Yakuza-sensei

Kageyama Kousuke is asked by his brother the principal of the school to teach an unruly class. Kousuke is a part of the Yakuza, the school he teaches is at is own by his yakuza syndicate. After putting a student rightfully in their place, the student Hasegawa Yuma falls for Kousuke's handsome face. Yuma is in love with his teacher but Kousuke won't accept any love due to his past trauma.