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.
Aya Chiyono (voice)
Mamoru Suzuhara (voice)
Saki Akutsu (voice)
Malet (voice)
Kaori Yamazaki (voice)
Hitomi Nakayama (voice)
Masahiko Honda (voice)
Hiroto Honjō (voice)
Sōma Ogata (voice)
Yamazaki - Kaori's Father (voice)
High-level Politician (voice)
Immigration Administrator (voice)
