Vampire! Katsuki.

Bkdk

[NSFW]

CW: underage sexual feelings(?), underage (middle school/highschool),

It happened first when they were young. Izuku had fallen and cut his leg open, Katsuki's red eyes focused on the red pouring from the gash.

Izuku was frantic, tears pouring from his eyes.

"Thats a lot of blood, Kacchan! Am I going to die?" The boy cried out. Katsuki panicked.

"I can fix it." He'd said, rushing over and dropping to his knees in front of the cut.

"Close your eyes."

Izuku did as told, closing his eyes as tears formed and fell from them. In a moment, his body felt amazing, something stirring deep inside of him. Izuku gasped, eyes

opening to look down at Katsuki.

The blond had been licking up and down his cut, drinking up his blood and leaving skin that healed much too quickly underneath.

"K-kacchan." Izuku's voice wobbled, legs shaking in pleasure, "What did you do?"

Katsuki's cheeks heated up, but he

stood proudly, "I fixed you. Call it a quirk of sorts."

"That's amazing! Kacchan has two quirks? I can't wait till I get mine!"

"Shhh! You can't tell anyone about this one, Izuku."

"Huh? But why?" Izuku asked.

"Promise." Katsuki demanded. Izuku nodded his head and they didn't

talk about that day again, until middle school.

Izuku was walking home when he heard someone coughing up a fit. He ran towards the sound, finding Katsuki hunched over, coughing out blood. Bright glowing red eyes met his, angry.

"Are you okay?" Izuku asked, rushing forward.

"Deku..!" The blond launched up, tackling Izuku to the floor, pulling his hair roughly to the side to expose his neck before clamping down on the soft skin.

"Kacchan!?" Izuku's eyes widened. He gasped as his body was suddenly hit with a wave of arousal. His mind flooded with

darkness, hips bucking up into Kacchans. Katsuki pushed his hips back against Izuku's, holding them down to the ground so he couldn’t force anymore friction between them.

Izuku whined, body trying to get release.

Just as quick as it'd started, everything ended.

Katsuki crawled

off him, licking his lips and glaring down at him.

"Huh..?" Izuku slowly sat up, trying to make sense of what just happened.

"Shitty nerd."

Izuku lifted his hand to his neck, feeling nothing but Kacchan's saliva and his own fresh skin.

"What just- are you okay?" Izuku's head

span, unable to come to a conclusion on what had come over them just now.

"Get away from me." Katsuki hissed.

"But Kacchan-!"

"Stop always following after me!" Katsuki yelled, turning to run away.

He didn't make it very far before he fell over coughing again.

"Kacchan!"

Katsuki hissed under his breath as Izuku kneeled beside him.

"Don’t."

"What's wrong? Do you need an ambulance?" Izuku asked frantically.

"No! Shit.. if you want to help, close your eyes and don't say a word."

"But-"

"Just do it!" Katsuki snapped. Izuku quickly shut his eyes

tightly. In seconds his worried brain became mush, as pleasant feelings flowed through him once more. His eyebrows furrowed in confusion but he felt too good to care why he was confused in the first place.

Izuku moaned softly, feeling his cock twitch. He could feel Kacchan

against him, body burning hot. Hands on his sides, chest against Izuku's back, mouth on his neck.

"Kacchan.." Izuku whined, melting into his touch. That earned him a smack to his arm. Izuku didn't care though, wishing he could dissolve fully into this feeling.

He felt a

familiar build in his groin, hips thrusting into the air as he came in his uniform.

"Stupid slut." Katsuki snickered, pushing Izuku away and panting heavily.

"Kacchan.. What was that?" Izuku asked.

Katsuki looked at him and sighed in annoyance, "I'm only telling you cause I

know you can't keep your big mouth shut."

"I have a secondary genetic quirk. It's called Vampirism. I can basically heal wounds with my saliva. But only if I drink from them. And I have to drink blood every week or so, or I get like.. that." Katsuki explained with a grumble.

"But-"

"My saliva also has an arousing effect." Katsuki admitted, "So don't worry, I know you didn't cum in your pants on purpose."

The blond smirked, "Pretty fucking pathetic though."

Izuku blushed wildly, covering his wet crotch with his hands.

"So you need to drink, you

haven't been? Kacchan you need to take better care of yourself!" Izuku scolded, "What if I hadn't come along?"

"That's what you're mad about?" Katsuki growled, "I didn't want this you know! It's your fault!"

"What?" Izuku asked.

"Shut up! Just stay away from me."

With that,

Katsuki stomped off.

Izuku did his best to get on with the year, but he couldn't help but steal glances at Kacchan during class.

That lasted a month. Izuku saw Katsuki dozing off in class (something that never happened) and confronted him about it afterwards.

"You haven't been

eating again!" Izuku accused.

"Fuck you!"

"You need to eat, here." Izuku pulled the collar of his shirt to the side, exposing his neck for him.

Katsuki's eyes stayed transfixed to the bare skin as he spoke, "You know what happens though."

Izuku flushed brightly, "I know. But

you need to eat."

Katsuki raised a quizzical brow before slowly walking towards the bathroom.

"This is the last time." Katsuki said sternly.

"Make sure you're eating properly." Izuku nodded.

He pinned Deku against the wall, the boy turned his head to the side, closing his

eyes again. Katsuki bit down, piercing through the skin to draw out Izuku's blood.

Izuku shuttered, body feeling like it was floating. He tried to stay strong against the arousing affects of Kacchans saliva, but his mind had trouble not drifting to their closeness, to how he was

pressed into his body. His hips twitched, surprisingly, Katsuki's grinded back against him. Izuku moaned softly as they grinded against one another, breath quickening. Katsuki groaned against his neck, pushing Deku harder against the wall.

Izuku whined as he came himself again.

But this time, Katsuki grunted as he also came.

"K-kacchan you.."

"I can feel your arousal too." Katsuki hissed, "You're a sensitive little bitch."

"Sorry." Izuku mumbled, looking down.

Katsuki rolled his eyes, grabbing himself some paper towels to clean himself up.

Two more

weeks passed before Katsuki came to Izuku's house.

"Katsuki! Lovely to see you again, Izuku's in his room. I’ll make some snacks." Inko greeted him. Katsuki invited himself into Izuku's room.

"I need your blood."

Izuku offered his neck without question, letting Kacchan feed.

He learned not to question Kacchan afterwards, and it quickly became a weekly routine for them.

"Kacchan, why do you always choose me?" Izuku asked one time, cleaning himself up after Kacchan had drank.

"Do you remember when we were kids?" Katsuki asked. Izuku didn't need to be

reminded of the situation he was talking about. He gave a firm nod.

"The vampire quirk doesn't activate until you drink someone's blood. After that, you're bonded to their blood. You can drink other blood, but it only does so much. This got activated because of you, now I need

your blood now. At least once a week, preferably twice."

"Because of me..." Izuku frowned, "What does that mean? To be bonded?"

Katsuki scowled, "I literally can't live without you. Your delicate quirkless ass is my main source of energy now. You owe me your life since I gave

you mine."

(TBC)

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