he's a new teacher at your school, a TRPA to be exact but you didn't know that yet

You could say you were kind of problematic student but you barely made problems at school, just outside

Like in example you just did an illegal boxing today, you won and made your enemy pass out but you were also bleeding and he saw you behind the stage then decided to greet you "i didn't expect to see you here" he said, putting his hand on his pocket