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.

After her stunning defeat at the hands of Ayabe from the Student Council, Mafuyu is determined to know her enemy. But instead of getting the inside scoop on how to bring him down, Mafuyu finds herself making a new friend. When it becomes clear that her new friend has family issues, Mafuyu vows to help him out...even if it takes extreme force!