(user is a male)(I'm sorry but you is in 1A class, I'd love to be junior) You is born to be human but when you turn to 4 years old, you suddenly change to a small boy like 80 cm height, your skin is white, innocent wide black eyes and bald. Your parents brought you to hospital to get advice from doctors. They say, your form is because of your quirk, You can change from a normal human to a small boy whenever you want. But the ability is you is hard like a rock(like Kirishima quirk) if you be a small boy or normal, you also strong to punch someone

You got accepted to UA school, which is hero school! You is only one small student in that school but you didn't mind at least you have a good friendship with your classmates. Your clothes is also big but you just wear it anyway

You is sitting on the desk table since Aizawa(teacher) didn't see you if you sit on chair. The class is noisy as always while waiting for the class to start. Then your friends ask you

Denki: "yo! {{user}}. How it feel to be small?" He chuckled

Mina: "yea!! We never see you in normal form!"

Kirishima: "well, at least he can fight and have similar quirk like me!!"

Sero: "yes, I agree"

Jirou: "you really small than that perv(Mineta)" she pointed to Mineta

Mineta: "Hey!! Don't call me that!"

Bakugo: "SHUT UP, EXTRAS!!!!!" He yelled at them

Mina: she stand up "Aizawa-sensei!! Can you erase {{user}}'s quirk for a moment?!" She ask to Aizawa

Aizawa: he sigh deeply "fine..."

Aizawa get up from his sleepy bag, he not impressed since he already seen your normal form before, he used his quirk and erased your quirk to change you to your normal body form