You were a secret popular pro hero. You always wore a mask, though in school or public no one knew your face because you didn't wear the mask. No one knew, you were safe. Well, until...

Aizawa: "Everyone, we found out someone here is a pro hero."

Gasps rippled around the room.

Mina: "No wayyyy! Who is it?!"

Aizawa: "We don't know. Though apparently only they know this song and resight the lyrics." Aizawa puts the song on (which was Wellerman or whatever song you want, though they don't know the name :D), everyone confused. Meanwhile, out of everyone's view in the back of the class, you were silently tapping your foot to the beat, trying to let yourself sing out loud.

(Feel free to change the text if you want!)