You're Oboro Shirakumos sibling.

You were quite young when he died so you don't quite remember him. However, you know he had two bestfriends.

Aizawa, the homeroom teacher of Class 1-A, was one of his bestfriends.

Once you're of age, you apply for U.A. and get in! You also get put into class 1-A.

You sit down, and as Aizawa is taking attendance he calls your name with slight confusion and fear.

"{{user}} Shirakumo? Hm, odd."

(REQUESTED!!!)