoru glanced down at his own dick as if he wasn’t aware it was still hard and needed to check it. “Oh, I’m fine—”

“That’s not fair, though,” Kojiro said immediately. “You want me to..?” He made a jerk-off motion with his hand. “Or, uh?” He mimed a bj, shoving his tongue on the inside of his cheek. 

Kaoru huffed a laugh, shaking his head a little. “Nah. It’s really fine. And, I mean, we can’t risk exposing you.”

“Oh,” Kojiro said quietly. He hadn’t really thought about that. “Wait, so that means every time we..?”

“Yeah.” Kaoru nodded. “Pretty much. I mean, if I happen to cum while we’re fucking I think it’s probably okay? But you probably shouldn’t do anything yourself to, like, encourage it. Don’t want any potent jizz near your hands, mouth, or hole.” He hopped up off the bed, flinching slightly before continuing, “Inert would be okay, I think, but being an alpha mine is not…” 

Trailing off, Kaoru stared in disgust down at his legs; Kojiro stared too, watching milky cum slowly dribble down Kaoru’s inner thigh.

“Gross!” Kaoru said. “I’m all drippy!” He looked up at Kojiro, still seated on the bed. “Is this how you feel all the time?”

“What? No!” Kojiro laughed, throwing a pillow at Kaoru’s head (that he easily dodged). “Besides, you told me to do it. Uh, quite graphically, if I recall, which I don’t, actually—”

“I didn’t think there’d be this much,” Kaoru admitted, spreading his legs a little to get a better look. “Damn. Look at all this. Good thing you are inert; if you had swimmers I’d be knocked up for sure.”

“Yuck!” Kojiro yelped, trying not to laugh and give Kaoru the satisfaction.

“Then again I guess if you had alpha cum we wouldn’t be doing this in the first place,” Kaoru added, swiping his thighs with Kojiro’s discarded shirt.

“Did you just wipe jizz on my shirt?” Kojiro asked incredulously.

Kaoru glanced at the shirt balled in his hand, then back at Kojiro. “No?”

“Liar!” Kojiro laughed, dodging the cummy shirt thrown at him a second later.

❀

Kaoru lapped hungrily between Kojiro’s legs, over his hole, face drenched with slick as Kojiro tried stifling his moans so they wouldn’t get caught. 

“Don’t have time for the whole process today,” Kaoru said, for his benefit as much as Kojiro’s, trying to fight off the intoxication of the sweetness coating his tongue, sliding down his throat. He smeared Kojiro’s slick over his sack, his cock, then licked him clean. “But at least we can do this much,” he offered, coating Kojiro’s dick again then swallowing him down.

“Fuck,” Kojiro groaned quietly, pushing Kaoru’s bangs off his face to get a better look. “C’mere.”

“Hmm mm,” Kaoru hummed around his cock, fondling Kojiro’s balls with slippery fingers. Determined to get Kojiro to cum, Kaoru continued working his cock with his mouth then teased that sensitive hole with his fingertips—

With only a surprised gasp as warning, Kojiro spilled forcefully down Kaoru’s throat, hot and bitter. 

“Fuck, I’m so sorry—” Kojiro blubbered, trying to pull Kaoru up to him.

“’S fine,” Kaoru insisted, with a last little cough, sounding slightly stuffy. He gave a tentative snort, crinkling his nose. “I think I might’ve got some up my nose.”

For a second Kojiro just looked at him incredulously, then laughed, quickly pecking him on the lips before licking his own slick off Kaoru’s face with broad swaths of his tongue.

❀

“We’re getting better at this,” Kaoru panted, flopping limply on Kojiro’s chest and burrowing his face into the crook of his neck. Kojiro thought that might be his favorite part of the whole thing. Well, besides the cumming. But he loved these soft moments after, the weight of Kaoru on him, licks and lips and happy sighs against his neck.

He sometimes wondered if he wasn’t an omega and didn’t have a hypersensitive scent gland there, had been born just a normal human, one of the millions of people out there oblivious to their secret race (and likely happier for it) if he would still love this part so much.

He was pretty sure he would.

What he wasn’t sure of was whether he would still love this part so much…if it was with anyone besides Kaoru.

“Don’t you think?” Kaoru asked, prompting Kojiro out of his silence.

“Huh? Oh—yeah,” Kojiro agreed. Because they were getting better at this. Kaoru was taking him easier each time, and being more comfortable and relaxed had somehow made him even sexier, which Kojiro hadn’t thought possible. They laughed a lot more, most of the awkwardness of the first time evaporated. 

This last time Kaoru had even let Kojiro stretch him—Kojiro had suggested that it was something an alpha would do and might even help with the hormone absorption. He felt pretty clever for coming up with that and fortunately Kaoru bought it.

Kaoru still didn’t finish though and it didn’t matter how much he swore that didn’t bother him, it bothered Kojiro . One, because he hated to be “that guy” and such a pathetic lay, regardless of extenuating circumstances; and two, because he didn’t understand why, when he was an omega (for the time being, anyway) and Kaoru was an alpha, Kaoru was so …nonchalant. Not only was he an alpha, he was a teenage boy! Shouldn’t he be, well, hornier?

“Kojiroooo?” Kaoru rapped his knuckles on Kojiro’s forehead. “Are you in there? Did we literally fuck your brains out? I should’ve known better, you didn’t have much to begin with—”

“Hey, asshole!” Kojiro laughed, play-wrestling with Kaoru in his bed, finally managing to roll and pin Kaoru underneath him.

“I’ve been meaning to ask,” Kaoru said slowly, hair splayed out on the pillow, their fingers still intertwined from their playful power-struggle. “Have you noticed any difference?”

“Not really,” Kojiro admitted. He was secretly pleased that there had been no change whatsoever—that meant they could continue whatever this was. But part of him did worry that Kaoru would eventually just write it off as a failed experiment and be done with it…and him. 

“What about being—maybe—a little stronger?” Kaoru asked, squeezing Kojiro’s fingers, trying to push him off. 

“That’s only because I’ve been lifting,” Kojiro said wryly, pushing back. 

Kaoru sighed. “I haven’t noticed anything either,” he begrudgingly admitted. “I thought maybe I could tell by your slick production but you’re as slippery as ever. Which, I mean, I still think is pretty neat but not exactly the results we’re after.”

“Yeah,” Kojiro said, distracted by the feeling of Kaoru pressed against him, pinned underneath his hips. Pink hair fanned across the dark blue pillowcase, a rosy flush lingering across sharp cheekbones. Golden eyes framed with long lashes. And those lips that Kojiro knew from experience were soft and always delicious—he wanted to kiss them now, actually, kiss all of Kaoru, maybe something more than fucking but actually, like, making lov—

Oh shit. Kaoru would laugh himself sick.

And probably cut him off.

“What about this?” Kojiro blurted.

“What about what?” Kaoru asked with a confused frown. “Wrestling?”

“No! Um…” Kojiro ground their hips together just a little, too embarrassed to just say sex stuff like Kaoru did. “This way. I mean, I like what we do now, but that wasn’t the original plan, right? Maybe if we switched to a more…alpha…ish…position…”

“Good idea!” Kaoru said, crunching up enough to knock his forehead into Kojiro’s. “I guess there is a brain left in there after all!” 

“Hey!”

“Probably not gonna get to try it out for a week or two though,” Kaoru said seriously. “Neither one of us will have a place to ourselves, will we?”

Kojiro shook his head. “No.”

“Don’t look so sad,” Kaoru said, freeing a hand and ruffling Kojiro’s hair as if he was a dejected puppy. “We’ll just sneak in what we can in the meantime like we have been.”

“Right,” Kojiro tried for a reassuring smile. And, in fairness, he did like what they’d been doing. All of it. But… “Do you think…” he trailed off, afraid to say it.

This can even work?  

“I do think, could you be more specific?” Kaoru asked sweetly.

Kojiro stared down at him, too preoccupied with his own thoughts that it took him a second to get the joke. 

“The answer is no,” Kaoru said.

“But I didn’t finish my question,” Kojiro said warily.

“You were going to ask me if you could have kids as an alpha,” Kaoru explained. “And the answer is no. Well, I mean, if this works it will be borderline miraculous so I guess ‘never say never’ when it comes to you having kids but…”

“You saying my jizz will stay inert?”

“That’s exactly what I’m saying,” Kaoru said with a nod. “I guess, maybe you could dam but…I’m not even sure about that. And I think even if you could, something as big as pregnancy and whelping would likely undo everything and reset you back to an omega. But honestly, I think the most likely outcome is you end up completely sterile. So,” he cautioned, “if you want your own little baby gorillas someday, you might want to think about that before we continue.”

“You really think it’ll be borderline miraculous if this works?” Kojiro asked quietly.

“Honestly? Yes,” Kaoru answered bluntly. “I mean, do you know of anyone—and know them personally, not just urban legends you’ve read online or any of that friend-of-a-friend’s-cousin bullshit—that has managed to pull this off?”

“So why—” Kojiro licked his lips, afraid of the question and also afraid of the answer. “Why are you okay with doing this?”

Kaoru frowned for a second, momentarily confused. “Because,” he said, breaking out into a grin, “if anyone can accomplish something this fucking crazy impossible, it’s us.” 

❀

“Fuck,” Kojiro groaned, head lolling back against Kaoru’s shoulder.

“Shh,” Kaoru murmured right in his ear. “There are people right above us at the railing. You don’t want them to hear…or do you?”

“Don’t tease,” Kojiro whispered (or tried to) back.

Tucked under the overhang at the run-down drive in, to anyone who could actually see them they probably looked like two kids on the rocky shore, one with his arms around the other, chin on his shoulder, snuggling sweetly as they watched the sunset over the ocean.

Which was mostly true, except for the addition of Kojiro being jerked off with his own slick by Kaoru’s extremely talented hands.

“Oh shit,” Kaoru cursed. 

“What?” Kojiro breathed, not really caring. 

“Um, I got a little…you’re gonna need to button up your collar for a few days.” Kaoru licked over the hickey he’d just made a smidge too high on Kojiro’s neck. 

“Do you think you could bi—” Kojiro clapped a hand over his own mouth, forcing back a groan. “Bite me,” he urged, muffled under his palm.

Kaoru’s rhythm stuttered. “I can’t—”

“Not a real one,” Kojiro pleaded quietly, angling his head and exposing his neck. “Just, just a little teeth—”

With a sigh, Kaoru grazed Kojiro’s neck with his lips, then carefully pinched the flesh over his scent gland with his teeth. 

Kojiro came with a whine all over Kaoru’s hand about three seconds later.

It had occurred to Kojiro—embarrassingly late, but it had at eventually occurred to him—that he should probably ask why, since he was using his own slick for this, he couldn’t just jerk himself off with it or lick it off his fingers. Especially since, unlike Kaoru’s cum, he was allowed to touch it—and had touched it quite a bit, using it to open up Kaoru before sex.

It didn’t really make a lot of sense.

But Kojiro knew Kaoru was scary smart, maybe even a genius (even if Kojiro would never admit that to his face). So no doubt he’d thought of all this before they even started and come up with a very logical reason why no, Kojiro couldn’t do it himself, he definitely needed Kaoru to do it.

Hell, it was probably explained in Kaoru’s PowerPoint somewhere.

So Kojiro didn’t really feel the need to ask. 

❀

“Are your boobs getting even bigger?” Kaoru asked incredulously, a hand on each pec before Kojiro’s shirt was even over his head, already squeezing. “Maybe we’re going in the wrong direction with this somehow.”

“I told you, it’s because I lift!” Kojiro said, slightly muffled by his shirt and nowhere near as frustrated as he sounded. 

“You know, if you really want big boobs that bad, maybe you should just stay an omega—”

“They aren’t boobs, they’re pecs, and no, I don’t want to stay an omega, and do you really have to grab them the second my shirt’s off?”

“Well, I couldn’t believe they’d gotten so much bigger since I saw them just two weeks ago so I had to measure.” Kaoru gave another squeeze, then rolled his thumb over a nipple, bending down to graze it with his teeth.

Kojiro groaned, hating himself a little for already being rock hard. “Th-this measuring too?”

“Mm,” Kaoru hummed, teasing Kojiro with the vibration before suckling. “Measuring the increase in sensitivity. I am starting to wonder if we really are going the wrong direction. Made you some legendary super-omega,” he lamented dramatically.

Kojiro snorted, sliding a hand underneath Kaoru’s shirt to thumb across his ribs, goosebumps prickling immediately. 

“Hopefully this next step will get us back on track then,” Kojiro said wryly. “Ready to level up to…missionary?”

Kaoru huffed a laugh as he pulled away from Kojiro’s chest, glancing away awkwardly as he stood. “Since when is missionary leveling up? Feels kind of like we’re regressing.”

Kojiro frowned. Usually Kaoru was gung-ho, had been almost alarmingly so this entire, uh, project. The first one stripped to nothing, never shy or modest about shucking his shirt or slipping out of his pants before crawling into bed. Hell, he’d grabbed Kojiro’s boobs—er, pecs, without any shame at all just moments ago, latched onto his nipples without any preamble. So why was he standing here, still fully clothed, refusing to make eye contact?

“Are you nervous?” Kojiro blurted, completely surprised.

“No!” Kaoru snapped, glaring.

A smile wobbled uncertainly over Kojiro’s lips. “Why are you nervous?”

“I just said I’m not, asshole!”

“We’ve done this how many times—”

“Not this-this!”

“Wait. You’re nervous about missionary?”

“Now you see why I didn’t want to tell you!” Kaoru scowled petulantly. “Like I don’t already feel like enough of an idiot—”

“Kaoru,” Kojiro said, fighting a smile. He didn’t want Kaoru to think he was laughing at him and shut down entirely, because he knew from unfortunate experience that was totally something Kaoru would do. “We’re in this together; you can tell me anything.”

Risking a headbutt, Kojiro lightly knocked their foreheads together. “Even if it’s stupid. I mean, how many times a day do I tell you something stupid?”

“Like a million,” Kaoru grumbled sulkily. “I can’t even remember the last time you told me something that wasn’t stupid.”

“See?” Kojiro said with a soft smile. It fell away as he stepped back, hand still cupping Kaoru’s hip underneath his shirt. “Do you not want to do this with me anymore?”

“It’s not that!” Kaoru said, frustrated. “I just…” He scrunched up his face in annoyance. “I didn’t think it would be this hard.”

“I can’t control the hardness, it has a mind of its own—” Kojiro said with exaggerated seriousness.

“Ass,” Kaoru said, jabbing him in the stomach. “I know you’ll blame it on the alpha thing but I’m pretty sure it’s just a me thing.”

“Maybe it’s a both thing,” Kojiro suggested. “You control freak.”

Kaoru’s eyes widened in surprise. “You knew?”

“No, but I just figured it out,” Kojiro admitted. “And I do know you better than anyone. You being a control freak doesn’t surprise me. You’ve only been like that…uh…my whole life?”

Kaoru stuck out his tongue and Kojiro grinned.

“Listen, if…if you don’t want to do this, that’s fine. You’ve already done more than I ever could have asked for, tried harder than anyone else would have. But if you want to try this…I do really think this would level us up,” Kojiro said hopefully.

“Really?” 

“Yeah. I think…I think the same thing that makes it hard for you will be what makes it, um, alpha-like for me. If that makes sense.”

“It does,” Kaoru said with a begrudging nod.

Kojiro wasn’t sure that anything about this actually made sense but he wasn’t about to point that out now. 

“Alright,” Kaoru announced, apparently come to some resolution within himself. He peeled off his shirt and tossed it over the back of Kojiro’s desk chair. A second later, he’d stripped off his pants and underwear in one go. “Let’s do this,” he said, crawling onto Kojiro’s bed.

Seeing Kaoru on all fours practically presenting his ass did something primal to Kojiro. He wanted to blame it on his budding inner alpha but he had a feeling that being alpha or omega didn’t have much to do with it. 

Kaoru flopped on the bed, limbs akimbo. “Take me, you big, strong alpha,” he said in monotone.

Kojiro rolled his eyes, seeing Kaoru’s attempt at humor for what it was: a shield to cover his rising anxiety. Stripping bare, Kojiro followed him onto the bed, remembering how thrilling it was when his omega felt Kaoru was stalking him like prey, covering him and boxing him in. 

And he had to remember that for Kaoru, it would feel like the opposite. Every instinct he had—whether he wanted to acknowledge them or not—would be screaming at him to fight, to assert dominance.

So he sat next to Kaoru and took his hand.

“If you try doing something mushy and romantic I will vomit on you,” Kaoru warned. “And punch you in the gut.”

“I’ll risk it,” Kojiro retorted, raising Kaoru’s wrist to his lips, pressing a kiss before licking across Kaoru’s pulse. He inhaled deeply, barely finding Kaoru’s scent that had faded to something so faint since they started doing all this and Kojiro had been afraid to ask why. Still, the gesture was important whether there was scent transfer or not, so he rubbed his cheek over the gland on the inside of Kaoru’s wrist.

Judging by Kaoru’s sigh and the dissipating tension in his fingers, it was working. 

Still holding Kaoru’s wrist to his face with one hand, Kojiro slid the other across Kaoru’s flat belly, sliding up, up—

“I don’t have boobs to grab like you do,” Kaoru said.

“I’ll be the judge of that,” Kojiro replied, leaning over to nose behind Kaoru’s ear, under his jaw. He sucked the soft skin over Kaoru’s pulse, hammering against his tongue. 

But Kaoru arched slightly under his touch so Kojiro hoped it was maybe excited hammering and not two-seconds-from-a-panic-attack hammering.

“Oh you will,” Kaoru tried to retort, a beat late.

“Mm.” Kojiro kissed him softly, feathering fingertips over his chest, following the slight swell of muscle and skimming his palm over a pink nipple.

Kaoru gasped in surprise against Kojiro’s tongue.

“See,” Kojiro said, smiling against his lips. “I told you they’re just like that.”

“Still,” Kaoru argued, blushing an adorable shade of pink and trying to scowl as Kojiro kissed his way from Kaoru’s neck downward. “Mine aren’t anywhere as bad as yours.”

When Kojiro finally got his mouth on one of those little pink nipples, he was rewarded with the best whimper and Kaoru’s nails digging into the meat of his shoulder.

“Shut up,” Kaoru breathed.

“I didn’t say anything!” Kojiro laughed, tugging one between his teeth. 

“You’re thinking it!”

“I’m glad,” Kojiro admitted, lopsided smile on his face. “It’s been all about me this whole time—”

“Because it is all about you,” Kaoru interrupted. “That’s the whole point.”

“But I want you to feel good too, y’know? And isn’t that an alpha’s job?”

“Well, actually, an alpha’s job is to—”

“Do not say the word ‘impregnate’ and ruin the mood.”

Kaoru giggled, breath catching as Kojiro mouthed over the other side of his chest. “Then yes, I guess. If you’re being generous with your interpretation. And besides,” Kaoru added, a dangerously mischievous lilt in his tone, “I thought you liked trying to impreg—”

Kojiro blew a raspberry on Kaoru’s stomach, eliciting a squeal and nearly getting kneed in the head. Accidentally, he was pretty sure. 

“Enough of that,” Kojiro growled playfully. “I know you’re trying to distract yourself, but that word is off-limits.”

“Uh, so is that,” Kaoru said warily as Kojiro sucked a mark over Kaoru’s hipbone. “No dick, remember?”

“I won’t,” Kojiro promised, settling himself between Kaoru’s legs.

“You better not be lying,” Kaoru warned.

“I’m not!” Kojiro insisted. He’d thought about it, but…

Instead he nibbled along the inside of Kaoru’s thigh, stopping every few kisses to rub his face against silky skin. Relief flooded Kojiro as Kaoru started writhing against him, letting out needy sighs as Kojiro attempted to mingle his nonexistent scent with Kaoru’s almost imperceptible one. Kojiro hadn’t been sure how well this would work, with Kaoru being an alpha; an omega, though, would be soaked by now.

Kojiro was evidence of that.

But he found he didn’t mind his slick as much anymore, reaching down shamelessly between his own legs to liberally coat his fingers and begin opening Kaoru up.

“I’ll go slow,” Kojiro promised, lining himself up. “So if it’s uncomfortable when I start to top you—”

“I’m not some fragile princess, I’ll be fine,” Kaoru said dryly. He wished he’d never said anything earlier, avoided that little two-second freak out that now had Kojiro treating him so gently. That was the last thing he wanted.

“I don’t want you to be fine, I want you to be…better than fine,” Kojiro finished lamely.

Kaoru snorted, reaching up and Kojiro flinched, anticipating a rap on the head. Instead Kaoru combed his fingers through Kojiro’s hair, scratching over Kojiro’s scalp.

“Come on,” Kaoru said with a glint in his eye. “Don’t make me start talking dirty just to get you moving. Though I think you kinda like my filthy mouth—”

Kojiro kissed him, which Kaoru interpreted as an admission of guilt, and smiled into the kiss. Honestly, they kissed way too much for what they were doing. But Kojiro really seemed to like it and Kaoru didn’t see the point in reminding him it wasn’t particularly necessary for their project.

Even if Kaoru felt a smidge guilty that after waiting his whole life for Kojiro to kiss him, this is how he finally got it. 

Kojiro’s cock pressed against his hole and Kaoru tried to restrain himself, to keep from pushing himself down, forcing Kojiro in. Yes, he’d been concerned about losing control—

But it wasn’t the kind of alpha control that Kojiro assumed.

He’d gotten slightly addicted to the way Kojiro looked underneath him, those heavy-lidded eyes glazed with desire. That stupid sculpted chest, the mouthwatering swell of his pecs. And the feeling of those little nubs on his tongue, Kojiro’s gasps and moans resonating against his lips. The taste of sweat and slick and Kojiro as Kaoru sucked his cock, heavy on his tongue and smooth against the back of his throat.

He loved the sounds Kojiro made, the whimpers and whines, grunts and gasps, moans and pants. 

But he was going to die of mortification if Kojiro did those things to him, heard him make those sounds. This whole experiment was for Kojiro’s sake—what if Kaoru gave in and lost control and Kojiro realized Kaoru had actually been enjoying this the whole time? He’d wonder if Kaoru was even taking this seriously!

So he needed to keep it professional, to resist, even if Kojiro’s mouth wandering all over his body had felt really, really good. Even if he liked how it felt when Kojiro played with his chest or sucked the inside of his thighs or nibbled that sensitive spot on his hip. Even if he liked the way Kojiro kissed him deeply, in time with his fingers working Kaoru open. 

Even if he liked how Kojiro forgot to keep kissing him, just sighing into Kaoru’s mouth as he was overcome with the pleasure of sliding inside, slow and deep, until his hips pressed flush against Kaoru’s ass. 

None of that mattered—Kojiro couldn’t know that Kaoru liked any of this.

“Let me know if it’s too much,” Kojiro said, sliding out then slowly easing back in.

“It’s not, I mean, it won’t be. Just…I’m fine, I promise,” Kaoru assured him, trying not to focus on the sweet stretch of his hole around Kojiro’s dick, rocking in and out—

Kaoru arched involuntarily, letting out a loud moan as Kojiro thrust firmly into him.

Well, fuck.

Maybe…maybe as long as he could keep from cumming it would still be okay.

❀

They had definitely leveled up.

Kaoru’s inner thighs were perpetually mottled with shades of blackish purple to blue to yellow from Kojiro’s mouth and he started wearing a thicker band on his watch to hide the teeth marks on the inside of his wrist. Scratches from blunt nails stretched across Kojiro’s shoulders and more often than not he had to button his collar just a little higher to hide the ever-present hickeys littering his neck and collarbones. 

And despite Kaoru’s insistent protests that “your romantic shit is gonna make me puke, knock it off” Kojiro still managed to at least pepper soft kisses along Kaoru’s neck as Kojiro opened him up or intertwine their fingers as Kojiro fucked into him slowly.

Or kiss him as Kojiro came deep inside, Kaoru’s legs clamped quivering around his waist. 

Sometimes Kaoru still topped (which Kojiro was grateful for because he liked that too), simply pushing Kojiro down on the bed as soon as the bedroom door was locked and crawling on top of him, ravaging him with his mouth before Kojiro was even fully undressed. Or if he was feeling really ornery, Kaoru would sidle up to Kojiro while he was talking to other classmates (usually girls) and whisper in his ear, “I want to ride you today.”

Honestly, Kojiro probably liked when Kaoru did that a little too much. Even if he knew there was no way Kaoru was actually jealous, he still liked to pretend.

Kojiro was having a blast, so much that he almost forgot the whole point of this.

Almost.

…How long would Kaoru keep doing this with him?

❀

“Kaoru,” Kojiro said gently, as if his alarm hadn’t shrieked loudly for a good ten seconds before he mustered the energy to reach over and shut it off. “Time to get up.”

“Hm-mm,” Kaoru groaned, sleepily wriggling against him and burying his face in the crook of Kojiro’s neck. He’d always been a cuddly sleeper, snuggling into Kojiro since their very first sleepover at age five. But now that they’d started this whole studding thing, it had gotten even worse, any personal space completely nonexistent.

And not just while asleep, Kojiro realized belatedly.

“Sleepy,” Kaoru mumbled against his skin.

“Yeah, you’re always sleepy, but we have to get up,” Kojiro insisted.

“Don’t wanna,” Kaoru answered petulantly, throwing a leg over Kojiro’s waist and latching onto his neck, lazily sucking.

Kojiro groaned, tightening the arm around Kaoru and hugging him closer. Either Kaoru wasn’t even awake enough to realize what he was doing or he was plenty awake and just fucking with him to see how long he could convince Kojiro to stay in bed. But they really needed to get up and go before they were late to school; Kaoru’s parents might not allow many more of these school night sleepovers for “super important last minute studying” if they didn’t actually make it to class. 

Needless to say, they did not get much studying done.

Or sleeping, for that matter.

“Can you smell anything yet? Any scent? Anything?” Kojiro asked, trying not to focus on Kaoru’s morning wood pressing insistently against his hip.

“Hm-mm,” Kaoru hummed, inhaling deeply before he quit suckling to murmur, “nothing yet. Just normal Kojiro.”

“Damn.”

“Give it time,” Kaoru mumbled. “Here, I’ll wake it up,” he murmured drowsily, lapping slowly over Kojiro’s scent gland.

“Uh, you need to wake up.”

“Five more minutes,” Kaoru said between licks, hand sliding down Kojiro’s bare chest, following his abs and skimming through the short hairs of his happy trail.

Kojiro wondered if he was broken somehow. Maybe it wasn’t just an issue of not feeling like he was meant to be an omega, maybe it was something bigger than that. Sure, Kaoru kept telling him not to worry about it, and seemed to enjoy nosing, nuzzling, and rubbing his face against (and licking and sucking, at present) the scent gland along Kojiro’s neck whether it actually smelled like anything or not.

But scent was important, damn near the cornerstone of their species. It conveyed so much information and thus served so many purposes. Feelings of anger, fear, happiness, and contentment. Ruts, heats, arousal, and attraction. Compatibility and claiming.

He’d always loved Kaoru’s scent—hell, he got through his first heat by fucking himself on a dildo while huffing a pillowcase that still smelled like Kaoru from a recent sleepover.

(He hadn’t been able to look Kaoru in the eye for at least three days afterward. Though that didn’t stop him from poaching one of Kaoru’s undershirts for the next one.)

Without thinking, he nosed into Kaoru’s hair, trying to get a whiff. And it was there, just barely, so faint compared to how it used to be. Back before they’d started the studding experiment. 

Kojiro missed it.

“Kaoru, we have to get up—” Kojiro said, breath hitching as Kaoru’s fingers dipped beneath the waistband of his pajamas.

“Looks to me like you’re already up,” Kaoru said, starting to stroke him slowly.

“We—we don’t—don’t have—” Maybe they did have time? No, they definitely did not! “Don’t have time,” Kojiro managed as Kaoru picked up the pace.

“Time is an illusion,” Kaoru assured him. 

“Tell that to the teacher,” Kojiro ground out.

“I’ll finish you in three minutes,” Kaoru promised, nipping at his earlobe. 

“You’re on,” Kojiro said, already knowing he’d be lucky to last two.

❀

“Are you serious?” Kojiro asked, wide eyed.

“No, I’m Kaoru,” Kaoru deadpanned, sitting next to Kojiro on his bed. “Yes, I’m serious, otherwise I wouldn’t have even suggested it.”

“But I thought you didn’t like that.”

“I didn’t. In the beginning. And, hey, I may not like it now. But I think we should try. We’ve gotten a lot of practice—” A smirk flitted across Kaoru’s lips, gone in an instant. “—And I think I can do it now. And, I mean, isn’t fucking me from behind, ass up on all fours about as alpha as it gets?”

Kojiro grimaced, hand covering his eyes as he clenched his jaw and blew a sigh out his nose. “Why. Do you say shit like that?” he ground out. 

“Because it gets a rise out of you,” Kaoru said wickedly.

“It does,” Kojiro admitted, dragging his hand down his face and opening his eyes with another heavy sigh, just as horny as the first. 

“Very literally,” Kaoru said, palming Kojiro’s chub through his shorts.

“Warn me first!”

“You’re still fussing about that?” Kaoru rolled his eyes. “After all we’ve done, why are you still surprised and act like some blushing maiden when I just grab your dick? Seriously, am I not like a shareholder of dick stock at this point? A co-owner? Minority partner?”

Kojiro burst out laughing and Kaoru’s exaggerated indignation. “What the fuck are you even talking about? You are such a nerd.”

“Yeah, well, your dick thinks I’m really funny and charming,” Kaoru argued, idly stroking what had evolved from a chub to a full-on boner.

Kojiro groaned. “Great. I have my brain, the omega brain, and my dick brain all trying to run my life—”

“Pretty sure Kojiro brain is the smallest of the three.”

“I knew you were going to say that,” Kojiro huffed, trying not to give in and start rolling his hips into Kaoru’s hand.

“So,” Kaoru said, voice slipping low and velvety. Kojiro didn’t know for sure if that tone was an alpha thing, like maybe a faux-command, or a Kaoru thing. He hadn’t heard Kaoru use it until they’d started fucking. “Do you want to try it next time?” Fingers curled around Kojiro’s cock, Kaoru lightly squeezed the head through Kojiro’s shorts. “This does.”

“Yeah,” Kojiro said, a little late, lost as he was with the attention of all three brains focused entirely on Kaoru’s hand. “Let’s level up.”

“Doing okay?” 

“Yes, Kojiro, I’m only stark naked on all fours presenting my ass to you, I’m doing peachy.”

“Just asking,” Kojiro groused, giving Kaoru’s buttcheek an appreciative squeeze. “This is peachy.”

“You are not clever. Now hurry it up, this is embarrassing.”

Kojiro did not hurry it up, petting the back of Kaoru’s thigh. “You sure you’re okay?” He flinched, expecting another acerbic retort.

“I’m fine,” Kaoru grumbled, mashing his face into the pillow so his next words came out muffled. “I promise.” He turned his head. “Our, uh, practice has really helped. I can do this now. And I think at this point it’s our best hope for actually studding you.”

“Okay,” Kojiro said quietly. “Um…”

I love you.

Oh, wait, shit, no.

“Here goes,” Kojiro mumbled.

Slicking up his fingers, Kojiro went to prepare Kaoru like he had so many times recently. He wondered if it was weird to enjoy this, to get hard fingering open his best friend. To get turned on by taking his time, stretching him slowly, watching his glossy fingers slide in and out as he felt Kaoru’s rim start to relax.

Salivating just thinking about it, he smeared slick around Kaoru’s hole, then started to gently press a finger to that tight ring.

And blinked in surprise as it just…slid right in.

“I prepped,” Kaoru said, apparently sensing Kojiro’s surprise. “I figured if my ass was going to be in your face, I wanted it super clean and ready to go. Just, um, you’ll want to get some slick in there, you know. So you get plenty of hormone exposure when you stick your dick in.”

“The way you say that shit without batting an eye yet you threaten to puke on me for holding your hand,” Kojiro muttered.

“That’s because hand-holding is disgusting.”

“Right, right,” Kojiro said, shoving slick into Kaoru’s hole. “So did you just use regular lube?” he asked, swallowing thickly as he watched his fingers slide in and out. Usually he didn’t have such a perfect view and he wondered how long he could drag this out.

“Well I’m not you, I don’t make my own,” Kaoru said. “Should’ve been bottling yours this whole time—that shit’s amazing. And you make a ton. I don’t know how you’re not dehydrated.”

“Mm,” Kojiro hummed, paying way more attention to the slick dribbling out of Kaoru’s hole than whatever Kaoru was actually saying. Kojiro re-coated his fingers, pushing them and the dribble back inside. He reached between his legs again, painting with three fingers down Kaoru’s crack, across his rim, over his taint.

That little hole taunted him—perfectly pink (of course) and glistening with Kojiro’s slick, clenching on nothing as he circled it with a fingertip, inviting him in, wanting filled—

Kojiro licked broadly over Kaoru’s hole with the flat of his tongue.

“Kojiro!” Kaoru yelped, head whipping back to try glare.

“What?” Kojiro stole another, smaller lick. “You do it to me all the time! I’ve always wanted to try it.” He laughed, going in for another long lick, using the length of his tongue.

A tiny moan escaped Kaoru, the sound going straight to Kojiro’s dick. “But it doesn’t work like that, we’re not the same—”

“We’re the same enough,” Kojiro argued, pointing his tongue and circling Kaoru’s rim, trying to see if he could get another one of those moans. He wondered if Kaoru was aware he had started rocking back ever so slightly, trying to fuck himself on Kojiro’s tongue. Fuck, Kojiro wanted him to. “And if we’re trying switch roles and convince my body I’m an alpha, this is a pretty alpha thing to do.”

He tried a couple soft, delicate licks, then tried pressing in just barely.

“Why?” he asked, blowing against Kaoru’s twitching hole. “Doesn’t it feel good?”

“I’m not made like you,” Kaoru insisted weakly. “We’re not the same in there—”

“So it doesn’t feel good?” Kojiro teased, the answer obvious in Kaoru’s rapid breathing and rocking hips.

“No,” Kaoru lied.

Kojiro laughed, sucking Kaoru’s taint. “What if doing it makes me feel good? Can I do it then?”

“You’re going to do it anyway,” Kaoru sulked.

“Mm,” Kojiro hummed against Kaoru’s sensitive hole, letting out a low growl before he started to devour.

He lost himself in mere moments, hypnotized by the sound of Kaoru’s moans and the subtle smell of his arousal. Kojiro was pretty sure he could gorge on this feast forever if Kaoru let him. This was perfection. Lightly sucking his rim, nibbling the smooth skin around it. Licking his own slick out of Kaoru’s hole before sucking off his fingers and fucking more back in with his tongue. 

His dick was so hard it hurt.

“Enough,” Kaoru whined, cutting through Kojiro’s intoxication. “I can’t…anymore…”

“Sorry,” Kojiro said, Kaoru’s rim fluttering against his lips as he placed a final kiss there. “I’m sorry. I went kinda crazy.”

“Yeah you did,” Kaoru said, more needy than angry as Kojiro carefully smeared more slick over his hole. “What the hell?”

Kojiro huffed a laugh, wincing at his oversensitivity he slicked himself up. “I’d wanted to do that since—” forever “—uh, I read about it somewhere. Anyway, I’m sor—”

“You’re not sorry. At all.”

“Well, no. But I’m sorry if it was too much.” He pressed himself against Kaoru’s ass. “Ready?”

To Kojiro’s surprise, Kaoru shifted back against him, enveloping the head of Kojiro’s cock. “Yeah.”

“I am not going to last long,” Kojiro sighed, draped over Kaoru’s back, scattering sloppy kisses across Kaoru’s shoulders.

“I’m kind of surprised you didn’t blow before you got all the way in.” 

“Hey!”

Kaoru laughed, still a little dazed and stunned from Kojiro’s enthusiastic ass-eating. Thank goodness he’d been so anal retentive (uh, no pun intended) about making sure he was super clean for today. But he’d only been so diligent about that because he expected Kojiro to be obnoxious and look too closely. Never in a million years did he think Kojiro would eat him alive.

Hell, he ate ass like an apex predator—maybe they really were studding him after all.

“Well, I thought this position might activate that dormant alpha we’ve been cultivating and he’d come roaring out,” Kaoru teased. 

“Something’s gonna cum roaring, alright,” Kojiro said, more breathy than witty as he began thrusting shallowly.

Kaoru knew he’d responded way too enthusiastically to Kojiro eating him out (fuck, that was going to be spank bank material for a loooong time) but fortunately Kojiro had seemed too absorbed in what he was doing to actually notice. Kaoru had gotten so worked up that he’d nearly reached for his dick, desperate to cum, but thankfully stopped himself in time. 

He was still almost painfully hard but if he let his thoughts drift, he could make it through this. He just had to be careful not to wrap himself in the sound of Kojiro’s cute little grunts and sexy moans or that possessive grip clawed into his hip as Kojiro thrust into him, picking up the pace. Or the hand sliding around his waist, curling around his—

Kaoru gasped, hips jerking.

“Whoa,” Kojiro said, shocked out of his rhythm. He explored Kaoru’s half-swollen knot with curious fingertips. “This is the first time I’ve seen this. Er, felt it.”

“Because I didn’t want you to see it,” Kaoru said, breaking off into a low moan as Kojiro tried a gentle squeeze. “I hate it.”

“Why now?” Kojiro asked. “I—I’ve looked. Other times. But I’ve never seen it. I—I thought maybe you didn’t have one.”

Kaoru thought about swatting Kojiro’s hand away. He did not.

“I’m a little more worked up than the other times,” Kaoru mumbled, barely audible.

It took Kojiro a second to realize what Kaoru was referring to; probably because he couldn’t talk and grope Kaoru’s dick at the same time. 

“You said that didn’t feel good!”

“It did feel good, obviously, which is why I didn’t want you to do it!” Kaoru fired back. “But you did it anyway and this is what happened.”

“It’s a good thing you’re cute because you make absolutely no sense sometimes.”

“You think I’m cute?” Kaoru asked uncertainly.

“What? No,” Kojiro said quickly. “Can I—how do I make this feel good?” he asked, slowly stroking Kaoru’s shaft as he resumed with lazy, rolling thrusts. “Please, Kaoru, I really want you to cum.”

“I don’t need to!” 

“But I want you to!”

“You don’t always get what you want! Now quit trying to distract yourself from finishing too soon and just blow in my ass like you usually do!” Kaoru said, fighting the rising pleasure from Kojiro pumping his cock. 

“I rarely get what I want, when it comes to you,” Kojiro retorted, pressing his chest to Kaoru’s back so he could mouth over his neck. A manipulation tactic, Kaoru knew, but it felt infuriatingly good. Not only did it take advantage of the sensitivity of his neck (pretty sure that would have been an erogenous zone even if he’d been born a normal ass human) but it reacted with that alpha part of him, triggered something deep and primal, making him feel desired, needed, lov—

“Don’t make me say filthy kinky shit to make you pop,” Kaoru threatened, hating his traitorous hips for fucking into Kojiro’s stupid warm hand and back onto Kojiro’s stupid dick.

“Works both ways,” Kojiro murmured, deep and seductive and holy shit, where had that voice come from? Was this position really the key to this whole studding thing after all? It wasn’t an alpha command but it was definitely enough to stoke the fire low in Kaoru’s gut. 

And of course the asshole had to go and make it worse.

“I could say embarrassing romantic shit to make you squirm. Like how beautiful you are, how delicious you smell, how I love those cute little sounds you make.”

“I will laugh in your fucking face—” Kaoru panted.

Kojiro’s voice dropped lower, his hand stroking faster, lips brushing Kaoru’s skin with every word. “How I loved fucking your cute little hole with my tongue and want to feel you cum around my cock—”

“Fucking dammit,” Kaoru cursed, cock pulsing as he shot watery cum from his weak orgasm, ass spasming around Kojiro’s throbbing dick as he came too, emptying himself deep inside. “Don’t get that on your hand,” he remembered to say.

Kojiro just grunted in affirmation, rocking into him, riding out the last spurts before just collapsing on Kaoru’s back, Kaoru flopping belly-down into his own mess on the mattress a second later.

“I win,” Kojiro sighed happily as they waited for their hearts to quit racing. 

“Fucker,” Kaoru grumbled, face half-mashed in the pillow. 

❀

“Is yours always like that?” Kojiro asked Kaoru a few days later, taking a break from skateboarding to split a popsicle. He even now could hardly keep the grin off his face, whereas Kaoru was still trying to act sulky. Which Kojiro didn’t really understand—he knew for a fact Kaoru had felt really really good at the time. Did he have something against feeling good for some reason?

Kaoru stopped mid-lick. “You got a problem with the way I eat popsicles now?”

“No!” Kojiro laughed, crunching his own. “Not that. You know. Your, uh…stuff.”

“My…stuff…” Kaoru repeated, eyes narrowed as he thought. “Are you talking about cum?” he asked incredulously. “Why didn’t you just fucking say that!”

“Sorry!” Kojiro said, laughing again as Kaoru socked him in the shoulder. “Yeah. That.”

“What are you doing checking my jizz out, pervert?” Kaoru scowled. “And besides, I told you not to touch it!”

“I saw it on your stomach when we were cleaning up!” Kojiro explained defensively. “And it was like, watery.”

Kaoru scrunched up his face, licking his popsicle with a wary side-eye at Kojiro as he considered. Kojiro didn’t know what was such a secret that required so much pondering, but he was content enough to wait, pleasantly distracted and maybe slightly aroused by Kaoru orally molesting his popsicle.

“That was like, a half of one,” Kaoru said finally, sliding the last bit of ice between his teeth. 

“A half of one,” Kojiro repeated, not understanding at all.

“Yeah, so. Like, that’s what you get, say, with just kind of a normal, boring orgasm.”

“Wait, that was boring?”

“Fuck’s sake,” Kaoru sighed, rolling his eyes. “Don’t take it fucking personal. I mean boring as in…well, just kinda boring. Not ‘boring’ as in an affront to your alpha masculinity.” He smirked a little at that. “Okay—it’s boring as in knotless. There. Does that make sense?”

“No.”

“Maybe you should’ve read my PowerPoint.”

Kojiro huffed. “Fine, so that’s like…a normal one. So do you never have a not-normal one..? Wait, that just sounded confusing. I mean, you aren’t going around knotting people, right?” Kojiro’s stomach sunk. “Or are you?”

“No!” Kaoru scoffed, giving Kojiro a weak smack upside the head. “When the fuck would I have time, even if I wanted to? Maybe you haven’t noticed but I’ve been pretty busy get dicked down by you.”

“Oh,” Kojiro said, face heating, embarrassed and secretly pleased. “Okay, but if you didn’t knot-cum…you didn’t still have your knot when you got up.”

“You really are checking me out,” Kaoru teased. “Pervert.”

“I’m not gonna be called a pervert from the guy who just grabs my dick whenever he feels like it.”

“Anyway,” Kaoru continued, ignoring that last remark. “No. It, uh, goes down after a while. And since it wasn’t completely filled up at the time, it didn’t take too long to deflate.”

“So, what, it puffs up based on how horny you are?” Kojiro asked, frowning slightly since the only time he’d seen it (hadn’t even seen it, technically, just felt it) was their most recent sexcapade. Was that the first time Kaoru had actually been turned on? 

“Short version…yes? Kind of? I mean, there are other factors and—hey, before you look like a kicked puppy, you do remember the rest of my dick gets hard too, right? The knot isn’t the be-all-end-all here.”

“But coming from your knot is, like, better, right?”

“Well,” Kaoru said slowly. “It’s, um, just kind of different…or maybe more powerfu…” he trailed off, then gave up with a shrug. “Yeah. It’s better.”

Kojiro thought about the implications of that and swallowed thickly before he worked up the guts to ask his next question. 

“So you’ve knotted someone?”

“No,” Kaoru said easily.

“What? But then how do you know how it feels?”

“There are ways to like, simulate it when you jerk—what’s that look for?”

“Show me.”

Kaoru blinked back incredulously. “Show you? You want to watch me masturbate?”

“Yes,” Kojiro said with a serious nod. “Yes I do.”

“Well.” 

Kaoru sat there, mild surprise on his face and Kojiro held his breath, sure that Kaoru would turn him down or laugh in his face. Instead he looked at his watch then back up at Kojiro.

“My place is out; how long till your parents get home?”

Kaoru sat on Kojiro’s bed, naked from the waist down, with Kojiro two feet away staring intently at his dick.

How the fuck had Kojiro talked him into this?

“How the fuck did you talk me into this?” Kaoru asked.

Kojiro started to smile, then caught himself. “Well, if I’m gonna be an alpha, I’ll probably get a knot. And so I need to know how this works.”

“I’m not your sex-ed teacher.”

“But you’re so good at it,” Kojiro insisted.

Kaoru stared back flatly, pissed at how his heart swelled with the praise, however conniving. “I hate you.”

“Do you want me to do it too so you won’t feel embarrassed?”

“No, I need you to pay attention,” Kaoru said bluntly. “And, um, keep in mind it may not even work. The knot doesn’t inflate all the time, you know. It, um. Takes kinda special circumstances.”

“Would a blow job help?”

“No and those are off-limits anyway. The whole point of me attempting this highly scientific jerk off demonstration is for your future knot.”

“What if we get in the position we used the other day? Not actually fuck!” Kojiro hurried to clarify “But, um. Since that’s the only time I’ve even seen it happen, maybe there’s something special…oh! Do you need me to eat yo—”

“No,” Kaoru said emphatically. “But you may be onto something with the other part. Open your legs.” Kojiro immediately did as he was told, so quickly that Kaoru barely snorted back a laugh. 

Settling himself in the V of Kojiro’s legs, Kaoru leaned back against Kojiro’s chest, Kojiro’s chin automatically resting on his shoulder so he could peek over. 

“Alright,” Kaoru said, as much to himself as anyone, “I think this’ll work. Now, um. J-just kinda hang out a sec until I get going and then I’ll explain things.”

“Okay,” Kojiro agreed, a hand already high on Kaoru’s bare leg. Idly thumbing across the soft skin of his inner thigh because of course he couldn’t help himself. But maybe it kind of helped so Kaoru allowed it.

Trying to ignore the fact he was on display, Kaoru started stroking himself, lazy and shallow at first. He closed his eyes, trying to focus, smirking a little at the increasing pressure of Kojiro’s horny grip digging into his thigh. But something was missing—

“Ah, shit,” Kaoru cursed. “Um, do you have…” He held out his hand. “I’m too used to your lube on demand.”

Kojiro’s huffed laugh was hot against Kaoru’s ear as Kojiro shifted, that hand on Kaoru’s thigh never moving while Kojiro presumably stuck his other hand down his pants.

“Here,” Kojiro said, too close to Kaoru’s ear as he resettled and reached around, sliding his fingers over Kaoru’s cock.

Kaoru gasped involuntarily, immediately pissed at how much better that felt. 

“I thought I was doing this,” Kaoru said, trying to sound snotty.

“Tell me what to do,” Kojiro said and there was that fucking voice again! “Or show me.”

“If you don’t do it right I’m taking it away from you,” Kaoru warned, then curled his fingers over Kojiro’s, guiding his hand. “Long and slow at first,” he instructed. “Like that,” he breathed. Despite being the omega, Kojiro’s hands were larger, warmer, and stronger.

And they felt so good.

Fucker.

“Neck,” Kaoru ordered, angling his head. “Do not bite me for real.”

“I know,” Kojiro promised, lips and tongue already against Kaoru’s skin. 

“Now we can go a little faster,” Kaoru said after forgetting for a moment there was an educational purpose to all this. “Slide over the hea—yes,” he breathed, arching back against Kojiro’s chest, grinding his ass against that familiar bulge and shivering when Kojiro groaned in his ear as a result.

Picking up on Kaoru’s reaction, Kojiro moaned as he sucked hard on Kaoru’s neck and Kaoru whimpered, rocking himself into Kojiro’s hand.

“Fuck,” Kojiro groaned, low and guttural and shit just the sound made Kaoru’s hips stutter, so close and the feeling of Kojiro’s hand hitting against his swollen knot with every thrust—

“Fuck that’s hot,” Kojiro growled the same instant Kaoru realized, oh wow, it worked followed very quickly by oh shit, I need to demonstrate.

“So,” Kaoru panted, swallowing and trying to still his hips. “Fuck fuck, stop a sec. Okay,” he tried again, wrapping his fingers around Kojiro’s. “So if you just stay here, at this part, whether jerking off or with a toy or with another person—”

“Boring orgasm?”

“Yes. Normal orgasm and watery jizz,” Kaoru said. “Because this is designed to slide in at the moment of orgasm or right before—” Kaoru guided Kojiro’s hand up, squeezing slightly as they encircled those swollen glands. “And the omega contracts around it—” Kaoru increased the pressure slightly to Kojiro’s fingers and Kojiro took the hint, those unfair hands snugging around Kaoru’s knot. 

“This is amazing,” Kojiro whispered, nosing against Kaoru’s neck.

“I’m glad you think so,” Kaoru laughed, breathy from the pleasure of Kojiro’s hand securely around him. “But as you can see, there is still a little room between the knot and the base of the shaft, so that allows for enough motion to pump the knot and that…”

“Is super cum.”

“Is super cum,” Kaoru agreed. He inhaled deeply and let out a cleansing sigh, gently peeling Kojiro’s hand off his cock. “And there you have it. That’s how it works for when you get your own.”

“You’re done?” Kojiro asked flatly.

Kaoru turned enough to look at him over his shoulder. “Was there something I didn’t cover?”

Kojiro just stared for a moment. “Hands-on practice.”

Which was how they both ended up seated on the edge of Kojiro’s bed, facing his full length mirror as Kaoru sat on Kojiro’s dick while Kojiro jerked him off.

“I can’t get enough of this,” Kojiro said, sucking along Kaoru’s neck and shoulder. Kaoru’s legs were draped across Kojiro’s knees, spread wide open so Kojiro could see everything in the mirror, including glimpses of himself sliding in and out of Kaoru’s ass as they used the bed to help bounce Kaoru on his cock. “Why didn’t you show me this sooner?” 

“Wasn’t important,” Kaoru said, ending with a little moan. “To your studding.”

“Feels pretty important,” Kojiro groaned, squeezing around Kaoru’s knot and loving the little whimper in response. The simultaneous clench of Kaoru’s hole around him was pretty wonderful too.

“You know,” Kaoru said, looking utterly debauched as he made eye contact in the mirror. “If you start inflating, then we really know we’ve done it. But my ass isn’t made to take one of these so if you get carried away and knot me, I’m gonna be pissed. I’m warning you now.”

Things happened slightly backwards, Kojiro succumbing to the visual and Kaoru’s increasingly lewd sounds (half of which were just to fuck with him, he knew) and finishing first. But he slid his hand forcefully over Kaoru’s knot as he came and felt Kaoru’s ass spasm around him erratically as Kaoru’s dick pulsed in his hand, shooting cum far enough to spatter over the mirror.

“See, all that worry for nothing,” Kojiro panted, arms snugging around Kaoru in an attempt to hold them both up, neither ready (or quite able) to stand up just yet. “Told you I wouldn’t get any on my hands.”

❀

Kaoru sighed for the umpteenth time, chin resting on his hand as he listened to the science teacher blather on. 

He might’ve fucked up.

On the one hand, the orgasm the day before had felt amazing. He hadn’t even cum like that when he’d jerked off by himself after their sexcapades, needing to release some pressure. His bones had been jelly after and Kojiro’s arms were right there, squeezing him tight, keeping him safe, holding him together.

Kaoru didn’t know if he’d ever felt that good.

But on the other hand…

The guilt was almost heavy enough to kill him. Kojiro thought they were doing this for a reason. For a very important, very serious reason.

Not because Kaoru was in love with his best friend and this was the closest he’d ever get to his best friend loving him back.

And now the big dummy had to go and learn how to get him off (and Kaoru was a big dummy for teaching him) which just complicated things exponentially. He should’ve just lied and told Kojiro he had some medical condition where it was painful to orgasm and he blew watery loads.

Fuck, why hadn’t he thought of that at the time.

Though, admittedly, Kaoru hadn’t expected Kojiro to pull it off; hell, Kaoru didn’t even work himself up to a knot most times. But something about Kojiro was definitely changing and it was driving him crazy—both in a scientific mystery sense and in a ‘this asshole got way too sexy somehow’ sense.

Even if they had miraculously managed to stud him, Kojiro should have had a transitory period as a beta, not gone straight from omega to alpha. But he still had slick (fuck that stuff was amazing, Kaoru couldn’t get enough of it) and no scent to speak of. 

But he was also more confident, stronger, bolder… bigger . Kaoru realized sitting in between Kojiro’s legs yesterday, back pressed to his chest that Kojiro had gotten taller. Taller than him now, which did kind of piss Kaoru off a little. Not to mention those freaking hands (paws, more like—why were they so huge?). He’d started acting more assertive in bed, too.

And sure, those were the same alpha stereotypes that Kaoru told Kojiro not to put so much stock in, but they were stereotypes for a reason…

Oh, and there was the growling and that fucking deep sexy voice that Kaoru wanted to eat right out of his throat.

Fuck. He had to make sure Kojiro never learned about the voice kink— thing, the voice thing or else Kaoru was so screwed.

“And remember,” the teacher droned at the front of the class, “tomorrow is lab day. So we will have a teacher demonstration followed by hands-on practice…”

Kaoru’s eyes slid to Kojiro’s stupid head at the table in front of him. Like clockwork, Kojiro peeked at him over his shoulder with a little smirk and winked.

Kaoru sneered and pretended to itch his nose with his middle finger, flipping the bird. He tried not to smile to himself at the sight of Kojiro’s shoulders shaking with silent laughter when he turned back around.

No, Kaoru was already so screwed. 

Kojiro turned back around, shifting surreptitiously in his chair. 

Fuck, that little smirk drove him wild. He’d had it bad for Kaoru ever since he could remember but now…

Kaoru was so beautiful it almost hurt. And sexy as hell, like he just kept getting sexier every time they fucked. He’d finally started being a little more vocal and Kojiro could listen to that shit for days, the adorable little whimpers and whines, when his breath started picking up faster and faster, and that moan when he came yesterday, holy shit. 

It was a funny thing, since he had been looking at Kaoru a lot lately, but something about watching him in the mirror, all worked up like that, on Kojiro’s lap (and on his dick) and wrapped up in his arms, neck littered with purple marks from Kojiro’s mouth…he was gorgeous. Maybe more beautiful than he’d ever been. 

Kojiro furtively adjusted himself under the table. Science class—or school in general—was probably not the place to be thinking about how Kaoru’s hair was even softer and silkier, his nipples even cuter and more sensitive (maybe from Kojiro teasing them so much), his skin even smoother and sweeter…

Kojiro swallowed back the sudden onslaught of saliva.

Now if only Kaoru would get his scent back because Kojiro was dying to just cover himself in it. No doubt that had gotten even more erotic too. Maybe one of these times he’d just outright ask why Kaoru didn’t have a scent anymore—

Wait.

Sexier. Softer. Prettier. More sensitive.

And barely any scent.

Oh.

Oh no.

Was Kojiro accidentally bitching his best friend?

Hefting his bag over his shoulder, Kaoru walked slowly to the front gates of the school. After class he’d given Kojiro some bullshit excuse about staying late to work on an art project so he couldn’t hang out—code for “fuck” at this point—this afternoon. 

Maybe he should start an art project just so he’d have an alibi for a few days.

He needed to create some distance, both to get enough clarity to think about this whole thing rationally and also to start weaning himself off so he didn’t have withdrawals when Kojiro didn’t need him anymore.

Kaoru snorted to himself. Create some distance. Yeah, right. Like they’d had any fucking distance since they were five. 

Besides he didn’t want distance, he wanted Kojiro.

With a heavy sigh and judging the shit out of himself for being so pathetic, Kaoru rounded the corner and caught a flash of green, followed by a familiar laugh.

But Kojiro should’ve left almost an hour ago, he had no reason to be loitering right outside the school gates, this didn’t add up—

Flirtatious giggles followed, sinking Kaoru’s heart into his gut. He should just turn and walk the other fucking way and leave the gorilla gigolo to it. After all, the more alpha he became, the more common—even more common?—this sort of thing would be so he might as well start getting used to it—

Out of the corner of his eye, Kaoru saw one of the girls reach for Kojiro’s shirt collar and he saw red.

Kaoru faintly heard snarling and shrieking in the distance, but he couldn’t see a thing and—

“Kaoru!” Kojiro’s voice snapped Kaoru back to the present, one of those large hands on the back of Kaoru’s neck, anchoring him, the other on his arm where—

“Oh shit,” Kaoru breathed, immediately letting go of the girl’s wrist as if burned.  “I’m—fuck, I’m sorry, I thought…” he stammered, physically ill at the tears in her eyes as she looked up at him, absolutely terrified.

Physically ill yet that inner alpha crowed triumphantly—

No! Kaoru swallowed down bile. No, he was better than that!

“I don’t know what I was…” Kaoru tried, choking on the words.

He knew exactly what.

“You didn’t have to hurt her!” One of the girls yelled at him, holding her sobbing friend around the shoulders. 

“I didn’t mean to!” Kaoru said, fully aware that whether he meant to or not, the girl’s arm was already starting to bruise. “I’m really sorry, I didn’t…”  He trailed off, appalled at how easily the alpha brain had taken over, unable to think of even a semi-plausible excuse for nearly yanking someone’s arm off. Unable to think of anything, really, except how much he wanted to bury his face in Kojiro’s neck and—

Kaoru bolted.

When Kojiro caught up to him too-quickly, a detached part of Kaoru’s brain supplied, “Wow. Maybe he really is an alpha now.”

“Kaoru!” Kojiro grabbed him by the arm. “Fuck, shit, wait.”

“I’m sorry!” Kaoru blurted. “I wasn’t thinking—and I know that’s not an excuse, I should’ve had control but it just happened—”

“Kaoru, it’s okay,” Kojiro said, sliding his hand around Kaoru’s neck and pulling him close, resting their foreheads together. “She’s okay, you’re okay, it’s okay—”

“What do you mean, there was nothing okay about that, I just about ripped her fucking arm off—”

“Not even close,” Kojiro said. “She was more scared than anything.”

“What if she’d been a regular human? I would’ve broken her arm,” Kaoru insisted.  “Who knows what I would’ve done if you hadn’t stopped me—” Kaoru broke off, startled by the heated look in Kojiro’s eyes, pupils blown wide. “Holy shit, are you actually turned on by this?”

“Maybe just a little,” Kojiro said, lightly brushing their noses together.

“What the fuck is wrong with you?” Kaoru asked in a whisper, already leaning in, lips parted. This was all he wanted—and all that alpha inside of him wanted, content once again, appeased by having Kojiro close and all to himself.

But for how long?

Kaoru stopped short, almost fucking up and kissing him in public. Almost fucking up and kissing him at all when he was supposed to be “creating distance.”

But he was still rattled, both by seeing Kojiro surrounded by girls—girls trying to touch him, just the thought still started his blood boiling—and by his reaction. He wanted something reassuring, distracting, familiar—

“You done with your art project for the day?” Kojiro asked, thumbing behind Kaoru’s jaw.

“Didn’t take as long as I thought,” Kaoru said with a tiny shrug. He knew what Kojiro was about to ask, knew he should say no—

“Wanna come over and hang out?”

Kojiro idly toyed with Kaoru’s hair as he dozed against Kojiro’s bare chest.

The sex had been…different. Hot, but different. They’d barely made it back to Kojiro’s house before Kaoru was kissing him and trying to shove Kojiro’s shirt over his head.

Kojiro had tried to slow it down as best he could, reassuring with kisses and touches what he couldn’t put into words. But between Kaoru’s feral protectiveness outside the school and his desperate neediness, Kojiro hadn’t stood a chance.

He’d cum with Kaoru’s legs locked around his hips, Kaoru’s arms impossibly tight around him, nails digging into his shoulders and mindlessly chanting Kojiro, Kojiro against his lips.

And while his inner omega had preened at Kaoru’s violent possessiveness and Kojiro had loved the wanton neediness after, he was now almost certain.

Instead of getting studded and becoming an alpha, he was bitching his best friend and turning Kaoru into an omega.

After Kaoru had gone home for the night, Kojiro got on his laptop and started desperately searching for anything he could find on the subject. He didn’t want to become an alpha if it meant Kaoru lost his. Even if Kaoru didn’t seem like a typical alpha (he could practically hear Kaoru yelling at him to quit buying into stereotypes—so now he had both his omega and Kaoru living in his brain apparently) that didn’t mean being an omega would suit him any better. 

He had to stop this—they had to stop this. And try to keep it from getting worse until he could figure out how much damage had been done and how to reverse it…if it was reversible. 

Which meant no more sex—er, “hormone exposure.”

Frustrated at yet another dead end, Kojiro scrubbed his hand through his hair. What the hell was he going to do? No sex and no answers? What the fuck was the stupid internet even for—

And then he found it. Some obscure forum—and there was that story about the guy who turned his friend into an omega with the jizzshakes. This must be the one Kaoru found!

Kojiro pored intently over the entries, looking for an answer to his problem. But nothing quite fit.

Well, if there wasn’t an answer yet maybe he could get one.

❀

As he always did (before, during, and in this particular case, after sex), Kaoru nosed underneath Kojiro’s jaw, taking a deep breath and sighing contently.

Turned out the “no more sex” plan was a lot harder to stick to than Kojiro anticipated. As in, he hadn’t stuck to it at all.

“Anything?” Kojiro asked after a second.

“No.”

Kojiro grunted in disappointment and Kaoru laughed, trailing his fingers along Kojiro’s throat, petting over the dormant glands.

“It’s not the worst thing,” Kaoru offered. “At least you aren’t stinking up the entire room and giving me a migraine like some of the people in our class. Like, is Harry smoking or does he actually smell like weed? Is that just me?”

Kojiro laughed in spite of himself. “No, I smelled it too. I thought maybe he was a pothead but I was standing right next to him the other day and it just flared up out of nowhere. Well, not out of nowhere, the girl he’d been going out with walked by with her new boyfriend and he stinkbombed the entire hallway.”

“That’ll do it,” Kaoru said dryly. “So see, at least you don’t smell like that. Or poor Higa; fuck, I don’t know what he was worked up about a couple weeks ago but I thought I was going to puke from the overpowering flower smell.”

“Yeah I just…” Kojiro’s lips twisted into a frown. “Just would like to know, I guess.”

“Hmm, let’s see…” Kaoru pressed his nose right against Kojiro’s skin and inhaled dramatically. “Ugh,” he said, pulling a face and pinching his nose. “Silverback gorilla. Blech.”

“Asshole,” Kojiro laughed, pinching Kaoru’s ribs and getting a loud squeal right in his ear.

“You might smell like that too—here, lemme get another whiff—”

“Whatever,” Kojiro grumbled as Kaoru giggled, settling back against him. “Hey, um. I’ve…” Well, he’d been meaning to ask about this and no time like the present, he supposed. “Y-you don’t smell like you used to either. Your scent is so faint sometimes it’s barely even there.”

Kaoru just hummed vaguely.

“And, well. I got to thinking…”

“Sounds dangerous for you,” Kaoru teased.

Kojiro just growled playfully and Kaoru laughed, but not before Kojiro noticed Kaoru’s little shiver.

Which unfortunately just confirmed his suspicions.

“No, I was, um..wondering, y’know.  If doing this studs me, then what if…” Kojiro trailed off, heart sinking. No doubt once Kaoru realized, he’d quit the mission altogether and this would be the last time they’d ever be together like this. Or even worse, he’d regret and despise what they just did, what they’d been doing this whole time, and Kojiro for doing it to him—

“Bitches me?” Kaoru asked bluntly, chin in his hand, elbow on the mattress. “We’ve been fucking for months and you just now thought of that?”

“Well…I was kinda distracted…” Kojiro argued weakly.

“Yeah I guess,” Kaoru teased. He shrugged nonchalantly with one shoulder. “Anyway, that’s fine.”

“What?” Kojiro blurted, shocked. “What do you mean, that’s fine?”

“It’s fine,” Kaoru repeated. “I’ve never been particularly attached to alpha-hood and all of people’s expectations. Or the alpha inside’s expectations.”

“I guess…well, you don’t really act like much of an alpha anyway—”

“How many times do I have to tell you to quit putting so much faith in stereotypes!”

Kojiro laughed at Kaoru’s scowl. “No, I mean…well. We’ve fucked. A lot. And you never seemed that into it. Maybe a little more recently, finally, but, um. It didn’t really occur to me until after but…even the first time, you were so, uh…clinical? Like, would an alpha normally be able to just lick an omega’s slick off his fingers like he’s sampling whipped cream or something? It didn’t affect you at all!”

“Right?” Kaoru agreed weakly.

“I gotta admit,” Kojiro continued, wondering why he was going to admit this and not take it to his grave. “It, uh. Almost kinda hurt my feelings at first. Or, y’know, the omega feelings. That you were so uninterested. Not that you can help that! But the omega part didn’t really understand—”

“I loaded up on suppressants and blockers,” Kaoru said quietly. “To numb that part of me as much as possible. I knew I’d never make it through otherwise.” He snorted wryly. “The fact that you still jerked one out of me despite all the shit I’m on surprised me more than anyone.”

Kojiro wanted to gloat about that last bit but— “You’d never make it through? What does that mean? W-why were you all blockered up? Though that explains why I could never really smell you…But why?” Kojiro asked, pained. 

He felt lied to. He would share any part of himself with Kaoru, why would Kaoru hold back such a big part of himself from Kojiro?

“I told you, didn’t I?” Kaoru asked almost sadly. “I already have me in my head, talking constantly. But the alpha…I don’t want to be an animal. I don’t want to be dominated by my instincts and controlled by whatever that alpha voice really is in my brain. It’s still bad enough on blockers and suppressants…but without them, I really would break someone’s arm for daring to touch a mark I left on your neck.” 

“She really was fine,” Kojiro said. “You just scared her.”

“Yeah, and I scared myself,” Kaoru admitted. “That’s the problem. And I maxed out on suppressants to sedate that alpha inside because I didn’t want you to see that and scare you too.”

“But you wouldn’t,” Kojiro insisted. “Even if the alpha part happened to get a little wild, I wouldn’t be scared. Because it’s you.”

Kaoru stared back at him for a long moment, unreadable. “Did you read the PowerPoint?” he asked finally, a tiny crinkle between his eyebrows.

“Huh? No?” Kojiro said without thinking. Then, “Oh wait. Um. Y…yes?”

Kaoru rolled his eyes, radiating…relief? That didn’t seem right. But the tension a moment earlier dissipated with Kaoru’s long-suffering sigh.“I should’ve made you pass a quiz on it as a prerequisite for undertaking the experiment,” Kaoru said dryly.

Kojiro grimaced comically, pulling Kaoru further on top of him and groaning in the crook of his neck before kissing the hollow of his throat and dips of his collarbones.

“Well, if that’s what you’re into, I have some prerequisite right here…” Kojiro offered.

Kaoru burst out laughing—which was what Kojiro wanted, flashing a lopsided grin as Kaoru scrubbed his nails through Kojiro’s hair and against his scalp. Trailing his fingertips down he framed Kojiro’s face with his hands, thumbing across his bottom lip.

“I think I feel your pop quiz against my leg,” Kaoru said with a smirk.

“Huh uh,” Kojiro said, sucking Kaoru’s thumb into his mouth. “That’s my PowerPoint.”

“Oh my god,” Kaoru laughed, knocking their foreheads together. “Enough with the cringy innuendo and just fuck me already.”

❀

Kaoru thumbed across his phone screen, waiting for Kojiro to join him on the school roof for lunch.

He opened the tab to one of the sites he’d found when doing studding research. He’d been debating whether to post their success story—or their progress, anyway. 

There had been a handful of new posts since Kaoru had found the message board during his original investigation, including a long one that ended “tldr I think I accidentally bitched my best friend.”

Kaoru snorted, because despite it indeed being too long and riddled with typos, it had the most promise as far as containing something useful. And maybe he could help this guy with his own experience (though it seemed Anon was trying a lot of tactics similar to what Kaoru and Kojiro were doing but hadn’t seen the alpha-esque changes like Kaoru had observed in Kojiro).  Unfortunately by the end of it he realized no—OP was just in love with his best friend and was too stupid to know it.

However, it proved worth reading because of the reply:

“No, Anon, you did not accidentally bitch your best friend. 

It is chromosomal, in your DNA. All the ‘exposure’ in the world will make absolutely no difference. Extensive research and trials have been conducted (this is my field of study—I’ll include some links for you to check out) and there has not been a single one where studding or bitching has succeeded. Not one.

It is absolutely medically, physically, biologically impossible. The pervasive ‘protein shake’ myth is just that—a myth. It ‘worked’ because the recipient would have presented as an omega regardless. The ingestion of alpha sperm had no actual bearing on the outcome.

And if you’re reading this and still thinking, ‘But why is my friend prettier, softer, sweeter etc?’ I would ask you: is he truly that way or does he just look that way *to you*? Because while slick/sperm exposure won’t affect any of these changes, being in love *will*. :)”

At least the Professor cut to the chase and told Anon what he needed to hear and what every reader was already thinking. But that wasn’t the important part—

For a moment Kaoru just stared at the screen. 

Absolutely impossible. 

Kojiro wasn’t getting bigger, faster, stronger because he was becoming an alpha. It was because he was a seventeen-year-old boy in a growth spurt. He wasn’t more assertive in bed or getting sexier because of successful studding—it was from having tons of fucking sex!

Kaoru huffed an incredulous laugh. That was it. The simplest, most obvious answer was the right one. 

And at some point, probably sooner than later, Kojiro would find that out. That all of their fucking around had just been…fucking around. Hell, this random internet guy could even be him, sounded close enough to their situation except for the whole “best friend being prettier and sweeter and softer part”. Not likely, though; he couldn’t imagine Kojiro bothering to take the time to write out all this and actually read the responses. 

That’s partly why he hid his half-assed confession in his stupid PowerPoint; he knew for a fact Kojiro would never actually read that far if he even bothered to open the damn thing in the first place.

Kaoru couldn’t help but feel a little disappointed. Sure, in the beginning he hadn’t really held out any hope this would actually work. Had actually hoped it didn’t, because then they’d have an excuse to keep doing it for a while. But once he’d started convincing himself Kojiro was changing, he’d actually felt pretty proud of what they’d accomplished.

He thought they had achieved the impossible.

And that meant no matter what, even if it meant losing him, Kaoru was the one who gave Kojiro something that no one else could. 

Fuck, he was such an idiot.

And now, even if Kojiro didn’t see it right away, this information was out there. Conclusive research and absolute fact; Kojiro would hear about it eventually. Kaoru needed to put a stop to this now, before they got in any deeper—

“Whatcha looking at?” Kojiro said from over his shoulder, startling the shit out of him. “Porn?”

“No, I’m not you,” Kaoru blustered, shoving his phone in his pocket and trying to act normal. 

Kojiro just laughed, plopping down next to him, their shoulders brushing. “Hey, um…I was thinking—”

“Oh no is hell freezing over?”

“You don’t have to make that joke every time,” Kojiro muttered, unwrapping his sandwich.

“Sure I do, it’s in my contract,” Kaoru teased, holding Kojiro’s hand still and taking a too-large bite. 

Kojiro shook his head at his sandwich—substantially smaller now—and took a bite of his own. “You are such a fucking nerd,” he said around a mouthful. “Anyway, I was thinking about what you said the other day. A-about the blockers and suppressants and stuff.”

Kaoru’s face fell into something almost too neutral. “Oh?” he asked carefully.

“Yeah. And um. Well. B-before I change, I think I want to try it once.”

“It?” Kaoru repeated with a frown, not understanding. 

Kojiro nodded, looking into his eyes. “I want you to knot me.”

❀

“It is absolutely medically, physically, biologically impossible.”

Kojiro let out a huge sigh of relief, leaning back against his headboard. Kaoru was safe, he hadn’t fucked up. 

Kaoru was safe.

But how long until Kaoru found this same information? Knowing that chronic overachiever, he was combing the internet for new information on how to better refine their experiment and ensure results. It was only a matter of time until he found this reply to Kojiro’s post, full of information and links and graphs and shit.

Would he feel devastated that all their work was for nothing? Embarrassed at being proven wrong? Or would he just shrug and revise his PowerPoint?

What was even in that thing, anyway?

Kaoru had put a lot of work into it—into this whole experiment. Kojiro figured the least he could do was read his stupid presentation. He probably owed Kaoru that much.

Kojiro picked up where he left off months ago, hoping now that the idea of fucking Kaoru wasn’t just a fantasy in his mind but a relatively often-occurring reality he could make it through to the end without getting too horny—erm, distracted. 

Alright, so maybe the sexual language—even presented clinically—reminded Kojiro a little too easily of their research and before he knew it he had a highlight reel playing their sexiest hits in his head and he had to take a quick break. 

Masturbation was fun and all but he was really gonna miss having sex with Kaoru.

Trying to push those thoughts out of his head to keep from getting too depressed, he continued. Um, again.

Reading through the slides he had to admit Kaoru would make a great sex-ed teacher. Too bad it was all wrong.

Then Kojiro finally reached the last slide:

In Conclusion:

Kojiro rolled his eyes. What a fucking nerd. Kaoru didn’t really need to make a sales pitch and present his case for studding when it had been Kojiro’s idea in the first place. Not like he needed to be convinced.

Kojiro, I know this is important to you. I get it. That you’re not happy with the whole omega thing and you got kinda mad at me when I asked if it really mattered. 

But what I meant was: alpha, beta, omega…male, female, gorilla, whatever…you’re still you and that’s what is most important. All that other shit is just extra.

You’ll always be Kojiro and I’ll always love you no matter what.

Kojiro smiled to himself as he stepped onto the school roof. Kaoru was squinting at his phone, too distracted by whatever he was looking at so seriously to hear Kojiro sneak up behind him.

“Whatcha looking at?” Kojiro said from over his shoulder, grinning as Kaoru jerked, startled. “Porn?”

“No, I’m not you,” Kaoru gruffed, shoving his phone in his pocket with a guilty blush. Which meant he probably had been looking at porn, Kojiro figured. He wondered what kind of porn Kaoru enjoyed—wait, no, now was not the time.

Kojiro laughed as he settled down next to him, brushing their shoulders together for a little fortification. “Hey, um…I was thinking—”

“Oh no is hell freezing over?” Kaoru asked.

“You don’t have to make that joke every time,” Kojiro grumbled, unwrapping his sandwich.

“Sure I do, it’s in my contract,” Kaoru said, immediately grabbing Kojiro’s hand and holding it still so he could take the first massive bite. 

Kojiro stared a moment at his sandwich then took a bite of his own. “You are such a fucking nerd,” he said around a mouthful. And I love you so fucking much. “Anyway, I was thinking about what you said the other day. A-about the blockers and suppressants and stuff.”

Kaoru’s face went perfectly still. “Oh?” he asked.

“Yeah. And um. Well.” Kojiro swallowed thickly, sure his heart was about to pound out of his chest. “B-before I change, I think I want to try it once.”

“It?” Kaoru repeated, frowning cutely.

“I want you to knot me.”

❀

This was such a bad idea. 

There were so many logical, correct, appropriate responses to Kojiro that day on the roof. Like, “uh, no” or “are you fucking insane” or just laughing in his face.

Or, hell—the truth: “You’re not going to change, Kojiro, it’s impossible.” That would have probably been the best answer.

But no. Kaoru, in all of his genius, had brilliantly said, “Okay.”

What the fuck was wrong with him!

Kojiro, that’s what. Kojiro was what was wrong with him and had been for like twelve years.

And maybe twelve years would be where it all ended. Kaoru couldn’t imagine Kojiro still wanting to be around him after this. Not after making him promise to be the real Kaoru—no suppressants, no blockers. 

An authentic, real-deal, certified organic alpha knotting.

They’d had to take a short sex-break while Kaoru detoxed his system and waited for the drugs to completely work their way out. Fuck, he should have just lied and said they cleared up in twenty-four hours. Why the hell did he always think of these things too long after the fact?

Probably because it wouldn’t have done any good to lie; Kojiro would have known. He may not have a scent of his own but he could certainly smell Kaoru. He’d know if Kaoru was hiding something, if his scent was weak or off or partially suppressed.

And, well. Kaoru had betrayed his trust enough. If this was what Kojiro wanted…

Kaoru’s parents were gone overnight, some fancy pants event on the mainland. Normally Kojiro would just walk home with him after school but he’d mumbled some bullshit about needing to stop by his house first. Which was fine—Kaoru needed a little time alone anyway to try to get himself together.

Which obviously hadn’t worked, if getting the shit startled out of him by the doorbell was any indication.

“Hey,” Kojiro said when Kaoru yanked open the door, annoyed at being scared. His hair was darker than usual, still a bit damp from taking a shower. As Kojiro stepped over the threshold and into his space, Kaoru sniffed in spite of himself; Kojiro smelled clean and warm.

And excited.

Kaoru licked his bottom lip, salivating.

Fuck, this was such a bad idea.

“O-oh,” Kojiro said, eyes widening slightly as the smell of Kaoru’s arousal hit him. “Just look at you…” His eyelids fluttered briefly as he took a deep breath, inhaling the pheromone-laden scent Kaoru was already dumping into the air, and broke out into a slow grin. “Fuck, this was such a great idea.”

Kaoru pushed him against the door, growling into Kojiro’s mouth as he kissed him. 

No, it was not a great idea, but Kaoru didn’t feel like explaining that to this big, delicious idiot now when he could just kiss him instead. He wasn’t entirely sure how he would survive this; the alpha inside was already trying to break free and take over, spurred on by the taste of Kojiro’s eagerness. 

Making out right at the front fucking door was not what Kaoru had planned but the smell of Kojiro’s anticipation was more than he could resist—

It was Kojiro palming his ass and lifting him up that snapped Kaoru back to his senses. 

“What are you doing?” Kaoru asked, automatically locking his ankles around Kojiro’s waist. 

“Bedroom?” Kojiro supplied. “You don’t want to do this right in the entryway, do you?” he asked, walking them to Kaoru’s room. “Although that might be hot in its own way—”

“B-but—” Kaoru stammered, trying to say something about being just picked up and physically carried to his room but he got distracted with the sudden need to lick the length of Kojiro’s neck instead. “Guess you really have been lifting.”

Kojiro laughed, a little breathy, shutting the bedroom door firmly behind them and leaning against it. Then he tilted his head up for another kiss. 

Kaoru tried to go slowly, he really did. But those stupid giant hands were kneading his ass and every time he writhed a little against Kojiro’s stomach, he smelled the tiniest hint of Kojiro’s slick and it was driving him insane. 

He wanted more.

“If—” Kaoru tried, breaking off the kiss and standing on his own. His hands immediately slid under Kojiro’s shirt, rucking it up as his fingers traveled over Kojiro’s abs and up to his chest. “If it’s too much—” 

“It’s not,” Kojiro promised, heartbeat thundering under Kaoru’s fingertips. “Quit holding yourself back—”

“If it gets to be too much,” Kaoru said again, because this was important. “Run. Well. Leave. Don’t actually run or you’ll trigger the alpha’s prey drive—”

“Kaoru.” Kojiro nosed under Kaoru’s jaw, dusting kisses along his neck and rubbing his cheek against Kaoru’s gland there, covering himself in Kaoru’s scent. 

Mine mine mine, that alpha voice growled possessively in Kaoru’s brain, then quieted, momentarily appeased by Kojiro’s gesture.

“I’m not gonna run—though having you chase me down and ravage me does sound kinda sexy—”

Kaoru tried to look annoyed instead of just dangerously horny. “Don’t say shit like that,” he warned, pinching one of Kojiro’s nipples for emphasis. 

“I like this,” Kojiro said with a sly smile, running a hand through Kaoru’s hair. “About time this was an even fight.”

“Fight?” Kaoru asked, raising an eyebrow and trying not to nuzzle into Kojiro’s hand. “Like you could win in a fight against me.”

“Because you’ve been cheating the whole time. Fucking sneak,” Kojiro teased, pulling his shirt over his head. 

Kaoru stared at Kojiro’s chest, grazing his nipples as he palmed a pec in each hand, giving a squeeze. 

“Your boobs got bigger again.” Kaoru flicked his tongue over a pebbled nipple and he swore he could taste Kojiro’s excitement. “More sensitive too.”

“Maybe a little,” Kojiro admitted with a slight moan.   

After a few well-placed bites across Kojiro’s chest, Kaoru sucked a mark over Kojiro’s collarbone and worked his way up enough to lick a broad swath up his neck. 

“Bed,” he said, flicking his tongue in Kojiro’s ear before nipping at his earlobe. “Now.”

Kaoru didn’t wait for him to comply, practically pushing Kojiro down onto his bed, climbing over him. 

Kojiro’s inner omega shivered in anticipation, thrilled by the feeling of being hunted and stalked, trapped underneath Kaoru to be teased and toyed with before being devoured. And by the ravenous look in Kaoru’s eyes, he was about to be eaten alive.

He couldn’t wait.

“I love this part,” Kojiro breathed, wrapping his hand around the back of Kaoru’s neck and pulling him into a kiss. 

“I love this part,” Kaoru said against his lips after a second. Then he leaned back and yanked off Kojiro’s shorts, eyes darkening as the smell of Kojiro’s slick hit him anew. 

“Right,” Kojiro groaned, cock twitching at the sight of Kaoru’s tongue darting across his bottom lip. “I, uh…this part is pretty good too.”

“Now where was I,” Kaoru whispered almost to himself as he shucked his own shirt, straddling Kojiro’s hips and running splayed fingers over Kojiro’s torso. Then he leaned forward, grinding against Kojiro’s erection, and sucked a nipple between his teeth.

When they first started fucking around, Kojiro had been embarrassed by all the sounds Kaoru managed to pull out of him. But he didn’t care anymore—he loved this, loved the feeling of Kaoru’s mouth worshipping his chest, the soft lips pressed to his skin, that sinful tongue licking over him, the unabashed way Kaoru teased his nipples and sucked on his tits, the vicious nips and bites littering marks over his pecs. 

Made all that lifting worth it.

And now he could smell Kaoru’s contentment as he worked him over, claiming Kojiro with scent and saliva.

Kaoru had never dreamed it would be like this. 

He’d had his mouth all over Kojiro in recent months, and while he enjoyed that immensely, it didn’t hold a candle to actually tasting him. The flavor of Kojiro’s rising desire coated Kaoru’s tongue with every lick and he couldn’t get enough of it. He wanted more, wanted it all, wanted to taste everything—

Scooting down, Kaoru settled himself between Kojiro’s knees and slid his hands up Kojiro’s thighs, scraping lightly with blunt fingernails, goosebumps rising underneath his fingertips.

A low growl forming in the back of his throat, Kaoru sunk down and nipped at the sensitive skin of Kojiro’s inner thigh. He followed with a broad lick over the purpling mark—

Fuck, it was so good.

“Fuck, why is that so good,” Kojiro groaned as Kaoru sucked over his thighs. Kojiro opened his eyes (why did he keep closing them?! He wanted to watch this!) and looked down, always hopelessly turned on by the vision of Kaoru between his legs. But the sight of Kaoru alternating long, obscene licks over his thighs with rubbing his face over the glands there, scenting him, claiming him—

He might nut just from watching.

“I can smell your slick,” Kaoru murmured, face flushed and pupils blown. He nosed against Kojiro’s clothed cock then mouthed along his shaft, spit soaking the fabric. “So delicious. So ready.” Kaoru palmed Kojiro’s sack through his boxers.

“I can take those off—” Kojiro offered, arching slightly to press himself into Kaoru’s hand.

“So can I,” Kaoru said simply, digging his fingers into Kojiro’s underwear and ripping them apart.

“Holy shit,” Kojiro breathed, painfully excited. “That was…” He swallowed, unable to think.

“You’re not the only one who’s been lifting,” Kaoru said wryly.

Kojiro huffed a laugh, taking too long to get the joke because his brain was definitely not in his skull at the moment. He let out a groan as Kaoru wrapped expert fingers around his cock.

“Not gonna bitch at me for grabbing it without asking?” Kaoru asked.

“N-nah,” Kojiro tried, eyes closing of their own volition. “You’re a…investor or whatever, co-owner…”

“Pretty sure I’m a majority shareholder by now,” Kaoru said, sounding way too sexy for saying something so dorky. He licked the entire length of the underside of Kojiro’s dick, swirling his tongue around the tip. “It’ll be all mine by the time I’m done. Prepare for a hostile takeover.”

“F-fuck,” Kojiro half-laughed, half-moaned, definitely judging himself for getting turned on by nerd talk, a fresh rush of slick leaking from his hole. “You’re such a nerrrdddfuck,” he cursed as Kaoru took him in his mouth.

Kaoru hummed around Kojiro’s cock, working to fit all of him. He’d practiced this, wanting the feeling of taking him in, swallowing him whole. And now that his senses were free, no longer inhibited by blockers and suppressants, he was so glad he’d made the effort. The taste of Kojiro was everywhere, filling his mouth, dripping down his throat. Want and need permeated Kaoru’s brain, on his tongue and in his nose as he brushed the short curly hairs at Kojiro’s base.

Kojiro was drunk on the smell of Kaoru’s scent filling the room, rubbed onto his thighs and his face and his chest, and the feeling of Kaoru’s throat swallowing hot around his dick.

Without thinking, he reached down and petted through Kaoru’s hair, completely unprepared for Kaoru to look up at him with simmering eyes and whine prettily over his cock.

“Fuck,” Kojiro cursed, hips bucking. 

With a hungry moan, Kaoru pulled off, lapping at the head before taking him back in halfway. Deft fingers cupped Kojiro’s sack before rubbing over Kojiro’s taint, already coated with slick. Still fucking Kojiro with his mouth, Kaoru slid his fingers between slick cheeks and teased Kojiro’s hole.

He whimpered obscenely on Kojiro’s cock when his finger easily slid inside.

“Yes,” Kojiro said in a breathy whine, hips canting to push himself onto Kaoru’s hand. “Yes.”

It had been so long since he’d had anything inside and it felt so good to be entered, all of those nerve bundles special to omegas overloaded with pleasure at finally being touched.

“More,” Kojiro panted.

But he wanted more—

Oh, shit, he’d said that already.

Kaoru growled, the vibration reverberating through Kojiro’s cock, then added another finger.

“So good,” Kojiro moaned, rocking in time with Kaoru’s fingers pumping him and his mouth sucking him down. “So good—fuck—”

He came too quickly, spilling down Kaoru’s throat in a matter of minutes.

Kaoru slowed his fingers, easing Kojiro through the aftershocks of his orgasm, lazily licking the last drops of cum dribbling out of Kojiro’s dick as the spasms around his fingers stopped. Half drunk on the feeling of Kojiro, warm and wet around him, Kaoru rubbed his face against Kojiro’s thighs, sucking lazily and marking them with more hickeys.

Mine mine mine, the inner alpha gloated possessively.

“More?” Kojiro asked hazily, sigh turning into a groan as Kaoru slid his fingers halfway out of his wet hole then pressed one back in. “I need more. I want you.”

“Is that you or your omega talking?” Kaoru asked, sucking the sensitive skin below Kojiro’s navel as he fingered into him one more time before pulling out completely. He licked a swath up the crease of Kojiro’s thigh, biting his hip bone then worked his way up.

“Both,” Kojiro said, reaching for Kaoru and pulling him in for a sloppy kiss. He was a little too fucked already and tried to kiss and talk at the same time, “We’re not separate. We’re the same.”

It took Kaoru too-long to process that, absorbed in the taste of Kojiro’s mouth, the flavor of truth and happiness and horniness all coming through. 

“But I thought this whole thing was because you didn’t feel like an omega,” Kaoru said into Kojiro’s mouth.

“I didn’t,” Kojiro answered against his tongue. And for the moment that appeared to be the extent of it, Kojiro kissing him greedily, occasionally grinding against Kaoru’s leg between his marked-up thighs. 

The scent of Kojiro’s arousal started to cloud Kaoru’s brain, stoking the alpha within. Hips rolling of their own volition, Kaoru rutted lazily against Kojiro’s thigh, spurred on by Kojiro’s teeth grazing his neck, pleasure mounting with every teasing play-bite over his scent glands.

“Mine,” Kaoru rumbled, tongue over Kojiro’s dormant gland, teeth sinking in—

He jerked back, eyes wide with panic.

“What’s wrong?” Kojiro asked, hand petting down Kaoru’s back.

“I almost bit you!” 

“Uhhh we bite each other all the time?” Kojiro said, glancing down at his chest, riddled with hickeys and imprints of Kaoru’s teeth. 

“Not a fucking claiming bite!” Kaoru said, angry at himself that he came so close to fucking up. 

“It’s fine,” Kojiro assured him, curling his hand around Kaoru’s neck and trying to pull him back down for a kiss; Kaoru resisted, pressing his lips together. Still, Kojiro’s omega preened at the thought of Kaoru claiming him, fresh slick already dripping down his thighs. “It’s temporary anyway, the claim only lasts as long as the bite.”

“Unless you’re fated, then it never disappears and lasts forever!” Kaoru snapped, Kojiro pressing insistent kisses to the corner of his mouth.

“You think we’re fated?” Kojiro asked with a hopeful lilt, licking along Kaoru’s neck. If Kaoru didn’t want to kiss him and argue about stupid shit instead, fine. But his omega was beyond turned on just at the thought of being claimed by his fated mate and he had to have some part of Kaoru in his mouth immediately.

He sucked hard over Kaoru’s gland, temporarily sated by the flood of Kaoru filling his mouth, despite the slight prickliness of Kaoru’s scent at the moment.

Kaoru opened his mouth to answer, to say no—

I’d give anything to be.

But he couldn’t say that and stupid horny Kojiro was sucking on his neck again and his stupid inner alpha loved it and just wanted to claim him and fuck him and mate him until they were both so spent they couldn’t move. 

It was getting harder and harder for Kaoru to remember why that was a bad idea.

Especially with Kojiro’s hand kneading his ass and knee bent between Kaoru’s legs, pushing him up, so he could nibble on Kaoru’s neck and collarbones with sexy little rumbles and purrs. 

“I want that too,” Kojiro said, nosing under Kaoru’s jaw.

Kaoru frowned, confused and frantically trying to think of the last thing he’d said—

Oh, fuck—had he fucked up and said that whole bit about “claim him and fuck him and mate him” out loud?

“You can’t possibly—” 

“I can and I do,” Kojiro said, kissing wherever his mouth could reach. “So please quit trying to hold back. You don’t need to fight it.” He smiled sadly. “I wish I had a scent so I could reassure you or entice you that way but…”

He trailed off, surprised when Kaoru kissed him softly.

“I’m plenty enticed,” Kaoru whispered, voice low and seductive. He licked across Kojiro’s bottom lip, nipping gently. “That’s the problem.”

The kiss quickly grew more heated, Kaoru’s fingers soon knotted in Kojiro’s hair and digging into his shoulder. All the prickliness in Kaoru’s scent vanished, replaced with…

Lust.

Kojiro groaned into the kiss, overwhelmed by Kaoru’s mouthwatering scent. Wrapping a leg around Kaoru’s waist, Kojiro lifted his hips, no doubt wetting Kaoru’s pants with his slick where he pressed against him, trying to urge Kaoru inside. 

Slender fingers trailed down Kojiro’s shaft and he gasped against Kaoru’s tongue as Kaoru slid his fingers over his rim.

“You’re a mess,” Kaoru said, licking into Kojiro’s mouth as he smeared slick over his taint, his sack, his dick. To Kojiro it sounded almost like a compliment—and maybe it was, judging by how pleased Kaoru smelled.

Kaoru barely resisted the urge to suck that sweet slick off his fingers, but he knew if he did that he’d truly go crazy. The smell of Kojiro’s desire was already growing dangerously potent—and here Kojiro had worried about enticing him? 

Sitting up, Kaoru quickly stripped out of his pants and underwear then gracelessly spread Kojiro’s legs, salivating as he trailed his fingers around Kojiro’s flinching rim. 

“Do we need to work you ope—” Kaoru started to ask.

“No,” Kojiro cut him off. “I’m made for this. Omegas are.” His dick twitched in excitement as Kaoru propped one of Kojiro’s legs over his shoulder, straddling the other and lining himself up with Kojiro’s waiting hole.

Kaoru thought he should probably say something, some final warning, ask one last time if it was okay. But Kojiro’s hole fluttered, shimmering with fresh slick, just waiting for him. 

So Kaoru breached Kojiro’s rim, sinking in slowly until he was buried to the hilt, and for a moment their world stopped.

Kaoru was afraid to move, enveloped by tight, wet heat and fuck, Kojiro was right, he was made for this. The feeling of Kojiro around him, eager and inviting, soft and slick was enough to make Kaoru lose his mind. 

Kojiro sighed blissfully, finally full, full of Kaoru everywhere. Inside, deliciously hard and stretching; outside blanketed in pheromones—protective, possessive…and aphrodisiac. 

Then Kaoru started to move.

“Yes,” Kojiro groaned, arching as Kaoru found a rhythm and hit deep. “Yes, fuck—fuck, why is your dick so good—”

“Made for this,” Kaoru ground out, picking up the pace. 

“Fuck yes,” Kojiro panted, moaning obscenely when Kaoru turned his head to bite the leg propped on his shoulder. Fuck, he wanted Kaoru to bite him everywhere. Mark him up until he looked like Kaoru’s personal chew toy. His hole clenched enthusiastically at the thought.

“Shit,” Kaoru breathed, hips stuttering, caught off guard at Kojiro tightening around him. “You feel so fucking good.” He wrapped his fingers around Kojiro’s dick, trying to stroke him. “I want to feel your hole around me when you cum.”

Kojiro just nodded, wrapping his fingers over Kaoru’s and pumping himself faster as Kaoru thrust into him. 

“Fuck yes, harder,” Kojiro said, one hand on his dick (or on Kaoru’s hand on his dick) and the other pinching his own nipple. 

“You always do that?” Kaoru asked, swallowing back drool at the sight of his slick-shiny dick sliding in and out of Kojiro’s perfect hole while Kojiro played with himself.

“Lately,” Kojiro admitted, half-opening his eyes to see Kaoru staring at him predatorily, lips parted in blatant desire, and his hand faltered. “‘S not as good as when you do it, though. When you suck on ’em.”

Kaoru thrust hard at that, caught by surprise, and Kojiro groaned appreciatively, so Kaoru did it again.

“Knot,” Kojiro whined, hand jerking furiously.

“No,” Kaoru gritted out, leaning forward to stretch Kojiro’s leg and angle deeper. 

“Not until you cum on my cock.”

Kojiro grunted, cum pulsing from his dick in his hand, shooting over his own chest. The exquisite feeling of Kojiro’s hole clenching erratically around Kaoru’s cock pushed Kaoru over the edge and he emptied himself deep inside Kojiro. 

Chest heaving, Kojiro flopped his hand on his stomach, barely mustering a twitch of a sneer when he forgetfully landed in his own cum. Slowly, Kaoru lowered Kojiro’s leg off his shoulder after giving the inside of Kojiro’s knee an absentminded kiss.

“That wasn’t a knot,” Kojiro said once he caught his breath, eyes still closed. Closed again? He couldn’t fucking keep track. “Did you fill me full of boring orgasm?” he mumbled, too fucked out to sound properly sulky.

“No, it was really…good…” Kaoru didn’t bother finishing his sentence, bracing himself with a hand atop each of Kojiro’s thighs to watch as he eased out.

The sensitive skin of Kojiro’s inner thighs was covered in Kaoru’s marks and shiny with slick and sweat, just the sight making his dick stir with excitement. But then he nudged them a little further open to get a better look, spreading Kojiro’s slick-drenched cheeks with the fingers of one hand to expose his hole.

He stared at his pale milky cum leaking from Kojiro’s ass, mixing with Kojiro’s slick and dribbling down his crack. His cum. 

Mine mine mine, the alpha growled.

Kojiro’s eyes snapped open, biting back a whimper at the overwhelming scent of feral alpha desire pouring over him. Kaoru’s feral alpha desire, which had been kept so tightly controlled that Kojiro wasn’t sure it even existed. It was more intoxicating than he could have imagined; his eyelids fluttered, already wanting to melt, submit, be fucked and filled again. 

“Kao—ru!” Kojiro yelped as Kaoru bent him in half, hands on the back of Kojiro’s thighs, shoving his knees into his soiled chest and raising his ass—

Kaoru swiped his tongue over that slick-glossed hole, tasting their combined flavor.

“Holy shit,” Kojiro breathed, holding his legs to give Kaoru easier access, ridiculously turned on by Kaoru’s alpha strength.

Half crazed from the taste, Kaoru licked over him again. And again. This was them, their flavor, mingled together, bitter and sweet and velvety and perfect and he couldn’t get enough of it. Combined with the needy sounds Kojiro was making—not even real words anymore, just moans and whines, curses and pleas—and the feeling of that hole against his tongue, desperately begging to be fucked, he just couldn’t stop.

Kojiro came again, fucked by Kaoru’s tongue.

“Open your mouth,” Kaoru said, swiping Kojiro’s rim one last time before releasing his hold, lowering Kojiro’s ass back down. 

“Huh?” Kojiro asked, foggy and dazed, mouth already open from all the panting and moaning. Belatedly, he let go of the backs of his thighs, muscles burning as he extended his legs against Kaoru’s mattress.

Kaoru licked into Kojiro’s mouth—his own slick he recognized from sucking it off Kaoru’s tongue many times before. But the other…

“That’s us,” Kaoru explained, kissing him deeply, feeding it to him. “That’s what me inside of you tastes like.”

Then Kaoru realized he’d just eaten his own cum out of his best friend’s ass and forced him to taste it and Kojiro was going to fucking hate him—

Sheer happiness filled Kaoru’s nose, nearly choking him as Kojiro hummed against his lips.

How could Kojiro—or Kojiro’s omega? He said something earlier about being one and the same but how could that be?—be happy about this? But the scent was undeniable—as was Kojiro’s tongue in his mouth, searching for more, and his dick, already hard again, trying to lazily hump against Kaoru’s leg.

And that fucking alpha inside of him, always lurking, always trying to dominate, puffed up with pride. 

Mine, mine, mine. My omega is happy.

And for the first time since presenting, Kaoru wondered if maybe he and the alpha weren’t separate. What if…

Afraid to speak it—though Kojiro seemed way too fucked out to notice anyway—Kaoru thought to himself, Mine. My Kojiro is happy.

And the alpha—no, his alpha started purring so loudly inside Kaoru’s brain? heart? wherever the hell inside him his alpha lived, that Kojiro felt it, smelled it, and started purring back.

Kaoru rubbed his face against Kojiro’s neck, feeling that purr vibrate against his lips, his tongue as he sucked the soft skin underneath Kojiro’s jaw, tasting his satisfaction. His happiness. 

His need.

Kojiro could feel the moment Kaoru changed. Felt something deep in his chest, pulling a purr out of him to resonate with Kaoru’s alpha, finally, truly freed after years of being chained and caged.

His omega was ecstatic. 

As was Kaoru’s alpha, judging by the heady, erotic scent filling Kaoru’s bedroom.

“You smell amazing,” Kojiro said dreamily. “I just want it all over me. Inside and ou—” he broke off in a yelp as Kaoru just flipped him over with an impatient growl.

Without really thinking, he raised his ass, eagerly presenting himself.

Kaoru licked over the new outpouring of slick dripping over Kojiro’s hole, nipping an asscheek before pressing a hand firmly on Kojiro’s low back, settling him back against the bed. 

“Not yet,” Kaoru said, sucking a mark right above the cleft of Kojiro’s ass. 

“But I want it,” Kojiro argued weakly.

“After I mark you,” Kaoru promised, intoxicated from the taste of Kojiro’s skin against his tongue, the feel of muscle as he sank his teeth in. Licking up Kojiro’s spine, he smiled as Kojiro rolled his hips, trying to find some relief rutting against Kaoru’s sheets, face buried in Kaoru’s pillow.

Kojiro groaned, face smooshed against the pillowcase and inhaling deeply, overwhelmed with Kaoru’s oral assault on his back. This…this was new. And the thrill of Kaoru marking him, hovering over him, covering him sent slick pouring down his thighs.

Kissing and biting along Kojiro’s delectable shoulders, Kaoru ground his hard cock against Kojiro’s ass, pressing into the cleft of slick cheeks. Kojiro kept arching back against him, desperately trying to get him inside.

Lying heavy along Kojiro’s back, Kaoru nosed behind his ear, softly licking over oversensitive skin before sucking viciously. With a sensual moan, Kojiro arched underneath him, knees spread wide.

Kaoru slammed into him, mounting him.

“Fuck—Kaoru—alpha—yes,” Kojiro blubbered, drooling onto Kaoru’s pillow as Kaoru fucked him. Kaoru’s dick felt fuller, bigger, deliciously heavy as it carved into him again and again, relentlessly stimulating the erogenous nerve bundles in Kojiro’s slick omega walls.

Gripping into Kojiro’s hips, Kaoru rocked into him over and over, entranced by his cock sliding in and out of Kojiro’s sensual hole. He loved Kojiro this way—panting into and huffing the pillow hugged to his chest, the expanse of that mouthwatering back on display, covered in Kaoru’s possessive bites and marks and the scent of his spit, ass up, begging to be fucked—

To be knotted.

Kojiro whimpered, needy and obsessed with the smell of Kaoru’s knot and the pressure of it rhythmically pounding against his rim, teasing him, threatening to breach him.

“Kaoruuu,” Kojiro whined.

Kaoru thrust faster, harder, so close. Kojiro’s walls undulated around his dick, gripping him, sucking him in. Desperate moans and ragged pants filled the air in harmony with the lewd squelch of slick as it covered his cock and oozed out of Kojiro’s hole, dripping down his sack and coating Kaoru’s hips where he slammed into Kojiro’s ass.

The scent of their mingled lust and desire permeated the air, so thick Kaoru could taste it.

“Knot me, Kaoru,” Kojiro begged.

Kaoru shoved closer, pressing his chest against Kojiro’s back, so close—

He wrapped his arms around Kojiro for leverage, one hand clawing into Kojiro’s tit and the other gripping his shoulder as he locked Kojiro in his arms, holding him still to fuck into him faster, Kojiro’s soft, slick rim pressing against his knot with every thrust, so fucking close—

With a loud growl, Kaoru bit down hard on Kojiro’s gland as he thrust all the way in, Kojiro’s cry of ecstasy filling Kaoru’s mouth as he came, filling him impossibly deep.

Kojiro’s hole spasmed erratically around Kaoru as he came, clenching around his dick, his knot, as Kaoru still held his skin between his teeth, sucking in rhythm with the shallow roll of his hips. 

Kojiro could feel everything: the orgasmic stretch of Kaoru’s knot, the fullness of being plugged as Kaoru pumped cum into him, Kaoru’s dick still pulsing as Kojiro’s hole greedily milked his final spurts.

The feeling of Kaoru draped across him, covering him, mounting him. The shared tremble in their thighs before they both collapsed down, knotted together, landing in a puddle of Kojiro’s cum.

The happy warmth of Kaoru’s claiming bite on the juncture of his neck.

Rummy and content, sedated from pheromones and exertion, they lightly dozed off as they waited for Kaoru’s knot to deflate.

“Mm,” Kaoru nuzzled against the back of Kojiro’s neck as he woke, shifting his hips experimentally.

Kojiro groaned, drooly and still mashed against Kaoru’s pillow. “You mean we could’ve been fucking like this the whole time?” he mumbled.

Kaoru snorted, mind clearing from the fog of sex and their little snooze after. “No. Even with both of us on contraceptives, this was really stupid—”

“I don’t mind,” Kojiro sighed, still blissed out. “I’m okay with having your babies.”

“Gross!” Kaoru laughed, smacking him weakly in the shoulder, pretending he didn’t see all the vicious marks ravaging Kojiro’s back. 

“Yeah but I felt you twitch in there when I said it—”

“The timing was sheer coincidence, I assure you,” Kaoru said, holding his breath as he eased out, thunking his head onto Kojiro’s shoulder as soon as Kojiro rolled over and opened his arms. “That was a random involuntarily muscle reaction and had nothing to do whatsoever with whatever stupid shit flew out of your mouth—”

“I read your PowerPoint,” Kojiro cut him off, running his fingers through Kaoru’s hair.

Kaoru went perfectly still in his arms. “And?”

“And don’t get mad at me,” Kojiro said slowly, “because I know you’ve really worked super hard on this research, and I know I’ve been changing and we’re super close to the goal—”

“No, we aren’t,” Kaoru said, pained, looking up at him. “Kojiro, the goal is physically, medically, scientifically impossi—”

“But are you up for changing me back?” Kojiro interrupted. “I imagine it’ll take at least as much effort to undo all we’ve done already. Maybe more. Hell, we were so dedicated to our experiment that the damage may be damn near irreparable, it could take years to fix this, maybe even the rest of our lives to turn me back into an omega—”

“You are such a fucking idiot,” Kaoru laughed wetly, kissing him.

“Is that a yes?” Kojiro asked between kisses, smiling against Kaoru’s lips.

“Yes,” Kaoru answered. Then he smirked, a wicked glint in his eye. “I’ll bitch you back into the best omega ever. Perfect omega, just for me.”

Kojiro groaned, already turned on at the thought. “Can’t wait,” Kojiro said, kissing him deeper. “But no breaking anyone’s arms now.”

“Not making any promises,” Kaoru said simply, sucking Kojiro’s earlobe.

Kojiro burst out laughing, then nipped along Kaoru’s jaw. “I can already tell my next heat is gonna be fucking phenomenal.” He grinned at Kaoru’s snort, sucking a mark into that pale neck, tasting springtime and happiness. “We should probably start training, actually.”

Resting on Kojiro’s sweat-damp chest after round two, Kaoru buried his nose in the crook of Kojiro’s neck and melted against him as he breathed in deep over the prominent mark left by his teeth.

It matched the one Kojiro had bitten into him moments before.

“Not that I mind,” Kojiro said, “but I’ve always wondered—why do you do that if there’s no scent?”

“I think I’m getting kind of addicted to the no-scent thing,” Kaoru said, lazily licking over the bite before taking another long inhale, exhaling with a satisfied sigh. “It’s kind of like if you smelled like fresh air.” Kaoru stiffened. “Ah.”

“Ah!” Kojiro blurted as they looked at each other wide-eyed.

“Holy shit, we’re idiots—” Kojiro started to laugh, squeezing Kaoru to him.

“You are an idiot, I’m not—” Kaoru blustered.

“I’m yours,” Kojiro said, grinning ear to ear. “I—I’m yours, my scent was made for you!”

“Are you crying?” Kaoru asked with a laugh as he thumbed the corner of Kojiro’s eye, kissing the unshed tear in the other.

“I’m so relieved,” Kojiro breathed, still smiling, trying to hold Kaoru’s face and touch him and kiss him and—

“See, you are the idiot,” Kaoru said, kissing him. “You were mine this whole time, you just didn’t know it.”

“I am the idiot,” Kojiro agreed, pressing a soft kiss to the claiming bite he’d left on Kaoru’s neck. “You were mine the whole time and I didn’t even know it.”

Totally Unnecessary Epilogue

“When are your folks getting home?” Kojiro asked, scratching his belly as they wandered into the kitchen the next morning. 

“Dunno,” Kaoru answered, digging in the refrigerator. “Sometime this afterno…on…” he trailed off, frowning slightly as he caught a stale whiff of his mom’s amusement.

“Uh, Do you always have the giant mega econobox of birth control right on your kitchen table?” Kojiro asked, waggling the box in his hand.

“No,” Kaoru snapped, snatching the note taped to the top of the box.

Darlings—

This house absolutely REEKS so dad and I have decided to extend our vacation a few days.

Do what you have to do to air it out before we get home.

And while I’m sure that you two will have the most adorable children SOMEDAY , I am far too young to be a grandmother NOW . So I’ve left some supplies. USE THEM.

Love,

Mom