Thread by @princejael01

#DKBK #NSFW #fluff #shortstory
No quirks AU, simping!Bkg, hot-nerd!Dk, some choking, public frotting

****

Katsuki has been thirsting after his new next-door neighbor for weeks.

The freckled nerd is just too fucking hot in his dorky superhero t-shirts that stretched over his broad shoulders, and those dumb shorts that showed off way too much of his thick, powerful thighs.

Those freckles of his are so captivating too, and his wild green curls make him look like a tree—a tree that Katsuki is desperate to climb.

It also didn't help that the guy was not only hot, but he was also unbelievably nice, making sure Katsuki got his packages, or lending him some of his detergent when he carelessly forgets to bring his own when they’re both down at the building laundry room.

He even befriended the grumpy orange tabby that loitered around the building, which was a big check mark in Katsuki's book.

That cat was a nasty thing, peeing and pooping in front of doors, yowling at ungodly hours and viciously attacking anyone that tries to touch it.

He was Katsuki's spirit animal, and he adored the little hellbeast, lovingly naming him Satan's Ass.

He'd leave food and treats for him on his balcony, and after Satan's Ass stopped peeing on his door, Katsuki really thought they had formed a special bond.

That is, until one night, Katsuki found the treacherous shit on the adjacent balcony, purring happily as his hot neighbor gently groomed his matted fur.

"Oh fuck no, Satan's Ass is mine!"

Those were the first words he ever said to the guy.

All their succeeding encounters were just as terrible.

Flirting was easy when you're in a dark, noisy bar and your potential hook-up's brain was already drowning in ten shots of tequila. But in the real world, Katsuki's tongue defaults back to "rude, asshole" settings+

+ which didn't help his case at all.

Hell, it's been weeks since the guy moved in and Katsuki hasn't introduced himself or learned the guy's name. In the few times they actually "talked" Katsuki always says something so unbelievably stupid that he's forced to flee in shame.

It's like all his game jumps out the window whenever he sees those pretty green eyes, and god forbid the nerd actually /smiles/ at him, because then Katsuki would cancel all his plans and spend the rest of the day staring at the wall, thinking of names for their future children.

It's pitiful. It's pathetic. It's not like Katsuki at all!

So after two months, Katsuki decides that enough is enough. He's not the type to just give up! If his shitty mouth won't help him seduce the nerd, then his body will just have to do the talking for him.

Or at least, that's what his friend Mina suggested, when he finally caved and asked for her advice.

So now here he is, in the apartment elevator with his crush, tightly gripping a bottle of water in one hand.

The guy sweetly greets Katsuki, flashing a smile so dazzling it should come with a public safety hazard. Katsuki replies with his usual grunt, trying to act aloof despite being so nervous he can feel his balls trying to crawl back into his body.

"How's it going?" His neighbor asks, taking off his headphones and giving Katsuki his undivided attention. He always does this whenever they're alone, always trying to engage Katsuki, completely oblivious of his effect on the blond.

"All good," Katsuki replies tersely, trying hard not to embarrass himself again before he could make his moves. "Just came back from work."

"Ah, me too! It was pretty hot out today, wasn't it?"

It was, and Katsuki could see how much the other guy was sweating under his clothes.

Now, Katsuki usually hates body odor but this guy. Holy shit, his sweaty musk smells /divine/. He doesn't find it disgusting at all—in fact, Katsuki wouldn't mind just pressing his face right into Deku's armpit and staying there for the rest of his life.

(Guess that's another thing to add to the ever-growing list of kinks he hopes to try with the nerd.)

Katsuki's so distracted by the scent that he misses out on most of what the guy was saying. "...can't wait to get home and eat the ice cream I've been saving!"

Then he pauses, giving Katsuki a strangely bashful look before softly adding. "I, er, have a whole gallon of Rocky Road in my freezer, by the way. There's enough for two."

The implication isn’t lost on Katsuki. His heart speeds up as he looks at the nerd’s smiling face, so handsome, so hopeful.

Katsuki’s chance is right there, offered up to him on a silver platter. Maybe he can get what he wants without going through with Mina’s ridiculous plan.

Maybe he can get through this with his dignity intact. He just needs to accept the nerd’s offer.

So he opens his mouth and says:

"I fucking hate Rocky Road."

God. Fucking. Damn it!

The smile drops from the nerd's face and Katsuki seriously considers punching himself in the dick.

"Oh. Okay." His neighbor looks away and when he moves to put on his headphones again, Katsuki panics and hits the emergency button.

The elevator abruptly stops.

"Hey, why did you—"

/It's now or never!/

Katsuki rips the cap off the bottle and pours the contents all over his white shirt.

"Oh no," he announces, inwardly cringing at his terrible acting. "I accidentally spilled my water."

The nerd stares at him, bewildered.

"Huh?"

"Now I have to remove my shirt," Katsuki continues, already committed to the script Mina wrote for him. "How annoying."

The nerd makes a choking sound when Katsuki pulls his wet shirt off.

His face turned beet red as he watched Katsuki who was not-so-subtly flexing and stretching, not-so-subtly showing off the toned planes of his shoulders and abs, and the pleasant bulge of his biceps and triceps.

"U-Um.." The nerd tries to say, looking panicked but also aroused.

His reaction emboldens Katsuki, whose confidence returns with the vengeance of a damned soul from hell. It prompts him to step closer, pressing forward until he has his prey cornered against the elevator wall, barely a foot of space between them.

The nerd's breathing heavily now, his hands holding the straps of his dorky yellow backpack in a white-knuckled grip. His pupils are blown wide, the emerald glean of his eyes clouding over with lust.

Katsuki is no stranger to the signs of attraction, he sees them in all the extras who flirted with in bars.

But seeing those same signs on the man who’s been the guest star of his wet dreams in the past two months made the simmering heat in Katsuki's gut boil over and ignite.

He gives the nerd time to take him in, watching those green eyes flick down the line of his body, spending an inordinate amount of time on his chest before skimming over the tight crests and troughs of his abs.

Then Katsuki sees his gaze move further south, following the happy trail of blond hair until it disappears below the waistline of his gray sweatpants.

Which, by the way, got pretty soaked too and now left /nothing/ to the imagination.

(Katsuki may or may not have made the executive decision to go commando that morning.)

The nerd swallows harshly, his pink tongue darting out and swiping over his bottom lip.

Fuck, Katsuki wants that tongue in him so bad. He doesn't even care which hole it goes into, he just wants to feel that wriggling wetness unraveling him from the inside.

"Hey," he husks, smirking when the other man visibly jolts at the sound of his voice. "You got anything to help wipe this down?" He points at his glistening pecs.

"No—I-I mean, yes!" The nerd blubbers, hurriedly removing his backpack to search inside.

But as soon as the bag slips off his shoulders, Katsuki pushes him back to the wall, pressing his naked torso flush against his.

“I think I have what I need right here.”

The nerd reacts, both hands grabbing Katsuki's shoulders.

For one terrifying second, Katsuki thought the nerd would shove him away, but then his fingers moved down to Katsuki's arms, stroking his biceps, his touch featherlight and almost reverent before settling on Katsuki's hips.

He squeezes them gently.

Katsuki's heart leaps.

For a moment, no one moves. Katsuki holds his breath, scared to even breathe.

Then the nerd dips his head down lightning quick and captures Katsuki's lips into a kiss.

It ends as quickly as it begins. The nerd pulls back, smiling shyly as Katsuki stares at him in disbelief.

“Sorry,” The nerd whispers. “I've been wanting to do that since we first met."

That’s enough to snap Katsuki out of his daze. He grabs his collar and pulls him into another kiss.

This one's rough, hungry. The blessed tongue that Katsuki's been craving easily slips into his gasping mouth, sliding against his own with maddening friction.

Every move, every groan he draws out of the nerd feels like a victory. Inch by inch, he's winning ground.

"Name," the nerd moans into his mouth. He wraps a hand around Katsuki's throat, gently forcing Katsuki to look at him. "Tell me your name."

Katsuki can't respond, the pressure on his neck is making black dots dance across his vision as his brain is delightfully deprived of air.

"K-Ka...Ka," he tries to say.

"Kacchan?" The nerd asks, somehow amused by his struggles. The dark timbre of his chuckle almost made Katsuki cum in his pants.

"Katsuki," he finally answers, gasping.

The nerd's expression softens into an adoring smile and the hand around his throat loosens. "I think Kacchan suits you better," he croons, the cadence of his voice so sweet that Katsuki might just melt into a puddle of blond goo right there.

"I'm Izuku. Nice to meet you."

"Izuku," Katsuki repeats slowly, still stupid from the lack of air. He doesn't get any time to recover though as Izuku flips their positions and pins Katsuki against the elevator wall, hands sliding from his hips to his ass and lifting him up.

It catches Katsuki by surprise, his limbs flailing to find purchase. One of his feet accidentally hits the emergency button and the elevator starts to move again, but Katsuki couldn't care less.

He's too busy holding on for dear life as Izuku moves down his neck +

leaving a wake of bruises on the pale skin.

Then Izuku takes one of Katsuki’s nipples into his mouth, making him gasp, his back instinctively arching to give the nerd more access. Izuku is rough, sucking and biting, relentlessly claiming the landscape of Katsuki's chest.

Katsuki is painfully hard, his cock dripping and straining against the scratchy fabric of his sweats. It becomes a thousand times worse when Izuku catches on to his "situation" and starts rutting his own hardness against him.

Fuck, he feels so big. He's gonna tear Katsuki apart.

The elevator fills up with their pants and moans as the pressure between them builds and builds and builds.

Until finally, Katsuki's body seizes, his mouth falling open in a muted scream when his orgasm strikes him like a lightning bolt, setting his nerve endings on fire.

And while Katsuki’s still reeling from the force of his orgasm, Izuku chases after his release, hips frantically bucking into him. He bites hard on Katsuki's shoulder when he finally cums, his body locking against his.

Izuku keeps Katsuki pinned against the wall, leaning on him, his flushed face tucked in the crook of Katsuki's neck. Katsuki could feel his hot breath against his skin, and the rapid beating of his heart.

One of his hands card through Izuku's curls, lazily scratching his scalp.

Izuku hums in approval.

They both stay that way for a while, seconds feeling like hours as they ride out the tides of pleasure still pushing and pulsing through them. Katsuki can't help but notice how well they fit together, every gap sealed, no wasted space between them.

The elevator door dings open, making Izuku finally look up. He glances at the number on the panel, frowning slightly.

"This is our floor," he says, and the disappointment in his voice is clear as day.

"Yup."

"We have to go now," Izuku adds.

"Yeah."

Neither of them move.

The elevator doors begin to close and Izuku stops them with his foot. Their panels slide back open, while the number on the panel starts to blink in warning.

"We really need to get out before someone complains," Izuku chuckles half-heartedly as he finally puts Katsuki down.

Katsuki grudgingly releases him as well, feeling suddenly cold without Izuku's warm body on him.

"Right." He clears his throat. It's getting awkward, but he doesn't flee this time, determined to see Mina's plan through. So he holds the door open while Izuku retrieves his bag.

They both step out of the elevator but neither go anywhere, merely loitering in front of the closed metal doors.

Izuku fiddles with the straps of his backpack, rocking back and forth on his heels.

"Thank you, Kacchan," Izuku says, smiling now with a soft, boyish charm that's worlds away from the man who had just choked him and left a throbbing bite mark on his shoulder.

The dichotomy of his existence is intoxicating.

Katsuki wants to see more of it.

"What are you thanking me for, shitty nerd?" He smirks, turning around so that Izuku would see his back. “We ain’t done.”

When Mina first offered to draw the henna tattoo on him, it had been mortifying.

It felt incredibly cheap and cheesy at first, and he nearly scrubbed it off several times in embarrassment.

Even now, he’s still has reservations about it as he waits for Izuku reaction.

A sharp gasp makes him flinch.

"Is that...?"

Katsuki cautiously peeks over his shoulder and sees Izuku's green eyes zeroed in on his lower back. Half of him had expected the other man to treat his tattoo as a joke, but Izuku isn't laughing.

Instead, the look on his face sends an unexpected thrill down Katsuki's spine.

Desire. Plain and pure. It's a look Katsuki should be used to by now, except Izuku's desire is nothing like what he had seen from his past hook-ups at all.

Izuku, he... he looks like he wants to swallow Katsuki whole

His desire is a black hole—bottomless, insatiable, all-consuming.

And Katsuki... Well, he's determined to fall into it or die trying.

"Well?" He taunts, trying to hide the excited tremble in his voice. “Are you just gonna stand there, shitty nerd?”

In a flash, Katsuki pressed against the nearest wall, Izuku’s body a comforting weight that he can’t get enough of. He wants Izuku on him, crushing him 24/7.

God, the nerd is bringing out all the nasty parts of him that he didn’t even know he had.

Izuku kisses him again, bruising, desperate.

"I want you," he groans into Katsuki’s mouth. "Please, Kacchan," he even adds with a flutter of his lashes, as if he wasn't endearing enough.

"Can't you read, you dumb Deku?" Katsuki chides, harshly nipping on the nerd's bottom lip.

He pulls back and cups Izuku's face between his hands. "You already know my answer."

When Izuku moves to kiss him again, Katsuki abruptly pushes him away. Izuku looks alarmed for a split second, but he instantly relaxes when Katsuki grabs his hand.

"Come on, nerd," Katsuki commands, blushing a little when Izuku interlaces their fingers together, a ridiculously dopey smile on his face. "We've got lots to do tonight."

Tonight, tomorrow, and for the rest of their lives. Hopefully.

"Okay, Kacchan!"

On the way to his apartment, Izuku's eyes never leaves Katsuki’s back. He can feel that heated gaze on him, prickling his skin.

The resounding success of his plan almost makes him giggle. Part of him still can't believe something so ridiculous actually worked.

He makes a mental note to buy a thank-you gift for Mina. And maybe he'll turn the tattoo into a permanent one some day.

For now, those henna-inked block letters at the base of his spine already did a fantastic job of saying what his mouth can't say:

"I'M YOURS, SHITTY NERD"

But his favorite part of it is, unquestionably, the thick arrow drawn under it, which went down Katsuki’s ass-crack and pointed directly at his asshole.

The message ain't gonna get clearer than that.

[END]

It’s been a while since I wrote purely indulgent nsfw, so I hope this isn’t too bad.😅 Inspired by this Tiktok I saw of a dude who threw water over his shirt so he’ll have an excuse to remove it and flaunt his pecs. Thought it was a very Bkg thing to do. 😆

Tips, QRTs, replies are all welcome and very appreciated!

Thank you for your support last 2022, and I hope you'll stick around for what I have in store this 2023!😊

ko-fi.com/jaeprince