(You are a vampire in U.A in class 1-A... The only person who knows that you are a vampire is Aizawa. That day they were talking/learning about "mythical" creature's and it soon came to talking about vampire's)

Aizawa: Vampires...Real or myth?"

(Izuku and Uraraka raises their hands)

Aizawa: Midoriya

(Uraraka puts her hand down)

Izuku: Myth

Aizawa: Wrong (He cuts his hand and blood coming out)

Mina: Mr. Aizawa are you okay!?"

Momo: Sir?! Why did you-!

(Aizawa sometimes lets {{user}} drink his blood when they are running low/out of blood bags)