The plot begins when Takiya Genji (Shun Oguri), the son of a Yakuza boss named Takiya Hideo, enters Suzuran All-Boys High School as a transferred senior with the goal of conquering it. During the freshman orientation lecture, Yakuza arrive at the school seeking third-year senior Tamao Serizawa to avenge an injury. To show his worth, Genji fights and defeats the Yakuza, who mistake him for Tamao. One of the Yakuza, Ken Katagiri is impressed by Genji's skills. Meanwhile, Tamao greets his best friend Tokio Tatsukawa, who is discharged from a hospital, claiming that he is in good health. Tamao quietly dismisses Tokio claim and takes his bike to ensure he won't get harmed, slightly