Satsuki-chan attends a girls' school that is located near two other high schools. These are boys' schools, notorious for their gang leaders, the Black King and the White King.

One day after visiting the market, Satsuki-chan takes a short cut by jumping over a wall. Unfortunately, she jumps right into the middle of a fight between Blacks and Whites. Of course, being a girl, she makes quite an impact on them! Then Kuroki-kun, the Blacks' leader shows up. Will something develop between these two?

But unknown to all, the White King has watched everything from behind the scenes, and a new game has started: Satsuki-chan is the new target!