"Get in the fucking closet. I'm gonna suck your dick." Katsuki commands, all confidence.
Shouto whips his head around to make sure no one hears anything and levels Katsuki with a look. "You have lost your mind. You work here, Katsuki. What if we get caught!?"
"Fuckin' hell, Half n Half. Just shut up and choke me on your fucking dick already!" Katsuki snaps, fed up with his not boyfriend and his stupid worrying. "No one is gonna walk in here so bring me your dick, or I swear to fuck I will blueball you for a month."
Said not boyfriend sighs as he steps into the small closet and closes the door.
They work at seperate agencies now, rarely having time for a quick fuck on a good day, but today of all days they somehow end up running into each other during work hours because of some robbery and something about jurisdiction issues - What the fuck ever. The point is, Katsuki caught a single glimpse of that white/red hair and got so hard in his fucking pants he had to run to the bathroom.
Shouto, because yes in Katsuki's head he was Shouto now and it was fucking gross, was talking to one of the heros handling the case from the other side of things, fucking jurisdition bullshit was dumb, and hadn't even noticed Katsuki until the blonde got his boner under control and walked up to the idiot and kicked him in the shin.
"Oi, fucker, come here." Katsuki says and turns on his heel, not even looking to see if his not boyfriend was following. Katsuki feels like an idiot but his dick is running the show right now and it sounds like the best idea ever when he snatches up the door to a small supply closet and waits for Shouto to follow him in. Shouto stands in front of the door, confusion written all over his pretty face as he sees Katsuki grinning like a mad man.
And that's how, not three minutes later, Katsuki is on his knees with Shouto's cock down his throat while they hide in a supply closet.
Katsuki is on his knees so fast Shouto has to balance himself on one of the shelves against the wall so he doesn't fall over. Katsuki is hastily pulling at the white belt and blue trousers until he can shove his face into that thick patch of mismatched pubes. Shouto is groaning above him, head thrown back while Katsuki noses along the underside of his cock.
"Fuck," He breaths, hips pushing into Katsuki's face on another low groan. "I love when you get like this, Katsuki."
Katsuki hums as he licks and sucks around Shouto's cock, pale and fat and perfect with a shiny red tip that has Katsuki absolutely salivating. He backs Shouto up until he's pressed against the wall and swallows the taller man's dick in one fluid motion. Shouto nearly chokes on a moan and Katsuki wants to grin around the dick lodged in his throat.
Shouto's long fingers grip at Katsuki's hair and tilt his face up so he can rock into the wet heat of Katsuki's throat. The only sounds in the small closet are their heavy breathing and the wet slurping sound of Shouto fucking into Katsuki's mouth with deep, slow rolls of his hips.
Katsuki pulls off and sucks on the head, making Shouto's fingers tighten in his hair. He's grinning up at Shouto while he licks at the head of the candy cane fucker's cock.
"Come on, pretty boy, fuck me up. You know you want to."
Katsuki swallows him again and Shouto snaps his hips forward, cock buried deep so deep he's gagging around it.
"Your mouth - Fuck, swallow for me, baby." Shouto groans, deep and insistent as he pulls his cock from Katsuki's throat and uses his leverage on the blonde's hair to rut against his tongue like a cock sleeve. It's rough and his jaw is starting to hurt, but Katsuki is so hard and enjoying every second as Shouto uses his mouth to get off.
"Gonna go all the way in. Want you to hold it there, can you do that?" Shouto sounds so fucked out and it has Katsuki moaning as he nods, one hand braced against Shouto's leg and the other shoved down the front of his pants to grip his own cock.
Shouto tilts Katsuki's head back and slaps the head of his cock against Katsuki's tongue. It's so fucking loud in the small room and Katsuki's dick throbs in his hand.
"God, you look so good like this. If they only knew Ground Zero was a fucking cock whore. They'd all be lining up to fuck this filthy mouth." Shouto has the nastiest mouth when he's turned on and Katsuki fuckin loves it. He's so pretty, so calm and put together on the outside, but in reality he's fucking disgusting, especially when Katsuki is on his knees.
Shouto tightens his grip in Katsuki's hair and uses that leverage to pull Katsuki on and off his cock like a damn fleshlight. He pulls Katsuki all the way off, spit coating his red, full lips, and sinks all the way into Katsuki's throat when he pushes back in.
"Shit, Katsuki." Shouto groans when Katsuki swallows around him.
His nose is planted at the base of Shouto's cock in the thick patch of mismatched pubes that drives Katsuki crazy, his lips stretched obscenely at the base of the pretty boy's cock. There are already tears in Katsuki's eyes and they begin to spill over as he gags with every little shift of Shouto's hips, the head of his cock dragging against the back of Katsuki's throat over and over.
Katsuki is getting close and he can feel how close Shouto is by the way his cock pulses and throbs as it rests in his throat. He's trying to fit his tongue against it, jaw screaming as he presses his tongue flat against Shouto's cock and sucks.
"F-fuck!" Shouto gasps. He's pulling Katsuki as close as he can, shoving all of his cock inside the blonde's mouth while he spews a string of curses that have Katsuki squeezing his cock as he strokes it. "Shit… Shit! Fuck me, I'm so close."
Katsuki grunts out a distressed sound as Shouto pulls him off his cock with a loud wet pop and thrusts right back in and doesn't stop. Katsuki has to take his hand off his dick to balance both hands on Shouto's thighs while the pretty fucker wrecks Katsuki's mouth mercilessly. He's never felt so used or so happy to be used than he does right now with drool and tears running down his face and chin. Shouto is fucking into Katsuki's mouth with desperate grunts and moans until he cant take it and Katsuki is almost ready to tap out.
"C-coming." Shouto chokes out just as he pushes in one final time and empties his fuckin' balls straight down Katsuki's throat. He's sucking it down in greedy gulps that leave Shouto shaking above him when he finally pulls out and slumps against the wall in a boneless, breathless heap.
"You're - fuck, one of these days I'm gonna die and its going to be because of your fucking mouth, Katsuki." Shouto groans.
Katsuki is grinning between gravely coughs, his throat already sore from the abuse it just took. "You're fucking welcome, you nasty shit." He grabs a stray roll of paper towels and cleans himself off as best he can before tossing them at Shouto who's still trying to piece his life together on the floor.
"Do you want me to take care of that for you?" Shouto asks, pointing to the very obvious bulge in his pants.
"Nope. Gonna ride your dick when I get home. This is my motivation to finish this stupid fucking paperwork." Shouto groans again in response and Katsuki kicks his foot out of the way so he can make it to the door.
"Put your dick away and get out the damn closet before someone finds you. I'll see you later." Katsuki is peeking around the hall as he steps out of the closet and pointedly ignores the tired, but amused "Love you too, Katsuki." before slamming the door and going back to his desk.
Shouto was not his fucking boyfriend.