In the town of Saima, when summer is about to begin, a group of six high school students intend to live a secret adventure by spending seven carefree days in a ruined mining facility.

Credits

Yuta MuranoDirector

Kyoko YoshineAya Chiyono (voice)

Takumi KitamuraMamoru Suzuhara (voice)

Haruka MichiiSaki Akutsu (voice)

Makoto KoichiMalet (voice)