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.
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.
Kyoko Yoshine ,Takumi Kitamura ,Haruka Michii
Eiko Tsunado
Ajiado ,
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as Aya Chiyono (voice)
as Mamoru Suzuhara (voice)
as Saki Akutsu (voice)
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