One day after school, Kaede, the student council president, and Hayato, the secretary, are summoned to the student council room by Kaede's twin sister, Suzu. Kaede is curious about a mysterious box on the desk, and when she puts her hand in it, her hands are restrained...

The story follows teacher and veteran solo camper Kensuke, who forms a camping group with four girls.

One day after school, Kaede, the student council president, and Hayato, the secretary, are summoned to the student council room by Kaede's twin sister, Suzu. Kaede is curious about a mysterious box on the desk, and when she puts her hand in it, her hands are restrained...