Chapter 5.

That's how Katsuki Bakugo found himself in Izuku Midoriya's room for the second time in as many days. He looked around for evidence of the previous night but found none. The nerd had completely scrubbed any trace of him being there. For some reason that really irritated him. Why did that irritate him though?

"Um, this."

Izuku was standing in front of Katsuki with a bottle of translucent and shimmery liquid in his hand. Katsuki raised an eyebrow at the object in question.

"You think I'm stupid."

"W-what? No! Of course not! I-I'll show you!"

Izuku poured a small amount of the liquid in his hand and rubbed it over what he assumed was a gash in his forehead. It stopped bleeding almost immediately. Katsuki's jaw dropped.

"You're fucking joking."

"No really! Look even from um, l-last time..."

Izuku pulled the collar of his shirt aside to show Katsuki the place where he had sank his teeth into his shoulder the previous evening. There were only a couple of faint pink marks that showed any proof of what had transpired between them.

"No way..."

"It really works so ...you can go on back. I can take it from here...heh."

Izuku tried for his most convincing smile which was probably less than convincing with blood all over his face.

"Tsk, lemme see that."

Izuku hesitated only for a moment and then placed the bottle in Katsuki's hand.

"Sit." It was a command.

Izuku sat in the only chair in his room feeling a bit self conscious. Katsuki returned with a damp cloth from Izuku's bathroom seconds later and began to wipe away the blood from Izuku's face. Sure enough the wound by his eye was already half the size it was an hour ago.

There was a split in his lip still. Katsuki dabbed at it with the cloth and Izuku flinched at the contact. Katsuki gently pulled Izuku's lip down with his thumb. He began to smooth serum at the gash with his fingers and Izuku felt his cheeks start to flush.

Why was he getting embarrassed by this?

He looked up at Katsuki who met his gaze. The flush spread to his ears and down his throat. Heat started to pool in his lower abdomen. Katsuki's fingers were still spreading the serum to the inside of Izuku's lip. Absently he wondered why it was taking so long.

Izuku spared a glance up at Kacchan again. His eyes were fixed on his. Not entirely sure what possessed him to do so, while maintaining eye contact, Izuku ran his tongue over Katsuki's fingers.

His eyes widened marginally and so quickly Izuku wasn't sure if he had imagined it.

Katsuki stood abruptly, snapping his fingers from Izuku's mouth, a trail of saliva flying from his mouth after them.

Instinctively he tried to back up but he was sitting in a chair and ended up knocking back into his desk.

"I-I'm sorry Kacchan...I don't know why..." His feeble lie died on his lips.

Katsuki moved in front of him and gripped his chin. He moved his free hand to his pants and slid them down his hips. Izuku's breath caught in his throat. Here was Kacchan's...again...! He couldn't seem to take his eyes off the sight in front of him. Izuku stared at blonde hair that started at his navel and moved down his toned belly.

"Take it." Katsuki was staring down at him, his eyes dark.

"Huh?"

"I know it's pretty but don't just stare at it. Go ahead. Grab it."

Unsure of himself or what he was doing, Izuku reached for Kacchan's...*gulp*...p-penis. Uwaahh this was embarrassing!

Absently Izuku started to stroke the semi-hard length until it was fully hard. Katsuki moved to grab something from the desk behind Izuku's head. He didn't see what it was.

"Open your mouth."

Izuku did as he was told and Katsuki slathered more serum on the inside of his lips. The liquid had a faint honey flavor that Izuku found mostly pleasant.

Then Katsuki was feeding his dick into Izuku's mouth.

"Ahmf!" He exclaimed in surprise.

"Lick it."

Katsuki's voice was husky and Izuku found he wanted to obey any command that was given to him by the muscular blonde standing over him.

Tentatively he stuck his tongue out and ran it over the tip. Izuku didn't really know what he was doing so he imagined he was eating an ice cream pop. He licked up and down the shaft, puckering his lips around the head.

"Fuck Deku, your mouth feels amazing!" Katsuki gasped out raggedly.

Izuku hummed out, pleased with the praise he received. Then Katsuki grabbed him by his hair tightly and began to push himself into Izuku's mouth, impatient with his pace. It was all Izuku could do to just keep his mouth open. He grabbed on to Kacchan's hips to brace himself. Kacchan was ramming himself down Izuku's throat causing him to gag, unused to being used this way. His eyes watered every time Katsuki hit the back of his throat. Saliva was freely leaking from his mouth down onto his lap and Izuku was starting to feel light-headed.

Katsuki was panting hotly and Izuku felt his groin come alive. Katsuki gripped Izuku's head harder, slamming into his face at a neck-breaking pace.

"Fuck. Gonna-!" Katsuki pulled himself out of Izuku's mouth and released on his face. Some had gotten in his mouth and Izuku coughed and sputtered as some of the bitter substance dribbled out of his mouth and down his chin.

"Bleh...bitter..." Izuku spit into his waste basket.

He grabbed the cloth from his desk and wiped his face. His throat and mouth felt completely bruised. He thought his jaw was going to fall off. Stupid Kacchan.

Katsuki crouched in front of Izuku and started swiping some of the serum on his cheeks.

"Sorry about that..." he muttered barely above a whisper.

Izuku was staring at his lips and that was the only reason he knew that Kacchan had spoken.

"Hey K-Kacchan...about...all of this..."

"Close your mouth." Katsuki said softly as he smoothed serum over Izuku's lips.

Before Izuku knew it, Kacchan was closing his door with a simple "See you tomorrow nerd," and just like that he was gone, leaving Izuku on the floor, his erection painfully tenting his shorts.

A/N: Yeah this is a bit trashy and it's not going to get less trashy so if you're not into this kinda thing, turn back now! You've been warned...