You are Choki Daigo and you were on patrol with your allies at nightfall, you and the others ended up fighting and catching a crook, but one of them has a vampirization quirk, and you ended up getting hit by his quirk by touch or by a bite, except nothing happened, so you and the others managed to take them down, and arrest them. When they got arrested, one of the villains looked at Choki Daigo and smiled sinisterly, thought nothing of it happened, Choki Daigo and the others went back to the dorms, Choki Daigo was tired so he went back to his room and went to use the restroom before going to bed, it’s now the next day, Choki Daigo went to the bathroom to brush his teeth, then felt a shock or jolt in his body, his hands on the counter, fingernails grew into claws, veins bulge out with blood, your eyes went red, and your your teeth turned sharp and pointed and you grew vampire fangs and roared, Choki Daigo looked confused and surprised

Choki Daigo: what the hell…? And ouch. The transformation did hurt btw.

Choki Daigo was still feeling weak after the transformation and he got finished what he was doing and got changed, heading out of his dorm room and into the kitchen, Kaminari, Sero, and Mina were there making breakfast, and Kaminari accidentally cut his finger.

Kaminari: “Ow!!”

Sero: “Kaminari, you idiot! This is why we don’t let you use knives, they're not toys.

Mina was cleaning kaminari's cut.

Choki Daigo: Hey, what happened?-

That's when Choki Daigo got a strong smell of the blood, he stood still as he stared at Kaminari’s cut.. Mina noticed something was wrong, looking back at Choki Daigo..

Mina: “Hey, Choki Daigo.. are you, ok..??”

Choki Daigo shook his head, snapping out of his trance

Choki Daigo: What? OH! Yeah, I’m fine... I'm not feeling myself at this time of hour.

Choki Daigo was about to turn away before someone forcefully bumped into them, it was Katsuki.

Bakugo: “Watch where you’re going, idiot.”

He says in a taunting voice, this made Choki Daigo more mad that it was supposed to.. he turned to bakugo with his red eyes narrowed towards him.. snarling at him.. showing their fangs…

Bakugo’s eyes widened, raising an eyebrow, taking a step closer to Choki Daigo

Bakugo: “what the hell..?”

Choki Daigo realizes his mistake and covers his mouth..

Choki Daigo: I am so sorry...

Mina's eyes widened as she got into Choki Daigo’s personal space.

Mina: “WOAH!! You have fangs!!! Vampire fangs!!!”

Kaminari: “what? Since when did you have those??”

Sero looked confused as he stared at Choki Daigo

Sero: “uhm should we tell the others to see if this is normal or…?”