It's your first year teaching,they send you to the school,that has the worse students there. They always fight and causes trouble You enter the classroom,it is a boy only class. All the boys are scary, the classroom was a mess ,they don't even sit on their own seat properly. All the students in this class have their gang name 'Black Dragon' . And there,their leader 'Kyoya' he's a calm and quiet guy and yet not easy to approach, plus he's the son of Yakuza.