[NSFW] FIC - "Five times Katsuki and Izuku Have Sex"

BKDKBK | post-canon | first times | switching | crack treated seriously

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FIVE TIMES KATSUKI AND IZUKU HAVE SEX

01. “Wait, what... where do you think you’re putting that?!”

“Where the hell do you think I’m putting it, you damned nerd?! Do you see anywhere else it’s supposed to go?!”

“Why does it have to go anywhere?!”

“...”

“What are you...? No, don’t put it away!”

02. Their first time is a disaster. Katsuki gets in a single thrust before he comes, and it's only Izuku’s pleading that stops him from storming out in red-faced mortification. So, to save face, he spreads his legs and challenges Izuku to do better. 

Izuku takes one look at the tight pink furl of Katsuki’s entrance and comes all over his thighs.

On the bright side, this means they set the bar at rock bottom, and Izuku is convinced their second try will be more successful (and because Katsuki refuses to let that disgrace stand).

03. They eventually get the hang of it. Izuku thinks maybe he understands a bit of Mineta’s and Kaminari’s obsession with sex because getting Katsuki alone is suddenly all he can think about.

Immediately after returning from his internship, Izuku has Katsuki up against his bedroom door, pants around their ankles, pale thighs wrapped around flexing hips as Izuku shoves into him. Katsuki buries his face against Izuku’s neck, cursing and moaning for Izuku to go “harder, faster, come on, fuck me like you mean it.”

04. When the newness fades, when they’re no longer blindsided by the intensity of their desire for each other, Katsuki discovers an appreciation for details. Like the way Izuku nudges his nose into the crevice of skin beneath Katsuki’s jaw and inhales just before pushing into him. Or the way Katsuki refuses to come first when Izuku’s clamping down around him so he shifts positions and adjusts his angle until he finds the right spot that makes Izuku tremble and cry out.

The way Izuku’s hands roam restlessly, hungrily across Katsuki’s skin, digging nails into his back, his waist, before sliding between his cheeks and pressing into him because they’ve also learned that preparation is key.

Katsuki sucks on the thin skin over Izuku’s hips, trails a fingertip up the shaft of his cock, deliberation and attention in every touch, every kiss, every taste. He knows Izuku appreciates the details as well.

05. Izuku has a close call on a long-distance mission with some remnant AFO loyalists. When he returns to the dorms, that night, Katsuki slips into his room. Izuku tries to turn him out, because he’s both tired and wired from the encounter, and his thoughts are kilometers and years away.

But Katsuki will have none of it so he provokes and pushes until Izuku is thrashing beneath him, ankles hooked around his calves as he thrusts upward. All traces of decorum are thrown to the wind as Izuku rears up and devours Katsuki’s mouth.

Hands tear at clothing, something rips, the sound loud and sudden. But neither of them can be bothered to care as Katsuki flips Izuku onto his stomach, holding him down with a fist in green curls.

“Damned nerd,” Katsuki says, his knees shoving Izuku’s legs further apart.

Izuku arches his back, pushes his ass high, then reaches back to shove his fingers into himself and spread his cheeks.

“Don’t you dare fucking lose to them now.” Katsuki takes him without preparation, and Izuku almost bites his lip bloody to keep from crying out. “Don’t lose. I’ll fucking kill you if you do.”

Izuku moans encouragement. He claws at the sheets, gropes for Katsuki’s hand and grips it tight. “I got it,” he pants roughly. And then adds, “Love you, too.”

~fin