Thread by @Blu3Dragonfruit

#bkdk #nsfw #fluff #ficthread #abokink
College AU where jock!Katsuki asks nerd!Izuku to tutor him because he desperately needs to get higher grades if he wants to pass this year.
And then little nerdy Deku ends up being tutored by Katsuki on how to ride his monster cock.

Turns out innocent blushing Deku is actually a slut who just wants a big strong man to fuck the shit out of him until he's a sobbing mess, unable to form any coherent thoughts. Just praising and begging Katsuki to keep fucking him, keep touching him, slap him /harder/, /harder/,

"oh, /God/, Kacchan!"
He stares at the huge pile of muscles that is Katsuki and keeps touching him all over, wanting to feel every inch of his muscled body that is twice the size of his.
When he strokes and stares at his shoulders in awe, they feel /endless/. They're so broad,

almost never-ending.
He feels so /tiny/ in his hold, and he loves it.
Katsuki's cock feels like it could rip the stretched out walls of his ass any second, barely fitting inside, and Izuku loves it.
He loves the bulge he gets in his tummy and keeps a hand on it to feel Katsuki's

dick under his palm as he pounds him mercilessly.
Loves how Katsuki gropes and strokes and kisses his neck and ear so sweetly, making him feel like a goddess, only to grab his face in one hand and spit in his mouth two seconds later.
And he gladly takes it.
Katsuki calls him his

sweet little doll. Keeps calling him 'doll face', and he loves it so much.
He'll be a good little doll for Katsuki and choke and go dumb and stupid on that huge cock for him.
He loves it when Katsuki takes his neck in his hand, presses his palm on it, making his eyes roll as he

tries to keep his eyes on him.
He still wants to look at him.
But he feels so good he wonders if this is what it feels like to be on drugs.
His tongue lolls out and sweet little sounds leave his lips as Katsuki chokes him and fucks him hard.
"Fuck, Deku," Katsuki gives his ass a

good appreciative slap, sinks his fingers into that jiggling flesh because his ass is /so fat/, there's so much to grab.
Not even his huge hands can cover the surface of his asscheeks entirely.
He presses a big kiss on those red lips, then shakes his hand on Izuku's asscheek to

watch it jiggle.
He gropes it and slaps it to make it redder and redder.
He laughs at the handprints on his freckled pale skin. "So fucking pretty, baby."
He watches in amusement as Izuku's head is shaken by the merciless thrusts, loud moans fill his ears and Izuku keeps on

crying.
He cries, and cries, and cries. "God. You're just a crybaby, aren't you, dollface," Katsuki /buries/ himself into Izuku, pressing his dick into his prostate by pulling his hipbones towards himself with no restraints.
"Mmm- YES!" Izuku's eyes roll into his skull again,

"Yes, Kacchan! Love you so much, Kacchan- so strong," he keeps blabbering through tears.
Katsuki laughs. "Yeah? Are you just a crybaby nerdy whore, Deku?"
"Ohh, yes! Yes, Kacchan- 'm a crybaby," he moans.
"Good boy."
And Izuku nearly comes.

"Whose crybaby are you, sweetheart?"
"Ah- Yours!" Izuku is /so/ far gone. He can't filter and control what he says anymore. He just voices every thought on his mind.
"Yours, alpha, only your-" Katsuki laughs harder.
"What, Deku? What'd you just call me?"
Izuku realises and his

face goes cherry red.
He's fantasized about this so many times, it's insane.
He's thought about choking on Katsuki's enormous cock and being pounded like a bitch in heat by him, so many times.
Sometimes, he likes to imagine Katsuki as his alpha as he jerks off.

Likes to picture himself as his pretty little omega, being knotted by him every chance he gets.
And now, it just came out.
He just called Katsuki 'alpha'.
"A-Al..." "Say it, Deku."
"A-Alpha..."
"/Fuck/, you're such a fucking nerd."

He fucks him impossibly harder, thought turning him on surprisingly hard.
Izuku is a sobbing mess. "Kacchan, 'm sorry, I-"
"It's fucking fine, Deku," he strokes his curls reassuringly, then gives his ass another slap for good measure.
Izuku bites his lip, trying not to come.

"So this means you only want me, Deku?"
Izuku nods eagerly, wanting to touch more of him.
"Yes! Kacchan! Ah-" "fuck, you're fucking adorable when you call me that."
Izuku cries harder, bites his lip. "W-want you only for myself, Kacchan..."
Katsuki's eyes light up.

He doesn't know what Izuku thinks of him. He might think he's fucked half the campus - and he has - but that doesn't mean shit.
He only wants Izuku. That's who he likes.
He's had a big fucking crush on him since he first saw him, and all Katsuki he wants is to have /him/ for

himself.
"Y-Yeah, baby?" His breathing becomes irregular as he gets closer to his orgasm, cages Izuku in his arms.
"Fuck- I only want you, Deku." He groans deeply and reveals his feelings to Izuku, reassures him. "I won't fuck anyone else, I just want you."

Izuku is so happy he could die.
He moans shamelessly on Katsuki's cock.
He struggles to let out any words other than moaning sounds that make no sense.
He stutters while looking at Katsuki, scans him all over. "M-Mine...?"
Katsuki fake-bites his freckled cheek, moving his glasses

slightly as he does. "Yes, Deku, all yours."
Izuku's eyes light up so bright. "M-Mine... And n-no one else's?"
Katsuki has to momentarily stop and slow his thrusts, or he's going to come.
He lowers his face to be only a couple of inches away from Izuku's.

"Mine... And no one else's?" He boops his freckled nose.
Izuku blushes cherry red, and he nods impatiently fast.
"Yes, Kacchan! Just yours, Kacchan!"
"Then yes." He resumes his thrusts slowly. "Yours and no one else's, Deku."
Izuku cries and cries with what water he has left in

his body, clings to Katsuki's shoulders for dear life.
He's in heaven.
Katsuki's thrusts resume, somehow even harder than before.
Izuku's going to pass out.
"Fuck- Kacchan, I love you! Love you so much, Kacchan, so amazing- Ah!"

The way Izuku fanboys about him makes Katsuki's dick throb.
"Shit, keep talking, baby. Keep talking," he pulls out of Izuku and sits the nerd up.
He stands on his knees in front of him, brings his cock in front of Izuku's open, inviting lips and hanging tongue.

He pumps it hard, grips his green curls and groans while looking at Izuku's innocent, crying, cock-hungry eyes.
They look up at him from below, big and glossy and worshipping him like a greek god.
Big doe eyes eagerly waiting for him to come.
"Fuck, Deku- gonna come on your face,

baby," he slaps his cock on Izuku's tongue and pumps it hard.
"Please, Kacchan! Want your cum on my face," he begs.
One second later, strings of cum coat Izuku's face, tongue and hair.
"Ohhh, fuuck, baby," Katsuki buries his face into the base of his dick and thrusts it across

his face.
As he rides out his orgasm, Katsuki looks at Izuku's dick.
Izuku's legs and abdomen are covered in his own cum, still twitching slightly as his hand loosely cups his balls.
"Ugh, good boy, Deku," he breathes deeply, going down from the high.

He removes his cock from Izuku's face and ruffles his hair affectionately.
Izuku looks up at him with big doe eyes still, so loving and so sweet.
"God, you're a fucking dream, Deku."
He sits down and collapses next to Izuku, exhausted.
He breathes deeply into the pillow, smiling

as he does.
His arms goes to wrap around Izuku's waist, but Izuku gives no response.
He tugs at it a few times before hearing Izuku sniffling and sighing.
He sits up immediately, looking for Izuku's face.
"Hey, Deku, what's-" "I'm sorry, Kacchan, I'll go get my things now."

Izuku tries to get up, but Katsuki stops him.
"Hey, no no no, what's going on? Why are you leaving?"
Izuku dries his tears. "Well... I know what you said earlier isn't true, it was just-" "What?"
Izuku stares back in disbelief.
"What... 'What'?"

"Deku, I meant every word I said."
Izuku remains silent, so Katsuki continues.
"When I said I fucking liked you, and I wanted you all for myself... I fucking meant that, Deku."
Katsuki watches Izuku's face light up for the second time that day, and he loves it.
"You... You do?"

Katsuki nods. "Yeah, nerd. I do." He grabs his hand tightly. "Did you?"
Izuku blushes deeply and talks shyly. "Yes, Kacchan. Every word."
"Good!" Katsuki lies back down and brings Izuku with him this time. "Don't do that again, though, nerd. Gave me a fucking heart attack."

He ruffles his hair one more time and wipes the cum off his freckled cheek, then bites it softly.
Izuku chuckles into his embrace, getting as close as he possibly can.
"S-So, um..." He fixes his glasses on his nose, then makes his index fingers touch repeatedly.
Katsuki grins

cockily. /Adorable. And it's all mine./
"Yes, freckles?"
Izuku's fingers miss each other in panic at the nickname, stuttering and muttering again.
"I- well...! Um, so-" He takes a deep breath. "So... What are we, now?"
Katsuki shrugs. "I wanna date you."
Izuku nearly chokes on

air. "YOU WANNA-" he hits his own chest with a fist, gasping for air.
"Yes, Deku. I wanna fucking date you." He sighs, looking elsewhere as a faint blush colors his cheeks, too.
"Let's just... Try it out, and see how it goes." He looks back at Izuku. "'That fine?"
Izuku nods hard

and fast, like a cute bunny.
"Yes, Kacchan. That's fine," he leans into his neck, bats his pretty eyelashes once again.
/Fucking adorable./
Six months later, Katsuki still calls Izuku 'freckles', and the nerd still blushes wildly at it every time.

"K-Kacchan!" He tucks a strand of hair behind his ear. "You know what that does to me...! We're in public!"
Katsuki shrugs. "Well? It's better that way. 'No one to steal you from me if they know you wanna have my babies and shit." He pauses, clicks his tongue with a smug smirk on

his face.
"After all, /I'm your boyfriend/."

The end! Thanks for reading (〜￣▽￣)〜