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.

Kanon Nonoguchi, enemy to the Public Morals Club, has been kidnapped by the Kiyama High delinquents! So of course Mafuyu and her club mates set off at once to rescue their nemesis. But even if Mafuyu and the others can help Kanon break out of the Kiyama storage shed, will she be able to escape her painful past?