Teach me hell - Jeon Jungkook/ Bts FF (Mafia)

Y/N is a simple high school student, that moves towns. In her new school, there's this attractive new math teacher. He takes interested in her and would do anything for Y/N. Things like enemies and Y/N's stepmother get in their way. Jungkook has a secret he keeps from y/n and it's a dangerous one. Y/n now has to fight...