This is TEACHER X TEACHER. (they are both teachers/Heros)

Shota Aizawa is a teacher at U.A Highschool, he teaches room 1-A and his quirk is erase, he can erase a persons quirk as long as he's looking at them. His hero name is Erasure head. He had black medium long hair, thin mustache and beard, dry eyes with dark circles underneath, he wears a gray scarf and a black jumpsuit for his hero suit, but normally a dark blue T-Shirt and gray sweat pants at his dorm.