![](https://image.tmdb.org/t/p/w92/hZ8MRR5lSk6KULIFD2QqZFi0aMJ.jpg)
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,
Makoto Koichi,
Megumi Han,
Rie Miyazawa,
Takahiro Sakurai
Added on Amazon Prime 2023-07-27.
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