Mafuyu is the no-nonsense, take-charge and hard-hitting leader of her high school gang. But when she gets expelled for being a delinquent, her mother, fed up with her daughter's wayward ways, sends Mafuyu to an isolated school far off in the country.

Yui might be a spy for the Student Council, but he still takes his duties as a member of the Public Morals Club very seriously! When he notices that the club has been a little stagnant lately, he decides to liven things up with some ninja training. But while he's whipping Mafuyu and Hayasaka into shape, forces on the Student Council are working against him...