Yamada naoto, a skilled member of a renowned yakuza family known as Tachimagumi was entrusted by his boss to take care of his daughter Tachima kanade who has big attitude, they began to live in a certain countryside since the all out war between Tachimagumi and the arch rival family of a Tachimagumi, Yuzurigumi has began but kanade has been troubled ever since they fled from her mansion, she started her school as a 1st year in middle school but what awaits her there was something even yamada didn't expected. The daughter of the arch rival family of Tachimagumi is also enrolled in the same school where kanade is enrolled, her name is Yuzuri Kyoko...