Omegas are free use - any Alpha can fuck any unclaimed Omega they want whenever they want. Katsuki has no problem using Omegas but swears he'll never touch Deku...until he gets hit hard with an itch that only a tight Omega hole can scratch and Deku is the only one around for

miles so he bites the bullet, gives up a little bit of his pride and slams Deku up against a nearby wall, yanks down his pants and shoves his cock deep into his hole.
It's better than any other Omega he's ever fucked. He cums multiple times, filling Deku up until there's jizz

streaming down his trembling thighs. The sounds Deku makes, the way he innocently shakes his hips and trembles, how many times Katsuki is able to make him cum - it's unlike anything he's ever experienced. He's hooked...and infuriated. He walks away from Deku with a fire still

raging in his belly and his cock aching to be buried back inside that sweet, hot hole. He swears to himself that it was just a one time thing done out of desperation. No matter what, he is never touching Deku again.
And he holds true to the promise to himself...until he sees

another Alpha moving in on Deku later that day. Red rage blurs his vision. He tries to tell himself that Deku is free use, any Alpha can touch him. Why does he care? He doesn't...but when that fucking Alpha starts pulling Deku in close, he's moving before he knows it, ripping

Deku out of his arms. There's no fight, no struggle - one look at his enraged expression is enough to send the Alpha running off with his tail between his legs. Katsuki is quick to wrench Deku into the nearest secluded location and fuck him until the nerd can't stand properly.

Deku's the one Omega he said he'd never touch but now that he's been given a taste, he can't get enough. No matter how many times he cums, his cock won't soften. He wants more...all of him, every single inch!
The incoming of curfew is what finally prompts Katsuki to stop,

though he's nowhere near satisfied. He slips out of Deku's sloppy hole, still hard and needy but a lot more comfortable with that than last time. Deku collapses to the ground, shaking and panting. Katsuki stares at him for a few silent moments. He's never been a one Omega kind of

Alpha - why bother? He'd only get bored and have to deal with a whiny, sniveling Omega to deal with when he moved onto his next piece of meat. But...Katsuki blows out a slow breath. He grabs a handful of Deku's hair, wrenching his head back. Lunging down, he chomps down hard on

the side of Deku's neck. His teeth easily break through the soft, warm skin. Blood bursts across his lips. Deku lets out a loud, shrill squeal and cums, bucking his hips raggedly as his small, spasming penis pumps out a pathetic excuse for a load. Straightening back up, licking

Deku's blood from his lips, Katsuki can't hold back a wide grin. Fuck...fuck...he'd been told that claiming Omegas was an ecstasy all in itself but...he never thought it'd feel this stupidly good. That was his mark on Deku...no one else could touch him now. No one else could have

him. Deku was all his...The thought sent an electric trill straight down to his painfully hard cock. Wiping the rest of Deku's blood from his mouth, Katsuki grabbed his arm, hauling him to his feet. Big, teary eyes stared meekly up at him. That face...that fucking face...

he wanted to mess it up...he wanted to mess up all of him! Still grinning, Katsuki began dragging him towards the dorms. He said he'd never touch Deku but now it was obvious: there might be other Omegas but the fucking best hole in existence was right here...and he was his now

idk, I was thinking about Alpha Katsuki fucking Omega Deku out of necessity or boredom and being like '...well, shit'

anyway, that's the end, friends!