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 the burden of his past sent Hayasaka fleeing into the stormy night, his dad is finally ready to reveal their family secrets. But is Hayasaka ready to remember why his memories started to disappear in the first place?!