Odaka Youichirou is a number one problem child, and a violent delinquent. However, he also uses his skill with violence to solve problems at school, such as a girl's problem with a stalker or an issue with peeping tom pictures. However, he has now involved a new teacher, Tsukimoto-Sensei, in his activities.

Yuuma is summoned back to his home island after the death of his mother and asked to become the next head of the wealthy Nuenaki family. He has certain misgivings though and rejects the offer. However after the current head dies not a day after his arrival, he has no choice but to become involved.

(Source: MU)