The usual school train. Suddenly, a man whose identity is unknown molests her buttocks, making her a target of perversion!! The acts of perversion do not end after just one time!! Unfortunate girls, including Aina Hoshina, Aoi Kuraki, Nao Jinguji, Azusa Misaki, Akari Mitani, and Satori Fujinami, are grabbed by the buttocks from behind without showing their faces, and are forcibly inserted and ejaculated inside their vaginas. Not only in the train, but also in the back, the acts continue until they are bored, and they even increase the number of rapists, expanding the circle!! Enjoy all six popular works at once!!