@deerop0: Bkdk a/b/o where a quirk bring...

Bkdk a/b/o where a quirk brings UA Deku to the future

(This shit KINKY)

Izuku twiddles his thumbs as he stands outside of future-his and Katsuki’s bedroom, listening to the slap of skin on skin and moans coming from the other side of the door.

“Yes, alpha!” future-Izuku whines, and a loud slap tells past-Izuku that Katsuki just slapped him on the ass. Or the face. Maybe he’s into that.

“Little painslut, huh?” Katsuki growls, and past-Izuku feels himself involuntarily slick up.

It’s hard enough to believe that he ends up with /Kacchan/ - the blond still hates him in his time, constantly blowing up in his face and screaming whenever Izuku dares cross his path.

But, as future-Katsuki had told him, that’s just because past-Katsuki doesn’t know how to handle his feelings yet.

The future version of himself and Kacchan had been kind enough to let him stay with them when he’d wound up here in the middle of a battle.

It’s been a little over a week, and Izuku was starting to get a bit used to the flow of things.

Until now.

He was already aware of the fact that future-Izuku and Katsuki have… sex. But he’d been good about avoiding it.

Until now.

He was just walking to the kitchen for a drink when he heard the future version of himself moan softly, and he just wanted to make sure everything was alright, okay?

He can’t explain why he’s been standing here for ten minutes, rubbing his thighs together uncomfortably.

Eventually, the noise on the other side of the door stops, and a few heated whispers are shared.

“No, you go talk to him!” Future-Izuku hisses, and a moment later, the door opens to reveal a shirtless Katsuki with a towel wrapped around his hips.

“Hey squirt,” Katsuki says awkwardly, scratching his chiseled abs. “Izuku and I were just - showering… when we smelled you out here. Everything okay?”

He’s good enough of a person to not mention the fact that it had been past-Izuku’s blatant arousal that they’d smelled.

“Y-yeah!” Past-Izuku squeaks, holding his hands in front of his slicked sleep pants. “I was just grabbing a… snack.”

“Honey,” future-Izuku coos from the bed, covered in a blanket. “It’s okay if you were curious.”

Past-Izuku’s face is burning, eyes watery with embarrassed tears as he looks at the floor and sniffles. “It’s just… Kacchan hates me and I w-wanted to…”

Katsuki raises his eyebrow when Izuku trails off, tipping the omega’s face up gently with his thumb.

“Don’t listen to anything that little shit says to you,” Katsuki says sincerely. “He’s angrily jerking off to the thought of fucking you every night.”

“Keep in mind that little shit is /you/!” Future-Izuku chirps helpfully from the bed.

“Case in point,” Katsuki grins. “I know all his dirty little secrets. Like when I stole a pair of your panties in first year -“

“He doesn’t need to know that!” Future-Izuku protests.

Katsuki shrugs. “It’s not like the pip squeak is gonna remember any of this. Why don’t we let him watch?”

“Oh my god, I wish people knew how much of a pervert you are,” future-Izuku groans, falling back against the pillows.

“What do you say?” Katsuki asks past-Izuku lowly, his eyes glinting with hunger. “Want a front row seat of what’s in your future?”

Past-Izuku’s blush burns brighter, and he can only nod mutely, stepping into the door as Katsuki clicks the door closed behind him.

Future-Izuku opens his arms, and past-Izuku immediately snuggles into them.

“Kacchan loves you, even in your time. Trust me,” future-Izuku coos. “You don’t have to just watch, you know. Kacchan’s big enough to go around.”

“Y-you’d let me?” Izuku asks his future self, pulling back to look at his face.

“Of course,” past-Izuku says gently, cupping his face. “He’s yours too, you know. You just don’t know it yet.”

Past-Izuku’s eyes flutter closed as future-Izuku tips his face up, their soft, identical lips meeting gently.

“And you call me a fucking pervert,” Katsuki groans, squeezing himself through the towel as he watches. “Fuck, that’s hot.”

Past-Izuku tentatively pokes his tongue out, moaning when future-Izuku’s immediately meets his, the kiss turning from sweet to filthy in the blink of an eye.

“Fuck yes,” Katsuki growls, and past-Izuku peeks open one his eyes just in time to see the towel drop.

Katsuki grabs himself at the base, slowly jerking himself off, the shaft still glistening from being buried deep in future-Izuku’s pussy.

Past-Izuku’s own pussy clenches, feeling himself get uncomfortably slick from the sight.

“Baby boy likes that,” Katsuki commentates, eyes lidded as he watches his mate and past self make out sloppily.

The blond makes his way over languidly, and the two Izukus pull apart with a moan, both of them blushing prettily.

“Watch me, okay?” Future-Izuku purrs to his counterpart, pulling Katsuki closer so he’s between the two of them, standing at the edge of the bed.

Future-Izuku’s lips meet the side of the blond’s hard cock, pressing a kiss to the throbbing length.

“Do you wanna try?” Future-Izuku asks gently, and past-Izuku immediately nods, embarrassingly eager.

Katsuki rests a gentle hand on past-Izuku’s head, tangling his fingers into his soft hair as the omega presses a shy kiss to his cock.

“This cock is gonna make you feel so good once this daft asshole finally confesses in your time,” future-Izuku says, biting his bottom lip as he watches the younger version of himself peek his tongue out to lick at the shaft.

“Just don’t judge how fast I cum the first time we fuck,” Katsuki laughs breathlessly. “It gets better, I promise.”

Past-Izuku giggles, pulling back to tentatively suck the tip between his lips, face burning red and eyes halfway closed.

“Kacchan tastes so good,” past-Izuku slurs, pulling away for a second, already cock drunk.

Future-Izuku smiles and kisses him with Katsuki’s cockhead between them, their tongues dancing around the tip.

Katsuki could get used to this.

TBC

Future-Izuku pulls away from the cockhead with a sigh, watching as past-Izuku continues to tongue at it with shy kitten licks, eyes watery and blissed out.

“Do you wanna suck his cock?” Future-Izuku asks, watching his past self in amusement.

“Mhm,” past-Izuku purrs as he continues to lick the tip like he’s eating a damn ice cream cone.

“I’ll never let myself live down the fact that I coulda been fucking you years earlier,” Katsuki groans, eyes hooded as he watches the younger Izuku lick at him.

“Your loss,” future-Izuku sings with a grin, kissing the blond sweetly. “Maybe this’ll make up for it, baby.”

Past-Izuku is back to sucking the tip shallowly, looking up at Katsuki and future-Izuku with wide eyes, shyly waiting to be instructed.

Future-Izuku runs his hand through past-Izuku’s hair, grasping gently, just enough pressure to help guide him.

“Get that mouth nice and wet,” future-Izuku purrs, kissing his past-self’s cheek sweetly.

“Just relax and mind your teeth, babydoll,” Katsuki says, cock pulsing at the sight of two Izukus - how’d he get so damn lucky? “We’re gonna go slow.”

Past-Izuku begins to bob his head shallowly on his own, future-Izuku slowly guiding him with the hand in his hair.

“Almost forgot you were a natural born cocksucker,” Katsuki groans, keeping his hips completely still as the younger Izuku sucks cock for the first time.

“There we go,” future-Izuku praises, gently guiding his head a little further down as he bobs.

“Such a hot little mouth,” Katsuki growls, his hips finally breaking the facade as he snaps them forward jerkily, pushing another inch of his cock down past-Izuku’s throat.

The younger Izuku sputters just a bit, but he doesn’t falter, pressing down further.

Past-Izuku moans around the length like he’s seen the omegas in porn do, warmth blossoming in his chest and pussy when Katsuki groans brokenly at the feeling.

Drool messily slides down past-Izuku’s chin and drips to the bed, but none of them find it in themselves to care.

Future-Izuku coos at his past self as he nearly gets to the base of Katsuki’s impressive cock, his throat spasming at the feeling of taking something so deep.

“Use that tongue on him,” future-Izuku instructs, grinning when past-Izuku begins to stroke the underside of Katsuki’s cock with his tongue as he attempts to deepthroat him.

“Fuuuck, that’s good,” Katsuki groans, head tipped towards the ceiling as stars burst behind his eyelids.

“Breathe through your nose, relax your throat,” future-Izuku instructs patiently, guiding past-Izuku down to the base, letting the boy move up and down the bottom of the shaft on his own as he finds out what it feels like to take his Kacchan all the way down his throat.

Suddenly, a rougher, bigger hand slides into past-Izuku’s hair, pulling him off with a firm, gentle tug.

A line of saliva connects past-Izuku’s abused mouth to the rock hard length, and the omega licks his lips to break it.

“Was gonna cum straight down your throat if you continued that shit,” Katsuki says with a smirk. “Don’t you want this in that tight little pussy?”

“Kacchan,” future-Izuku chastises. “Remember what Aizawa said? Little me won’t remember any of this, but his body will. Anything you do to him will… stay with him. Including taking his virginity.”

Katsuki shrugs. “I don’t mind cucking my past self.”

“You’re a bad person,” future-Izuku says sternly, but his eyes are full of amusement. “Do you wanna fuck my Kacchan, little me?”

“Yes!” Past-Izuku squeaks immediately, his hand flying to his mouth in embarrassment at his own enthusiasm. “I-if that’s okay.”

“God, he’s so cute,” future-Izuku groans. “Why is past-me so cute?”

“Because you’re cute, you little whore,” Katsuki growls, groping future-Izuku’s bubbly ass. “You wanna watch me defile little you?”

“Fuck yes,” future-Izuku purrs, and Katsuki cups past-Izuku’s chin, not letting him feel left out as he presses their lips together in a sweet kiss.

It’s past-Izuku’s first time kissing Kacchan, in any timeline, and melts into it, moaning softly and face burning bright red like he wasn’t just sucking on the man’s cock like a lollipop, deepthroating him to the base.

“Taste just the same,” Katsuki growls, kissing future-Izuku immediately after their own a bit more filthy as past-Izuku watches hungrily.

When they pull apart, future-Izuku helps his past self strip out of his oversized nightshirt and sleep shorts.

“Same tight little body, too,” Katsuki says predatorily, red eyes sharp as he watches his mate get their little fucktoy nice and undressed, his lithe, toned body naked against their silk sheets.

Future-Izuku coos, naked himself as he lets the blanket fall, reaching down to spread past-Izuku’s virgin pussy open with his fingers in an upside-down v-shape.

Past-Izuku whines, covering his face, his hole clenching in the open air as Katsuki watches with a smirk.

“Before I ruined this pussy for anyone else,” Katsuki drawls, reaching down to rub his rough thumb on that tight little clit. “Just how I remember it.”

“Why don’t you be a good alpha and eat him out, baby?” Future-Izuku purrs.

“Don’t have to tell me twice,” Katsuki groans, cock bobbing in the air as he positions himself and immediately swipes through his pussy lips with his broad tongue, slow and languid and teasing.

“Oh - f-fuck!” Past-Izuku whimpers, head falling back against future-Izuku’s chest.

“Mmm, you like that?” Future-Izuku teases, amused at the cuss. “Kacchan is so good at eating us out.”

“More!” past-Izuku begs, squealing when Katsuki wraps his lips around his clit, flicking at it rapidly with his wet tongue. “Oh, Kacchan, alpha!”

Katsuki uses his big hands to spread the younger Izuku’s thighs open, licking his tongue up into his pussy so he can fuck him out on it.

Past-Izuku throws his head back, letting out an obscenely loud, high-pitched moan, and Katsuki grins into his meal.

TBC

Past-Izuku’s thighs fight to squeeze around Katsuki’s head, but the blond keeps them obediently spread with his flexed biceps, moaning as he eats the smaller Izuku out with vigor.

“D-don’t!” Past-Izuku nearly screams. “I’m gonna - I’m gonna cum, I’m sorry alpha -,”

“Fucking cum for me,” Katsuki groans into his pussy, licking back and forth across his tight hole, swallowing his slick like it’s a drug.

Future-Izuku is rubbing circles over his past-self’s clit as Katsuki fucks that pussy open on his big tongue, eyes hooded as he watches.

“T-too much,” past-Izuku sobs, tears streaming down his face as he’s assaulted by pleasure, and the two of them don’t let up until the younger Izuku’s abdomen clenches with an impending orgasm.

“G-gonna cum - c-cumming!” past-Izuku whimpers, thighs shaking.

Katsuki just presses his wiggling tongue in deep, and past-Izuku buries his small hands in blond hair, pulling as he throws his head back and wails, humping his hips down again the alpha’s face as best he can.

Slick coats Katsuki’s chin and neck when he pulls back, and he casually wipes it away with his discarded tank top, licking away the wetness clinging to his lips.

“Such a good little fucktoy,” Katsuki growls, crawling over past-Izuku’s body to kiss him filthily.

The omega whimpers at the taste of himself, their tongues pressing against each other hungrily.

“Want you to f-fuck me,” past-Izuku pants between kisses, his whole body burning with need as future-Izuku toys with his nipples.

“What do you think?” Katsuki asks future-Izuku, moving up to kiss him. “You think his pussy is ready to take me?”

“There’s no such thing as prepared for that monster,” future-Izuku giggles, stroking his mate’s length slowly.

“I can take it!” Past-Izuku says indignantly, eagerly clambering to get on his knees and arch his back in a presenting pose, wagging his hips back and forth teasingly.

“Holy fuck,” Katsuki groans, and future-Izuku squeezes around the length that throbs in response.

Future-Izuku settles in front of past-Izuku, pressing their lips together as Katsuki positions himself behind the younger, his thick cockhead rubbing between his slick folds wetly.

“Just relax for me, okay?” Future-Izuku coos, their lips rubbing together.

Katsuki holds the younger omega’s hips in his big hands, oh so slowly pressing forward so that the tip pops inside past-Izuku’s tight, wet hole.

The younger omega lets out a quiet sob, desperately kissing his older self to distract himself from the slight pain.

“It’s okay, shh,” future-Izuku soothes, rubbing soothing circles along his back. “Kacchan is big, but it’ll only hurt for a minute. I promise.”

Past-Izuku nods, his eyes squeezing shut as Katsuki slowly sinks himself into his virgin hole, steady and firm.

“There we go,” Katsuki says softly, pressing the last of his cock into that tight, wet heat, his balls pressed against the omega’s pussy as he gently gyrates his hips, not thrusting as past-Izuku gets used to the stretch.

“It’s too b-big,” past-Izuku cries quietly, but his hips press back as much as they can, his pussy clenching and slicking around the length that’s stretching it out, owning it.

“I need you to relax that pussy for me, okay?” Katsuki says huskily, nibbling past-Izuku’s ear.

Future-Izuku kisses his younger self through it, reaching under him to rub and tease at one of his pink nipples, distracting him from the way his pussy is filled to the brim for the very first time.

After another minute of Katsuki’s hips circling gently and future-Izuku’s gentle touches, past-Izuku takes in a stuttering breath.

“M-move,” the younger omega begs.

Katsuki doesn’t hesitate, pulling his hips back so that only the tip remains, thrusting back inside in one fluid, firm fuck forward.

“Mnnn,” past-Izuku moans loudly, and Katsuki says a silent prayer for their neighbors.

“It’s starting to feel good, right?” Future-Izuku purrs, holding his past-self’s hand as Katsuki’s pounding begins to pick up its pace.

“F-feels so good,” past-Izuku whines, his eyes lidded and fucked out, drool oozing from the corners his mouth.

“Feels fucking incredible over here too, sweetheart,” Katsuki groans, swearing loudly as he begins to piston his hips in and out.

“Oh!” Past-Izuku squeals, gripping the sheets tight as he’s railed. “Right there, alpha! Right there!”

“Here?” Katsuki asks smugly, pumping in at the same angle and leaving past-Izuku a screaming mess.

Future-Izuku reaches under the fucking pair to play with past-Izuku’s clit, grinning at the way Katsuki growls when the younger omega clenches at the feeling.

“This pussy is fucking massaging my cock,” Katsuki teases, heavy balls slapping against past-Izuku’s clit and future-Izuku’s hand loudly.

“You’re gonna make me cum!” past-Izuku moans at them both, tongue lolling out of his mouth as his eyes cross.

“Cum on this cock,” Katsuki demands, slapping one of past-Izuku’s bubbly ass cheeks, groping it in one of his big hand as the other slides into his hair, pulling and yanking as he continues to pound into him.

Past-Izuku’s hips jerk with a squeal as he cums around Katsuki’s cock, clenching tight as a fresh rush of slick coats the length.

“There it is,” Katsuki says appreciatively, fucking him right through it.

TBC

Future-Izuku has shimmied his way underneath past-Izuku as the younger is pounded from behind, the two of them kissing languidly as Katsuki growls and grunts above.

“You’re so pretty,” future-Izuku purrs against his past-self’s lips, grinning at his blush.

Past-Izuku squeaks in surprise when their kiss breaks, future-Izuku making his way down further so that he’s face to face with Katsuki’s thick cock pistoning into past-Izuku’s wet pussy, his own abdomen clenching in arousal at the sight.

“Oh my god, too much! Too much!” Past-Izuku nearly screams as future-Izuku swipes his tongue over his wet clit before wrapping his lips around the little bud, sucking on it softly with a moan.

“Holy fuck,” Katsuki groans when he realizes what’s going on. “That’s fucking hot.”

Future-Izuku giggles, pulling back and teasing the sensitive bundle of nerves with the very tip of his tongue, circling around it.

“I’m gonna c-cum again,” past-Izuku sobs out, clearly overstimulated from pleasure.

“Fucking do it,” Katsuki growls, holding the back of past-Izuku’s neck and pushing his face down into future-Izuku’s own soaked pussy, wet and neglected from watching his mate fuck his younger self.

Past-Izuku licks at it shyly, clearly not sure what to do but enthusiastic as his tongue picks up the pace, slowly slurping over the older Izuku’s folds and clit.

“Mm,” future-Izuku moans, and the vibration has past-Izuku squeezing his eyes shut as he cums again.

Katsuki doesn’t falter his thrusts one bit as past-Izuku tightens around him yet again, clenching rhythmically.

Future-Izuku moans and licks his clit until the wave of an orgasm comes to an end, past-Izuku’s body going boneless as he continues to slowly eat his future self out.

“Your turn, baby,” Katsuki says with a feral grin, leaning over past-Izuku and holding himself up on one strong arm as the other hand reaches to slide two fingers into his mate’s wet pussy, fingers pistoning in and out as past-Izuku moves to suck on his clit.

“Oh, fuck,” future-Izuku moans, legs shaking as he’s firmly, roughly fucked on those familiar, thick fingers.

“You gonna cum for us?” Katsuki groans, and past-Izuku hums against his future self’s clit in agreement.

“Yes, yes!” Future-Izuku whimpers, humping down against the fingers and tongue working him over. “Gonna!”

With a long whine, the older omega reaches his own release, tipping his head back as stars burst behind his eyelids, galaxies and supernovas bursting in the dark.

“Good omegas,” Katsuki says, exuding self-satisfaction now that he’s gotten both of his partners off.

Once future-Izuku recovers, he leans up and sucks one of Katsuki’s balls into his hot mouth as the alpha fucks past-Izuku ruthlessly, finally chasing his own orgasm.

“Holy fuuuuck,” Katsuki moans, embarrassed at his own voice as his mate licks and sucks at his full balls.

“Fill him up,” future-Izuku moans, licking the seam before sucking the other ball in as Katsuki’s knot begins to beat against past-Izuku’s abused pussy lips.

“Please,” past-Izuku echoes, a fucked-out mess from where his head lays against future-Izuku’s thigh, his face wet with overstimulated tears, mouth open and drooling again his future self’s skin.

“Fucking - hell,” Katsuki groans as he fucks in deep for a few more powerful thrusts, his knot inflating to catch inside that tight clutch, his balls throbbing in future-Izuku’s mouth as he pumps out an obscene amount of virile cum, filling past-Izuku’s womb all the way up.

“So good,” past-Izuku purrs, sighing and adjusting his hips as he takes every last drop of Katsuki’s load.

Future-Izuku hums and closes his eyes, sucking Katsuki’s balls through it until the alpha’s hips jerk with his own overstimulation.

The three of them catch their breath for a moment, all of them satisfied and floating on cloud nine.

Katsuki falls to the side, pulling past-Izuku with him as his knot stays firmly inside, and the younger Izuku immediately pulls future-Izuku into his arms as he rights himself.

“That was amazing,” past-Izuku says, his eyes already fluttering closed from exhaustion. “Thank you.”

“No… thank you, baby,” future-Izuku says softly, kissing Katsuki as the youngest falls asleep between them.

-

Izuku wakes up in his bed with a gasp, completely naked - his poor pussy aching is the only indication that he really just did travel to the /future/ and that wasn’t just a hyper-realistic wet dream.

“Oh my god,” he groans, body aching pleasantly as he rolls out of bed. “I ate my own pussy.”

-

/One year later/

Katsuki’s face burns red as he fumbles with his sweatpants, leaning down to kiss Izuku as he pulls his hard cock out.

Izuku’s own face matches with a pretty blush, and he reaches down to wrap his scarred hand around the length, stroking it slowly.

“I promise I won’t judge how fast you cum,” Izuku says sincerely.

“What the fuck?” Katsuki growls.

FIN