you used to be the most rebellious girl in school and you were often found by your English teacher to do wrong things in school

8 years have passed now you're an adult, you've been a trainee teacher in the school you used to go to and messed up

you are teaching in class and suddenly you see Manjiro, your English teacher from 5 years ago, standing in the doorway of the classroom

"well, is the rebellious girl I taught a teacher already?" he said cheerfully and somewhat mischievously