3 Hours Later

The crowd had notibaly evaporated at two am, and it was just Class-1A who sat together at one table for Izuku's gift haul. Appetizers were still being served, and main courses too. Izuku rifled through the gift pile on the desk and found Katsuki's gift bag which was black and had a sticker of him on the bag. He took out the first amount of red tissue paper and snorted when he found the condoms and lubrication, placing to the side to the classes' laughter before diving deeper and finding the red box. The class well enough knew he was a supermodel and Izuku's jaw dropped when he read the gold labelling on the box. KVTSVKI's limited line. 

Izuku opened the box, revealing Katsuki's most wanted scarf. He ran his hand through the soft and warm black cashmere and on the green and orange grenade in awe.

"Thank you Kacchan" Izuku muttered, kissing him on the cheek. Izuku rifled through other gifts finding a pair of handcuffs from no other then Kaminari, another forest green sweater from Mina in woollen material and finally the newest All Might figure from Todoroki.  After a lot more bickering and laughter, Izuku called the party off as him and Katsuki walked to their bus stop and hopped on. 

They took one of the back seats of the bus, Izuku rifling through his bag for a sweater and pulling one over his head and nuzzling into Katsuki's warmth. When they got back to the dorms, they realised they were the first ones there and everyone had decided to go to the convience store on the end of the campus road.

It was just them. The lights were off, as they were well past curfew and Katsuki planned to use it well. When they entered Izuku's dorm Katsuki slowly slipped out the handcuffs he'd bagged from Kaminari and placed them on Izuku's dresser. Their shoulders brushed and a zing. Which made Izuku lose his mind. Izuku captured him on the lips and their kiss turned violent. Somewhere between, Izuku's hips grinded against Katsuki's erection and he pulled back so Izuku could wrench off both of their shirts. 

Izuku seemed so lost in him. So lost, and Katsuki took advantage clicking the handcuffs around Izuku's arms. He unbuttoned his jean shorts and pulled down Izuku's jeans leaving them both in their boxers. Katsuki's hand moved up and down Izuku's shaft through the boxers before slipping his hands and dropping it to the ground, nipping Izuku everywhere. Izuku let out a moan as Katsuki traveled lower with kisses, and carried him to the bed. Slowly, he licked the tip of Izuku's head sucking it gently as Izuku's back bowed off the bed and his cuffed hands tangled in Katsuki's blonde hair. 

Katsuki took that as approval and took him deeper down his throat, and hollowed out his cheeks. 

"Wait-ah- fuck! Kacchan, baby that feels too good-" Izuku moaned. The tingling sensation at the bottom of his back and groin was growing faster and faster, until he came undone in Katsuki's mouth and Katsuki swallowed it all. Pulling back, Katsuki grabbed the bottle of lube from Izuku's bag and took off his own boxers.

"This isn't going to work if you don't relax okay nerd?" Katsuki muttered, flicking open the lid with his fingers and squirting some onto his fingers. Izuku caught his breath again as Katsuki breached his hole with two fingers, moving in and out. His leg was lifted onto Katsuki's back and Katsuki's finger hit him just right.

"Fuuckk" Izuku moaned, his back bowing off the bed again and Katsuki took that as he was ready. He rolled on a condom and lubed himself up properly. He flipped Izuku around and slowly pushed in, past the tight ring until he was fully seated inside Izuku.

They both moaned at the same time.

"I'm going to take it slow Izuku. Tell me if you want to go faster later" Katsuki said, thrusting in and back out slowly, taking his time as if Izuku were going to die right now. Everytime he hit Izuku right, he slowed down and Izuku scratched his back with his nails.

"Faster Kacchan" he shuddered. Katsuki nipped at his ear and his thrusts got rougher, until the scratches went from slow to hard against his back and Izuku's back bowed off the bed. He was so close. Katsuki hit Izuku's prostate, at the same time he hit his and they both came at the same time as Izuku bit into his neck muffling his scream. Katsuki pulled out and disposed of his condom in the bin kissing Izuku's neck and leaving hickeys across his body.

"You okay Izuku?" Katsuki asked kissing him slowly. Izuku nodded and broke the kiss. Katsuki picked him up and carried him into Izuku's bathroom setting him on the edge of his bath-tub and filling it up with warm water and then placing Izuku in it slowly, sinking in beside him, and rubbing soap across Izuku's body. He passed Izuku's shoulders and into his upper thighs, washing him off and then resuming to his thighs pressing his hands there until the dull ache Izuku had died its most pleasurable death. He massaged his inner thighs, leaving a couple more hickeys across his neck before grabbing two towels and drying them both off. He grabbed some sweatpants from Izuku's dresser, two sweaters and shirts, tugging them onto Izuku before himself, and carried Izuku to the bedroom, turning off the light. 

He fixed the sheets with new ones and finally sunk into the bed with Izuku, pulling him close and falling asleep with utter peace.