this was a birthday fic for the sweetest dearest @agaric_shroom !!!!!

c/w: dkbk, choking, light dom/sub, piss kink (could be read as under-negotiated kink!)

(Available on AO3 here!)

https://archiveofourown.org/works/30549864 

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Izuku's hands are large. Even when he was a tiny little something still growing into OFA, Katsuki always noticed them. They were large, scarred, and always so gentle and kind to those that he cared for.

Katsuki sometimes marvels at how /gentle/ those hands can be towards him.

Now that they were older, Katsuki liked to hold them. Touch them and feel how the knuckles jut out of the scarred skin, or feel along the lines of his palm with the hopes that he one day memorizes the pattern they make.

And despite his prior-tendency for broken bones (thus fucking up his veins and bloodflow), Izuku's hands were /always/ warm.

Katsuki liked them best when they were on his body. Touching him all over from top to bottom to leave paths of pleasure in their wake—

as if he was gently being set alight.

But Katsuki /loved/ them when they were around his neck.

"Kacchan—" Izuku gasps, desperate against the tender skin of Katsuki's jugular. "Kacchan, /Kacchan/— you feel so good inside."

His cock is spreading Katsuki open wide, and his hole flutters around the girth of it as he tries to greedily suck in more. On his back like this, Katsuki couldn't even hope to get a good view of it,

but he can /feel/ how tightly he subconsciously grips onto his cock— desperate for more.

Izuku pulls out a few inches, and Katsuki whines at the loss of it. "No— Fuck me, /Deku/—!"

"I've got you," Izuku promises, thumb tracing over the swell of Katsuki's throat as he sits up. He leaves the touch there for a moment as Katsuki's breath hitches.

Their room is lowly lit— and Izuku is only lightly covered in the pink-red ombre of the 'mood-lighting' he'd installed just for moments like this.

Still, Katsuki marvels at the picture he paints with his lips half parted as he pants and half-smiles down at him.

Katsuki counts his freckles, traces down the side of his jaw, and dips his eyes lower and lower until he focuses on the hickey on Izuku's neck that he'd sucked there earlier. It was purpling nicely— almost black. Katsuki wanted /everyone/ to see,

to know that he was the fucking one who put it there.

And he wanted Izuku to tighten that hold on his neck, and leave marks there too. Ones shaped just like his thick,

scarred fingers so that those nobody extras wouldn't have a choice but to recognize that Katsuki was Deku's, too. /Fuck/.

"Look at me," Izuku says, voice soft like candle smoke. Katsuki's eyes blink open before he realizes he even closed them.

"Keeping looking at me just like that, Kacchan."

Katsuki isn't sure what expression it is he has on his face that Izuku wants him to keep, but he looks back up to Izuku's eyes anyway. His own open wide, mouth open wider.

With his other hand, Izuku traces the curves of Katsuki's lip. His fingers come back wet, covered in drool that has spilled over as Katsuki gasps and moans while being fucked.

Then he brings that hand down to Katsuki's neck, too. His fingers slide smooth across Katsuki's sweaty skin, smearing his own spit across the nape of his neck. Izuku doesn't even squeeze just yet, only threatens (/promises/) with their mere presence.

Katsuki wheezes anyway, and circles his legs around Izuku's waist to tug him in deeper.

Their hips meet again, fully groin to groin. When Izuku grinds down, to make sure Katsuki feels every thick fucking inch of his cock, Katsuki's own length gets caught between their bellies.

Izuku feels the way he shudders at the burst of pleasure.

Katsuki tightens down on him as he jerks his hips up to fuck against the planes of Izuku's abs (and subsequently sink back down on the length of his cock with each downward thrust),

and it makes Izuku toss his head back to moan at the ceiling.

Katsuki can see perfectly how the muscles in his neck strain as he tries not to be too loud, tries to stay in control and not fuck Katsuki within an inch of his life before they're ready. His jaw tenses, even,

and Katsuki wants to bite and lick and suck on the wide jut of it. Fuck, Deku was so pretty.

Katsuki tugs him back down with a desperate sound and two hands to his shoulders. They grip tight for a moment, trying to convey just how urgently Katsuki needs him /now/,

likely leaving red Kacchan-shaped fingerprints in his skin. Good.

And then he relaxes, as Izuku slowly tugs a few inches out to watch how Katsuki's ass clings to the length of it. Trying to urge him back in again.

Katsuki's hands drift lower, from the shoulder to the bicep until his fingers inevitably get caught in the curve of Izuku's elbows. His eyes squeeze shut again as Izuku thrusts back in.

"Look at me, baby."

"/Fuck/," Katsuki grunts. He opens his eyes again, just in time for Izuku to tighten the grip he has on his neck. The pressure asserts itself on the sides, near his carotid artery, and immediately his head swims.

He can still breathe, though, and moans encouragingly when Izuku laves kisses along his brow. Katsuki's head feels stuffed full as Izuku maintains that hold, sapping him of his strength even as he moans encouragingly in his ear.

It feels so good that Katsuki's hips jump to keep fucking back against him until he loses his rhythm.

His legs drop open, flat against the bedspread, and Izuku shifts his weight from knee to knee to find a better angle. Katsuki's fingers tighten on his bicep,

keeping him from moving too far away.

Izuku /laughs/, low and breathy, and it feels like it vibrates right across Katsuki's nerve-endings.

He takes one hand away— shushing Katsuki when he hisses out in disapproval—

and hooks his fingers beneath one of Katsuki's knees to shove him up and open again.

The shift in position makes Katsuki even more breathless. His body curves, fingers getting caught where they cling to Izuku's arms

as Izuku lays his own thighs overtop them. Izuku's grip on his neck tightens further, finally cutting off the airflow.

And then he begins to thrust in again. Their hips slap together noisily at first like a rhythmic ringing in Katsuki's ear,

and then there's only the sound of lube squelching out of his ass as Izuku displaces it with his own cock and his precum.

Katsuki quickly gets lost in the rush of his own blood in his veins over that, though. His eyes roll back as his chest jumps with the need to breathe.

Izuku's hands are so fucking large that he can nearly wrap all the way around Katsuki's lithe neck with just one palm.

And his fingers are /strong/. He can feel how Izuku's grip tightens almost unbearably so before he catches himself and loosens them again.

Like that, Katsuki is able to breathe in just a few gasping wisps of air before he loses them again.

The drifting haze in his mind soon overcomes the pleasure rocking through him between his legs. His thighs spasm as he clamps down on Izuku,

purely reactionary as he passes over his prostate and rocks against it purposefully.

"/There/ we go. Keep taking my cock just like that, Kacchan." Izuku presses down harder on Katsuki's thighs until they /ache/,

testing the limits of his flexibility. "You're gonna cum for me just like this, okay?"

Katsuki can't even argue or plead ("Yes, yes /please/"!) like he wants to, and his body curves upward one last time in a desperate attempt to get air in his lungs again.

And then Izuku lets go. His hips don't stop moving, still rocking into Katsuki's own and keeping his legs spread open wide so he can't escape the assault of pleasure.

But the hands on his neck loosen and then leave him,

and his vision is blurred with both fading light behind his eyelids, and tears.

"Ohhh, fuck," Katsuki rasps, his entire body rocking with the motion of Izuku fucking him. "M-more, mm—!"

Izuku kisses him quiet as he starts getting desperate for that floaty feeling again.

"Yeah? Want me to choke you until you pass out?" Izuku lays his palm flat against the front of Katsuki's neck and digs the heel of it against his Adam's apple. "See if I can get you to cum at the same time?"

He wraps his hand around the length of Katsuki's dick and squeezes gently. Pre-cum pearls at the tip, weeping clear and spreading across his knuckles.

When he begins to stroke it up and down, ever so slowly, Katsuki feels like he might go insane from the pleasure.

"Don't fuckin' stop— don't stop touching me." Katsuki tangles his fingers in the hair hanging loose at the back of Izuku's neck. When he pulls, Izuku grunts at the bite of pain but only leans down further so Katsuki can grab more. "Don't /stop/."

"Yeah? Like this?"

Izuku trails his free hand across Katsuki's chest. He grabs a handful of his pec and squeezes as if they're tits. When his fingers pinch around his nipples, Katsuki holds his breath as his heart picks up pace.

When Katsuki doesn't respond beyond a stuttering moan, though,

Izuku pulls away.

"Shit— yes, but…" Katsuki breathes a frustrated noise out of his nose. He wriggles his fingers free from beneath his legs and grabs Izuku's wrist to tug it back to his neck. "/Here/."

"Want me to touch you here?"

Izuku's touches are light, too fucking teasingly light. Katsuki knows he's doing it on purpose, but he feels /this/ fucking close to throwing a tantrum to get what he wants.

"Harder!"

Izuku traces along his clavicle, pointing his index finger against the base of Katsuki's throat to feel how it bobs and moves as he swallows thickly.

Then, Izuku glances up at his face. Watches the tears clinging to his lower lashes and how they've left streaks curved towards his hairline from the position they're in. He kisses them away just to taste the salt.

Izuku licks his lips, once,

and then presses them to Katsuki's. They open wide, but Izuku keeps the kiss gentle and sweet like candy in summer.

"Say please."

Katsuki glares, mouth parting in a snarl versus Izuku's innocent, cherub-smile. "Fucking /please/, you shitty Deku. Choke me until I cum like you fucking /promised/."

Izuku hums noncommittally.

Then his hands come back to wrap around Katsuki's neck just like he wanted. Katsuki focuses on the way his wrists flex when they tighten again, until his eyes roll back and he gets lost in the sensation all over again.

Izuku stares at every inch of Katsuki's skin that is bared to him. He looks… small, almost.

It's strange to ever think of Kacchan as small and fragile because his mere presence demands attention as if he's a giant in the middle of the sky.

But now, bundled beneath Izuku's body with soft pleading mixed in with moans spilling from his lips… Izuku wants to cuddle him even closer and hide him away for /his/ eyes only.

Izuku hunches over Katsuki, and quiets him down again with another kiss. Their tongues meet in the middle— one slow and steady and the other frantically take take taking everything Izuku freely gives.

Katsuki seems to feel everything so much /more/ when he's breathless.

Izuku is only lightly rocking his cock in and out of Katsuki's ass, but he reacts with a shocked gasp every time, as if he isn't expecting the stimulation against all those good spots inside of him.

Izuku knows his insides well enough to know where to aim and maximize that pleasure for him.

When he breaks the kiss, Katsuki is /gone/.

His eyelids are fluttering, eyes moving beneath the closed lids as his brain tries to comprehend the overload of pleasure.

He's drooling freely, and he would be so embarrassed to know how /cute/ Izuku finds it.

And his cock is bobbing— tensing and jumping with each pulsating wave that pushes him closer and closer to orgasm— even without Izuku touching it directly.

Katsuki's chest hiccups and draws Izuku's eyes down to his pretty pink nipples. Izuku lets one hand go to feel along Katsuki's ribcage.

Katsuki's face is red with the lack of air, and that red has painted as far down as his chest—

disappearing behind Izuku's hand wrapped firmly around his neck before it comes back as a softer pink across Katsuki's hickey-lined skin.

Izuku suckles another one against the curve of his jaw, between his sideburns and his ear,

and lets go of his hold so that Katsuki can breathe one last time before Izuku fucks him past the point of no return.

Katsuki takes two or three seconds to register that the hand is gone from him, because he stays completely silent the entire time. And then,

as if he's surfacing from deep underwater, a gasp erupts from him as he greedily pulls air to his lungs.

"Ah, Dek—"

Izuku interrupts whatever it is Katsuki is going to say by choking him again. Katsuki's entire body shakes as his arousal overtakes him again, and Izuku feels his own crescendo in response.

He wants to cum so badly in Kacchan,

make him feel it deep in his guts and hold it there until he wakes up again— but he needs to make Kacchan cum first.

Izuku uses the hand choking Katsuki to shove him deeper against the mattress. Like that,

he can hold Katsuki down without having to lose the force behind his hips driving his cock in out, in out, in and fucking out of Katsuki's tight little hole.

"C'mon, Kacchan. Show me how good it feels, cum just from me choking you— oh!"

Katsuki's legs lock at the ankle behind Izuku's ass and, like that, he makes Izuku move /faster/. With a silent wail, Katsuki's insides clamp down on Izuku's cock and begin to quiver and shake as if to milk him dry.

Izuku's own eyes roll back into his head at the burst of feeling, and he grabs Katsuki by his hip to keep him moving them just like /that/, oh shit oh shit—

And then Katsuki tenses, body jumping not with pleasure but something like shock or pain.

Immediately, Izuku pauses and blinks his eyes back open. His fingers slacken, and the noise Katsuki makes is akin to the ones he makes when he gets punched.

"Kacchan?"

Katsuki shakes his head, but his face is /flaming/ red and his palm has shot down to between his legs, clutching at his lower tummy and his cock as if— oh.

"Do you… do you need to—"

"Shut the fuck up!" Katsuki hisses. "Just… give me a minute."

The urge to fucking… piss himself hit all at once and it almost shocks Katsuki into silence. He'd been so close to cumming— and then his bladder made its presence /known/.

Still was, but his cock was so hard that the conflicting feelings made him confused. Made his cock grow /harder/.

Izuku hums as if realizing what was going on in Katsuki's mind. He pulls his lower lip between his teeth to hide his fucking shitty smile and Katsuki glowers at him.

"Don't you fuckin' dare."

Izuku catches one of Katsuki's legs beneath the knee to keep him open.

And then his hips begin to move again.

"W-wait, Deku…"

Izuku's grin turns predatory, almost, and Katsuki gulps as that just makes him fuck in /harder/.

"I thought you didn't want me to stop? Don't you want me to keep fucking you so you can feel good, Kacchan?"

Katsuki writhes, entire belly clenching with the effort of not releasing his bladder all over Izuku, himself, and the bedsheets.

"C-can't…"

"Don't hold it in, Kacchan. You can let it go just for me, okay?" Izuku presses his hands against Katsuki's stomach

and feels how tense he's gotten. "It'll feel so good, I promise."

It feels like just a single drop leaks out, the feeling almost indiscernible from the precum weeping from the tip of his cock. Still, that imaginary, tiny drop makes Katsuki's entire body /shiver/ with the effort

it takes to hold himself back. Fuck, it'll be so messy. He'll soak himself all over, and probably get it on Deku. So fucking dirty.

"You really have to go?"

"/Yes/," Katsuki gasps, desperate.

Katsuki wants to do it so bad, but his head gets jumbled again as Izuku bites down on one side of his neck and squeezes his palm down on the other.

His breathing cuts off as soon as he inhales,

and that brief moment of panic at the lack of air quickly transforms into orgasmic bliss.

Izuku lets go, and Katsuki hits his climax /hard/.

"Fuck!" Katsuki shrieks, voice hoarse and broken. He cums with a silent wail, twisting from side to side as it makes him lose total control of himself.

His cum shoots out between them, covering both of their bellies in white. Izuku feels his balls tense as he tries to hold himself back from cumming until Katsuki's orgasm has finished…

but Katsuki blinks his eyes open and slaps a hand against his wrist— holding onto it for dear life— and Izuku bites his lip as the sight makes him cum harder than he ever has.

It spills deep inside of Katsuki, just like Izuku wanted. Warms him up from the inside out and makes him weakly tremble in Izuku's hold as the feeling lengthens his orgasm by a few moments more.

And then, as soon as his climax has passed and his cock has softened by enough of a margin… he begins to piss all over himself.

It's embarrassing and sudden despite the build-up, and he wheezes a soft, "Noo…" as it all comes out at once.

It floods up his belly, still held up at an angle with Izuku's cock grinding into the last few drops of cum into him.

It's warm and— and it'll dry sticky and gross and Katsuki can feel overwhelmed tears prickle at the edge of his eyelids.

And then they roll back as it feels like he has a /second/ climax from the sheer relief of emptying his bladder all over himself. There's so much…

Izuku watches the stream of it, one hand fisted at the base of Katsuki's dick to keep it from spraying wildly. He holds firmly,

and even strokes as the stream peters out from a spray to a light drizzle.

When it slows further to just a few drops beading and dripping to pool in Katsuki's belly button, Izuku swipes his thumb across it to wipe him clean.

He smears his finger clean against his own hip with a soft, almost incredulous laugh. He keeps it soft and light-hearted as Katsuki basks in the intense afterglow, easing him back into his own brain with a few touches and kisses.

For Katsuki, it feels as if he's completely left his body, unaware of anything beyond Izuku touching him and murmuring soft, gentle words to urge him back down from his high.

His body feels pleasantly heavy, lungs emptied of everything and filled instead with sweet oxygen

and the smell of Deku. Insides empty of his piss and his cum and left with just Izuku's cock still deep inside.

Izuku's hand hasn't left his neck, but was no longer choking him. Instead,

it was a steadying presence that left him mewling almost like a cat as he blinked his eyes open again.

"There we go," Izuku praises. "Come back to me, Kacchan."

He punctuates the tender words with a soft kiss on his cheek.

Katsuki groans, throat sore.

Izuku slowly slides his cock out, messy with his spend. Some spills out and mixes with the pee that hasn't yet soaked into the bedspread, and Izuku rocks back on his haunches to hold Katsuki open and watch.

Katsuki shoves his hands against his face, furiously embarrassed.

"Fuckin' asshole," Katsuki gripes, with little heat behind the words. He's still trembling, and Izuku gathers him in his arms tenderly as if he hadn't just made him cum (basically twice) without meaning to.

Katsuki allows it to happen, limbs still figuring out how to work again.

He leans heavily on Izuku's chest as Izuku sits him up, shifting him up and away from the absolute /mess/ in the middle of the bed.

He ends up in Izuku's lap, face to face at the dry edge of the bed. Izuku's arms curve around his hips,

resting in the small of his back so that he can feel Katsuki's calming heartbeat at the base of his spine.

"Sorry, my love." Izuku is grinning cheekily as he says the words, so tender and soft, and Katsuki rolls his eyes.

"Mm, yeah. Fuck you." Katsuki dips his head down to peck across Izuku's lips, just to taste him again. "I oughta show you how it felt."

Izuku laughs, nearly knocking Katsuki out of his lap. But his cheeks go a soft pink as the words race through his mind,

and Katsuki grins dangerously at him. Because, just like that, Izuku is the prey that just stepped in a spiked trap.

He kisses Izuku again, parting his lips with his own and taking the lower in his mouth. He suckles against the kissed-swollen skin,

nibbles once or twice just to make sure Izuku will feel it once he leaves it wet.

Izuku tightens the hold he has on Katsuki's hips, palm to palm with the skin. Between his legs, his cock is hardening all over again. It knocks into Katsuki's own, still messy with what happened.

Katsuki grinds forward, against it, and tilts Izuku's head up with his chin.

Then he wraps both hands around either side of Izuku's neck, pressing the thumbs to his jugulars. He probably couldn't fit one hand around it like Izuku could to his but… he could make it fucking work.

And Deku is looking up at him like he /wants/ it oh, so fucking badly.

"Yeah? Want me to?"

Izuku shivers at the tone. Katsuki's voice has changed as if it got dipped in honey and gold, and Izuku is addicted to it already.

He gets close enough that Izuku can feel how Katsuki's breath tickles across his nerve-endings. He tilts Izuku's head up with his thumbs, shifting up onto his knees to further the difference in height.

His eyes are half-lidded, darkened with arousal as he imagines Izuku stuffed beneath him and taking everything that Katsuki gives.

Katsuki squeezes, just once, and Izuku's head swims.

"Yes, /please/."

surprise! i collabed with aze for this fic (AND I GOT PERMISSION TO POST IT HERE DONT CANCEL ME-)

happy birthday mush!!!

[art by @Azreto]

// end

buy me a ko-fi so i can use it to buy mush a late birthday ko-fi https://ko-fi.com/mamalade 

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