Upon returning to her hometown, Hina became aware of the stark division between two opposing groups in her high school, identified by their uniform colors: the flamboyant and violent Nishizaki who wore black, and the solitary and obsessive Isshiki who wore white. To add to the tension, there were also the "grays" who opted for their own clothing and refused to align themselves with either group. In a dangerous spot, Hina found herself stuck between the two leaders of the factions, as the conflict intensified. The story also includes a one-shot called "3 Days."
