Work Text:
It takes a few months for Shinsou to feel accepted by class 1A. It’s a tight pack and the addition of a new alpha is always disruptive.
It’s the omegas who make the first move. Kaminari breaks the ice, asking him to heatshare. It’s more friendly than fucky, but Shinsou is happy to help. Then Todoroki starts asking to be scented before bed because Shinsou’s scent “helps him sleep better” and Shinsou has never been so flattered in his life. Todoroki always heatshares with Sero, but, luckily, Sero’s the sort of laid-back alpha who thinks it’s cute for Todoroki to nuzzle his pretty face into someone else’s neck.
Once his scent’s around a bit more, things loosen up. Midoriya and Iida seem to share the role of pack alpha, which is weird, but Shinsou’s fine with that as long as they’re not at each other’s throats. It’s not like he wants the spot. Seems like nothing but a headache dealing with the squabbles and gripes.
Some alphas need public status, but Shinsou’s not one of them. Yes, he has needs, but they’re the sort of thing that a willing omega with wet holes can handle.
The thing is, Shinsou isn’t nice. He can play nice if he needs to, and he will for a sweetheart like Kaminari, but nothing satisfies his alpha like making someone beg and whine. Tears are good too. Maybe he has a chip on his shoulder from clawing his way in from general studies. Maybe he’s just an ass. Whatever the reason, Shinsou’s not very egalitarian when his dick’s out.
It seems like omegas can smell it on him, the bitter edge of mean, and those who don’t like it keep a little distance. Most do, actually, and that’s fine.
Bakugou ignores him, and that’s fine, too. Yes, he’s the most perfect specimen of omega Shinsou’s ever seen, and, yes, he’s a brat who would look good hanging off a knot, but Bakugou’s a pain in the ass who offers his heats up like some sort of alpha-of-the-year award. Shinsou’s not into beauty pageants, so they don’t have a lot to talk about.
That’s why he’s so surprised when Bakugou stands in front of him in the lounge, smelling like sex and summer sunshine, and says, “You’ll do.”
Shinsou allows himself a selfish, deep breath before saying, “I’m sorry, what?”
Bakugou looks up at him critically. “My heat’s coming up. You’ve got a knot, right? I’m offering you the best lay of your pathetic life.”
God, he’s a brat, but who can blame Bakugou when he looks like that? Bakugou’s hips are so narrow he’d squeeze the life out of a knot. Shinsou’s obviously going to accept, but he makes a show of looking Bakugou over.
“You gonna waste my time pretending to think about it?”
Shinsou smiles so big his fangs dig into his lower lip. “You know I’m not gonna be sweet, right?”
Bakugou shrugs, already walking away. “You think I can’t handle you? Get over yourself. It’ll probably hit Friday. Stop jerking off until then. I like a big knot.”
Fuck. Shinsou doesn’t like to be told what to do, but damn if he doesn’t want to give Bakugou the biggest knot of his life.
Two days later, Bakugou taps Shinsou in the hallway right before calculus.
“Hey Mind Fuck, heat’s starting. Tell Ectoplasm you’re out and meet me in my room.”
Shinsou grabs Bakugou by the arm before he can walk away. “Oh hello, Bakugou.”
He angles the omega against the wall so other students can get past in the hallway. Shinsou leans into Bakugou’s neck to take a slow, deep breath. He smells incredible, like baking bread, if bread were sex. And he’s almost done. Almost.
“Huh,” Shinsou says blandly, turning Bakugou’s jaw with his whole hand to expose his scent gland to cool air. “I don’t think you’re quite there yet. And I’d hate to miss class for nothing.”
The look Bakugou gives him is pure confusion. He’s used to getting his way, but Shinsou will be setting the pace, thanks so much for playing. Just as Bakugou is working himself up to rage, Shinsou worms a hand into Bakugou’s pants, right there in the hallway, hooks the damp briefs from his skin, and strokes a single finger through his wet pussy.
Bakugou makes a startled sound and grabs onto Shinsou’s forearm. His eyes go glassy as Shinsou eases the finger up, teasing past his clit on the way out. The flush on his cheeks darkens to rose.
Shinsou brings the hand to his face and the smell of Bakugou’s need has his fangs aching. He wants to taste, but he might not be able to walk away after that.
“Not quite heat yet, don’t you think?” He presses his finger between Bakugou’s lips and he sucks like the good boy Shinsou never thought he was. Who wouldn’t like that taste? “I think you have some time.”
Bakugou gives him these big doe eyes that are clearly a lure. Why risk it? Come fuck me now. His tongue laves slowly over Shinsou’s fingertip. He knows exactly what he’s doing, but it only makes Shinsou want to see what Bakugou does when he’s well past horny and on to desperate.
“Listen to me, omega. You’re gonna go to your room, since you smell too good to sit in class without getting bent over a desk. You’re gonna clean yourself up. Everywhere.” Shinsou rumbles at him with the hint of a command. “You got it? I want you sparkling.”
Bakugou frowns and nods the slightest bit, lips still pressed plush around Shinsou’s finger.
“Then you wait. I’ll come when class is over,” he says, dragging his finger out and smearing spit down Bakugou’s chin. “And you’ll be ready then.”
Shinsou steps back, and Bakugou sharpens when he’s not being touched. His eyes narrow as he wipes his chin. “I’m ready now.”
Of course he is. Bakugou wants to stay in control—to stay ahead of those hormones that are making his skin glow like a cover girl.
Shinsou wants him mewling like a slut.
They’ll get there, but for now, Bakugou tosses his head. “I could go get Deku right now, you know.”
He definitely could. Midoriya would follow Bakugou back to his room like an eager puppy with an eager knot, but there’s got to be a reason Bakugou didn’t ask Midoriya this time. Or Iida. Or Sato. Or any of the other alphas who would happily pay for the privilege with their dignity.
So Shinsou shrugs. “Go ahead.” He turns away from Bakugou, slouched against the lockers.
“I know you want me,” Bakugou calls.
“I’ll live.” Shinsou is almost at the classroom door.
“Don’t fucking be late!”
Shinsou hums and waves over his shoulder.
He’s not late. And the sight of Bakugou, lying naked in a mess of sheets, is worth every painful, tedious, endless moment willing his erection down in class.
Bakugou’s skin is flushed like he spent a day in the sun, heated blood radiating the spicy summer scent of him. The hair at his temples is damp with sweat. He’s really in it now, although you’d never know it from his mouth.
“Get your dick out, asshole,” he says while Shinsou is locking the door behind him. “Nearly a fucking hour… you better make this worth my time.”
Shinsou unbuttons his shirt, slowly. “Now, is that any way to ask? Where are your manners?”
“Where is your dick?”
“You’re such a fucking brat,” Shinsou says. He doesn’t say how much he loves that, but Bakugou might be able to smell it on him. Something about a snotty attitude makes arousal creep up his brainstem like a drug. It calls to him like a need his alpha knows exactly how to handle.
Kaminari might play it up for him, as a treat, but Bakugou is the real deal. He probably asked for Shinsou’s knot to punish Midoriya or something, but Shinsou doesn’t give a fuck. He’s going to take full advantage of this opportunity.
He approaches the bed, dropping clothes as he goes. Bakugou smirks like he’s won and lies back, parting his knees and arching his back with a very appealing stretch. He looks amazingly touchable for someone who is ninety percent prickles, but Shinsou is most interested in what’s between his legs.
“God, your holes are pretty.”
Bakugou’s mouth curves with pleasure. “Come have a taste.”
That's the plan. Shinsou kneels between his thighs and muscles them wide for a better view. It's a big stretch but Bakugou goes compliant when Shinsou makes an appreciative sound, because even the prettiest omega in Japan isn't immune to flattery.
“I want ‘em both,” Shinsou murmurs, lapping over soft flesh. The taste of Bakugou is top shelf. The sort of sex you dream about. Shinsou gives one hard suck to his clit before licking lower, lower, lower until Bakugou whimpers and tilts his hips up to make his ass more accessible. His slick is everywhere and Shinsou doesn’t mind getting messy if he also gets to mess up Bakugou.
“Too bad you only got that one knot, alpha.”
“Hard choice,” Shinsou says. He thrusts his middle finger into Bakugou’s pussy, coating it with slick, and then pulls it out and pushes it into his ass.
Bakugou’s eyes get big and then his pupils catch up, dilating at the roughness of it. He can’t even help it. Shinsou lets himself smile as Bakugou turns his head with a curse.
“Mmm. Too tight, probably. I doubt you can take much here.”
“I can take anything you can serve up, Mind Fuck,” Bakugou snaps.
“Oh,” Shinsou says mildly. “Well, that’s just great, if you’re sure.” He fucks his middle finger into Bakugou’s ass a few times, letting his index finger slip into his dripping pussy. Without warning, he shifts it down and shoves both fingers into Bakugou’s ass.
The sound he makes lights up synapses all through Shinsou’s nervous system—part pain, part pleasure. Frustration stirred into arousal and it’s gorgeous.
“Holy shit, you sound so good, bunny. You’re desperate for it.”
Bakugou hisses and turns back to him, kicking him with a delicate little foot. “Yeah, cuz you won’t stop fucking around and do it.”
“Hey,” Shinsou coos, reaching up with his clean hand to wipe drool from those pretty lips. “I know you need it bad, kitten, but don’t forget.” He wraps the hand around Bakugou’s neck and squeezes, leaning over him to get into his range of vision. “I’m the alpha here and I’ll give you what I want, when I want. Got it?”
God, Bakugou looks so good underneath him that Shinsou's leaking enough venom for a mating bite. It drips from the point of his right fang straight into Bakugou’s gasping mouth and he nearly knots the air right then, just at the feeling of Bakugou’s throat bobbing against his palm as he swallows it.
Fuck. He wants to see Bakugou drunk on him. Shinsou falls forward to seize Bakugou’s mouth, to force it open and make him take Shinsou's tongue and venom alike.
One whiny little whimper and he shoves his cock in too, hips knocking Bakugou’s thighs wide. Bakugou’s pussy is wet and warm and begging for him. It’s the best pussy he’s ever had, not that he's gonna admit it, but there’s something Shinsou wants even more.
He fucks Bakugou in long strokes until they’re both on the edge and then Shinsou pulls out, grabs his slick cock, and starts feeding it into Bakugou’s ass.
“Oh my god,” Bakugou gasps, eyes snapping open. “What—oh my god.”
“How’s that feel, baby?” Shinsou asks. He gathers more slick from Bakugou’s pussy to get himself wet. Bakugou’s mouth is wide open, and he makes a choking sound when Shinsou thrusts all the way in.
“What a good omega,” he sighs, and Bakugou can’t stop his pussy from gushing at the praise. “Letting me use your naughty hole.” Shinsou leans close, like he’s whispering a secret in Bakugou’s ear. “I know it’s dirty, but it feels really good.” He rolls his hips. “So tight. Have you let anyone fuck you here before?”
Bakugou whimpers and shakes his head. “No, alpha.”
Ahh fuck, that makes Shinsou hard. Bakugou must be dropping deep to call him alpha.
“Good boy. We’ll break it in today, then.”
Bakugou groans and Shinsou goes to work, easing Bakugou up from smooth, slow thrusts to something that makes his legs bounce in the air.
The sounds he makes are insane, like he’s drowning in arousal and Shinsou leans back just to watch that little hole stretch out around him. Fuck, he loves ass. He loves the way his cock carves space where it shouldn’t be, the surprise and submission it forces on omegas, the way it leaves their pussies open and empty and wanting.
His cock begins to swell as he watches Bakugou’s tight rim blush red from friction, and it only gets better from there as Shinsou’s thickening knot stretches him wider, slipping in and out with each thrust. He’s going to finish way too fast, but Bakugou smells like sex and looks like a model and moans like a high-end whore earning his pay.
“Shinsou,” Bakugou gasps, hands grabbing at his arms uncertainly. “A-alpha.”
Maybe he’s trying to protest, but before he can get another sound out, Shinsou’s got his whole knot inside, too big to come out again, and Bakugou’s words cut off as his rim tries desperately to clench around it.
It’s fucking gorgeous. Bakugou’s perfect little ass is so dainty it can’t even take all of him. He bulges over Shinsou’s knot, muscles working to try and close around the base of his cock but not able to get there—just left stretched open and spasming.
“Oh, baby,” Shinsou groans. “Fuck.” He looks up at Bakugou, who’s making these little choking sounds.
“Oh my god.” Bakugou’s voice is shattered, eyes wide with shock. His hand slides down past his pussy, fingers splitting into a vee to brush against the knot of Shinsou’s cock. The part he can’t fit into his body.
“Oh my god. You—” he swallows and knocks his head back. “You knotted… my ass?”
“Fuck, yeah I did, and it’s the best thing I’ve ever seen in my whole life.” Shinsou brings his hand to meet Bakugou’s, petting along his quivering rim. “I wish you could see it. Want me to take a picture?”
“It doesn’t… fit,” Bakugou gasps out. His body is still trying to lock around it—only it’s not in his pussy where it should be, so he’s flooded with conflicting hormones. There’s pleasure, yes, but it’s offset by an alarming lack of alpha cum where he needs it. His eyes go glassy as he twitches.
“That’s what makes it so good, baby. You want me to push it in?”
Bakugou makes an uncertain sound so Shinsou wraps two hands around his waist and pulls Bakugou’s body further onto his cock. It takes some strength because Bakugou’s really too small to fit the whole thing, but he gets in just far enough that Bakugou’s rim can tighten around the base of his knot.
Bakugou is practically speaking in tongues as he writhes under Shinsou. “Too deep,” he gasps, and Shinsou releases him, letting Bakugou’s body slowly push him back out. Unfortunately, that forces his rim to stretch wide around the knot again, and Bakugou keens, covering his face.
“Sorry baby,” Shinsou says, easing Bakugou’s legs onto his shoulders. “You either get it here,” he presses fingertips under Bakugou’s navel, “Or you get it here,” he strokes a finger along Bakugou’s straining rim.
“But at least I can play with your pretty little pussy.” Shinsou leans back again to get a view of where they’re connected and Bakugou scrambles to follow his motion so the knot doesn’t tug at him. “Does that help, sweetheart?”
Bakugou is too busy panting to answer.
“God, you’re gorgeous everywhere,” Shinsou says, parting Bakugou’s slick-shiny labia. He rubs a thumb in a circle over his clit to make him moan and clench. “See? You keep tightening up like that and you’ll drain my knot in no time.” He slides two fingers effortlessly into Bakugou’s pussy and pushes downward against the bulge of his knot.
Cum begins flooding out of him in pulses so hard they throb up through Shinsou’s core. Bakugou feels it too. He gasps and jerks his hand to press flat on his tummy. “Feels weird,” he whispers brokenly.
“I know you want it in your pussy,” Shinsou soothes, “but I’m filling your ass first. We’ll get there, I promise.”
Bakugou whimpers and Shinsou drags his fingers out to tease and pinch at his labia. Bakugou hasn’t cum yet, but he’s oversensitive from the instinctive reactions triggered by the knot. It’s crazy how mixed up omegas can get if you put it in their ass, like somehow it triggers post-knotting haziness while ramping up their desperation.
It’s really the best, and there’s nobody Shinsou would rather see all gorgeous, wet, and fucked-up than Bakugou. The sweet thing seems to be actually clenching purposefully, trying to milk him.
“Here, sweetheart,” Shinsou says. “If you really want me to finish with your ass, I’ve got a trick.” He uses the fingers of one hand to spread Bakugou’s labia wide, and brings the other hand down hard, slapping right over his exposed clit.
Shinsou’s never heard a sound so sexy in his life. Bakugou clenches hard enough that he nearly squeezes the knot right out of his ass and Shinsou has to pitch forward to keep it tight. Two more slaps and Bakugou cums, shaking like Kami hit him at full voltage. He drains the knot like he’s squeezing an orange and Shinsou’s cock slips out while Bakugou is still writhing.
“Fuck, look at you,” Shinsou moans as he gets a good look at Bakugou’s ass, now empty and showing the wear. “Pussy just doesn’t gape like this. Ever.” He strokes over the lax hole and cum oozes back out, thick and white over Bakugou’s puffy red rim. There’s zero resistance when Shinsou slides his fingers into weakly twitching flesh.
“You did so good,” Shinsou says, shifting down to suck lightly at Bakugou’s pink, perfect pussy. He spasms, oversensitive, and his rim clings to Shinsou’s knuckles.
“Please, Shinsou.” Bakugou’s voice is jagged like broken glass.
“Of course, baby.” Shinsou pulls back with one last kiss and a toothy little nip to those fat lips. “Let me clean up and I’ll give you the knot you want.”
Bakugou whimpers as Shinsou stands up, then thrusts a hand down to the mess oozing out between his cheeks. Shinsou clenches his jaw against arousal as Bakugou drags his fingers through the cum and shoves them squelching into his pussy. Desperation looks so good on him—usually such a cocky thing, so sure of his pretty face and tight hole.
But maybe it’s deserved, because even fucked up and fucked out, he’s wet-dream-worthy. It’s hard to turn away from all that need, but Shinsou cleans himself up in Bakugou’s tidy bathroom and leans against the doorframe to watch as Bakugou fingers more cum into himself. He looks up as he sucks his fingers clean and furrows his brow.
“Shinsou,” he whines. And then, “Alpha,” when Shinsou doesn’t move.
“Aww, but it’s such a good show,” Shinsou says, tugging at his dick. His balls are getting heavy again at the sight of Bakugou acting like such a slut for his cum. He deserves to be filled. “Gimme some more, baby. I gotta get hard again.”
Bakugou groans as he glances down at Shinsou’s dick, which isn’t anywhere near giving him what he wants. He shoves his fingers back into his ass and then into his mouth, but it isn’t for Shinsou’s benefit. He’s not putting on a show, he just needs it that bad, heat hormones demanding the alpha pheromones that Shinsou unhelpfully shot into his ass.
“That’s good, pretty omega. Now show me where you want me to put my knot.”
Bakugou whimpers around the fingers between his lips and spreads his pussy, angling to give Shinsou a better view. His slit is small, pink, and shining with slick. It’s pretty and untouched, right above his wrecked asshole that’s still leaking Shinsou’s cum everywhere.
Yeah, that does it for him. Shinsou’s cock gets heavier between his legs. He steps closer and looks down at Bakugou, delicate, wet, and panting. His eyes are dilated black with need and his scent is thick enough to put a haze in the air.
Shinsou’s more clear-headed since he got that first knot out of the way, but that scent is drowning his control.
He puts a hand on Bakugou’s flat tummy and pushes down, forcing a fresh wave of creamy cum to spill out of his ass. The first knot is usually the most potent, which makes it especially cruel to waste it in his ass. Shinsou dips two fingers into his own spend and paints it over Bakugou’s scent gland, rubbing in gentle circles until Bakugou tilts his head and purrs like a kitten. He paints more over Bakugou’s nipples, his clit, and finally, his tongue, after coaxing his mouth open with a tap on the chin.
Pacified by the attention, Bakugou lolls it out and wait while Shinsou indulgently strokes cum to cover it.
“How’s that?” he asks after Bakugou closes his mouth and swallows, looking up at Shinsou with fuck me eyes.
“Good,” he whispers.
Shinsou trails his fingers down over all the warm, sculpted muscles of Bakugou’s torso. “And how’s this?” he asks, tucking two fingers into Bakugou’s slick pussy.
Bakugou’s eyes dip closed as Shinsou digs his knuckles into soft flesh. “Empty,” he says, like he’s holding back tears.
“Let’s fix you up then.” Shinsou climbs onto Bakugou’s bed and kneels between his thighs, balls aching to fill him again now that so much of his cum has already leaked out onto the bed. Shinsou nudges Bakugou’s ass up for one last look and uses a thumb to press some of his cum back inside.
It’s hard to resist playing where he’s already left his mark. He slips his other thumb in and spreads wide, blood coursing to his cock at the loose aftermath of his knot. Bakugou squirms, but Shinsou just tightens the grip of his hands on Bakugou’s ass, pulling harder at his rim.
“Nngh. Please. Alpha.” Bakugou strokes his pussy with parted fingers to redirect Shinsou’s attention.
“Wait,” Shinsou says firmly.
“Need it. Please, Shinsou.” Bakugou spreads his pussy wide again, having already figured out what Shinsou likes.
“What a good knotslut you are,” Shinsou says affectionately. He hoists Bakugou’s hips off the bed by the grip on his ass, thumbs still deep inside and stretching.
Bakugou’s eyes roll at the sensation and he lifts both feet to Shinsou’s shoulders to keep himself balanced. Even his feet are pretty and Shinsou ducks his head down to lick along the arch of his instep.
Bakugou’s nose wrinkles, but he just pushes with his toes to help lift himself closer to Shinsou’s cock. “Please,” he moans, shimmying his shoulders down on the sheets until Shinsou nudges against his labia. “Please, alpha.”
“You sure?” Shinsou asks, because the heat has hit fully now and he kinda thinks he might like to see Bakugou cry.
But Bakugou’s apparently a hard worker rather than a crier. He just looks at Shinsou with big bunny eyes like Shinsou has never seen before and begs like it’s poetry. “Please, I need your cock. I’ll die. I’ll do anything.”
“I know you will,” Shinsou says, and he glides inside Bakugou with one, smooth thrust. Perfectly wet, perfectly tight, and now perfectly obedient too. Bakugou groans in satisfaction and that’s perfect too.
“That good, baby?” Shinsou teases as Bakugou’s mouth falls open. “You like it?”
Bakugou nods like it’s a serious question. Of course he likes it. It’s dick and he’s in heat.
It's still nice to hear it though, and Shinsou finally relinquishes Bakugou’s ass to hold him by the waist and pound into him harder. Might be nice to leave the inside of his thighs bruised.
“You take it so well,” Shinsou flatters, and Bakugou eats it up. “Next time I’ll bring a friend and we’ll see if you can take us both.”
The idea knocks Bakugou back into his head. “What?”
“Yeah. Just think of how full you’ll be with two knots plugging you up tight. All that cum forced up inside you. We’ll get it deeper than ever.”
Bakugou puts a hand on his stomach like he’s imagining it. “Can you… really… do that?”
Shinsou’s seen the porn, but he’s never had the pleasure himself. He puts his hand on top of Bakugou’s and presses it down until the pressure hugs his cock with each thrust.
“If anyone can, it’s you, baby. You’re the most perfect omega I’ve ever seen.” It’s true, but it’s also exactly the sort of thing that goes right to Bakugou’s head. Maybe he can’t take a full knot in his ass, but that’s fine. It's better. Shinsou absolutely prefers the way Bakugou is left straining and stretched.
His knot pulses again at the memory of Bakugou’s ass squeezing around him and Shinsou slows down his thrusts so he can watch Bakugou’s pussy do the same thing—throbbing each time his knot bullies its way in.
Bakugou is tight. He probably trains to be the best fuck, like he does with everything else. He wraps around Shinsou’s knot like he wants it fucking him on the inside, but Shinsou tugs it out anyway.
“If you want it, you gotta lock me in,” he teases when Bakugou looks up at him, betrayed.
He’s almost fully popped and Bakugou grimaces at the stretch when the knot shoves in again. But he gets his payback. Bakugou clenches around him so hard that the pleasure sharpens into pain. Shinsou topples forward, cursing as the first wave of cum is forced out of him ahead of his orgasm.
“Holy f-fucking sh—it.” Then the climax catches up like a punch to the back of the head. Usually his second knot is smaller, but there’s so much cum spraying out of him that his balls are spasming. For the first time in Bakugou’s heat, Shinsou loses control, and he ruts hard into the soft body below him, trying to force his cock, his cum, his knot so deep into Bakugou’s body that he’ll be shaped like Shinsou forever.
“So good,” Shinsou gasps. “Take it all, every fucking inch.”
He’s finally giving Bakugou exactly what he wants and the omega cums with him, pussy fluttering like a pro, mouth stuttering out broken syllables, half alpha, Half Shinsou, like he wants to be good.
And he is good. His scent and his holes and pretty, empty eyes. Shinsou grinds up into his g-spot because Bakugou deserves to cum so hard he blacks out.
“Everything,” Bakugou gasps. “Give me everything.”
God, don’t tempt him. Venom oozes down Shinsou’s fangs, making his gums ache to bite. It would feel amazing, but he’s so amped up right now he’d leave Bakugou drunk on it for at least a day and Shinsou isn’t about to play doting alpha all weekend. Not when he’s just a random knot fill-in. Instead, he lets Bakugou bring their mouths together and lick the venom off his teeth, moaning and quivering underneath him until his body is as pliable as clay.
He sucks on Shinsou’s tongue like he likes the taste, and that’s an appealing thought. If Bakugou were actually willing to try taking two knots, a bite would probably get him most of the way there. Tearing isn’t sexy after all, but Shinsou’s venom would make Bakugou open like a flower.
He’d gladly spend all weekend taking care of Bakugou like a bitch after that, but there’s no way he’ll get the chance.
Bakugou has gone still beneath and Shinsou realizes he passed out. Too much cum and venom all at once. It’s sweet, really, to see Bakugou finally relaxed and content. His mouth hangs lax and Shinsou traces a finger along his pillowy lower lip. Bakugou turns instinctively to suck on the tip and Shinsou’s cock twitches inside him.
It would be nice to do this again sometime. Even unconscious, Bakugou’s the omega archetype. Perfect scent, perfect instincts, perfect mouth, perfect pussy. Shinsou won’t ever blame Bakugou for being arrogant about it. He should be.
It just also happens that Shinsou’s the type of alpha who wants to turn an omega into a breeding bitch and if that means dragging them off a pedestal, even better.
He rolls them so he can relax without crushing Bakugou, careful not to tug too hard at his knot, which is still hugged deep in Bakugou’s body. There’s a blanket at the foot of the bed, and Shinsou manages to drag it over them. It smells like Bakugou, but a version Shinsou doesn't know. Not the way he smells in class or in the dorm or when he’s in heat. It’s gentler, and Shinsou’s eyes droop as it wraps around them.
The first wave ebbs and pleasant relaxation sets in. Shinsou isn't always comfortable with the aftercare portions of heat, but that scent eases him into half-consciousness. Bakugou is cuddly while knotted. He worms his face into Shinsou’s neck and sucks on his skin, still dozing, making soft mmm sounds that are more flattering than they should be. He probably does this with every alpha like a greedy, entitled omega.
If Bakugou’s going to indulge, then Shinsou will too. He rubs his hands down the silky skin of Bakugou’s back, and kneads his ass, rocking him on the knot just enough that it feels good.
Bakugou purrs at the attention so Shinsou slides his fingers down further to toy with Bakugou’s rim while it’s still wet and stretched. He gets a gasp for that, then a mewl as Bakugou comes back to himself and turns his head up.
“Hurts, Shinsou,” he murmurs, looking so dazed that Shinsou gives in immediately, patting him softly on the ass. It doesn’t hurt that Bakugou called him by name, either. Alpha is hot and all, but Shinsou likes hearing that Bakugou knows exactly who’s in his bed.
“Sorry, baby.” Shinsou kisses his nose. “You did so good, though.”
Bakugou goes back to soft and kittenish. “Yeah?” He licks Shinsou’s mouth, and it’s so cute it must be an affectation. But then again, what else could Bakugou want from him when he’s still milking Shinsou’s knot?
“You liked it?” Bakugou asks.
“I still like it,” Shinsou teases, tucking his hips up to press his knot in.
“Thought you would,” Bakugou says, satisfied.
Something about that doesn’t sit comfortably with Shinsou—a thorn catching at his ego. “What was that?” he asks.
“Can smell you,” Bakugou murmurs into his chest. “Knew you wanted to knot me.”
Shinsou bristles, calm aura popping like a bubble. “You’re an omega. I’m an alpha. You thought I, specifically, would be grateful or something?”
Bakugou looks up at his sharp tone. His eyes are wide and Shinsou shouldn’t be harsh with him while he's heat-vulnerable, but the implication pisses him off.
“I’m not desperate, Bakugou. For you or any other wet hole.” Bakugou flinches and Shinsou feels it around his cock, but he keeps going, lip curling into a sneer. “You think you’re so fucking perfect, don’t you?”
“No,” Bakugou says, "I—" he cuts off with a short, quivery breath. “I thought you… liked me.”
“What?”
Shinsou's response is surprise, more than anything, but Bakugou's mouth drops open, his nose wrinkles, and then he dissolves, turning his head as his eyes flood with tears. Angling his body off of Shinsou as much as possible, he buries his face in his arms.
“You n-never smell disappointed,” he cries into the sheets. “Most alphas… are disappointed… with me.”
Shinsou must be misunderstanding, but his anger is quickly turning into alarm at the sight of Bakugou sobbing on his knot. A knotted omega should be calm and cum-drunk. They should feel safe. That's the whole reason he's here, and Shinsou has enough alpha pride to feel shitty about this. He gently rolls them, tucking Bakugou underneath him and trying to see his face.
"Hey, hey," he says softly, but Bakugou turns his head away so Shinsou holds him tight and scents him, rubbing their cheeks together until he stops shaking. “Who is disappointed with you?” he asks into Bakugou’s ear.
“Alphas,” Bakugou says in a tired voice.
“Why?” As far as Shinsou can tell, Bakugou is the perfect omega specimen. It’s almost annoying.
“‘Cause I’m rude. Bitchy. Alphas don’t like that.” He sniffs. “I can smell it. They want me, yeah, and they want me to be different, too. What a shame that my personality isn’t as sweet as the rest of me.”
He says it like he’s repeating it rote, and Shinsou can imagine Iida saying it exactly like that. Even Midoriya, in nicer words, probably.
“I thought maybe…you...” he trails off with a hiccup and the urge to comfort him is so strong Shinsou feels sick with it, like a hook in his gut. He read this whole thing very wrong. Fuck, he's an idiot.
“You’re right,” he says, pressing his body over Bakugou and finding his scent gland. Shinsou lavishes attention on it, licking and scraping his teeth over Bakugou’s skin like an act of devotion. “You’re right, I like you and I’m not disappointed.”
Bakugou shudders beneath him. “Yeah?”
“Yeah, baby. I like you bitchy.” His scent is smeared everywhere now, and Shinsou laps it up in long strokes. “I like your whole thing. I think you’re…” he shies away from the word perfect. “A very, very, very good omega.” His knot has gone down and there’s give inside Bakugou for him to thrust, just a bit. So he does, real nice and slow.
Bakugou moans for it and his scent sweetens back to sun-ripened. It’s good enough to keep Shinsou hard. He sits back and eases his knot out of Bakugou’s body so that he can fuck for real.
“I'm an ass, but I'll make it up to you." He kisses Bakugou's chest and pulls back. "You want me again, Kat? I'll be sweet for you.”
Bakugou nods. He’s so pretty sex-mussed and red-faced. It’s not the sort of crying that Shinsou usually likes, but it works anyway. They’re riding the emotional whiplash now, hormones synchronizing again, scents combining perfectly, both driven by the need to please.
“Want me to fuck all that cum even deeper?”
“Yes,” Bakugou hisses, reaching down to play with his clit.
“Which hole?” Shinsou asks, rubbing his cock over both, gorgeous and dripping.
“Oh fuck.” Bakugou bites his lip. “Either,” he gasps, like he’s not really sure.
Shinsou groans. “What a good fucking boy you are, but what can I do for you, baby? What do you want?”
Heat haze is already creeping back into Bakugou's eyes. He tilts his head. “Will you bite me?”
Venom oozes into Shinsou’s mouth as he leans down and licks an appealing spot on Bakugou’s shoulder. “Absolutely.”