Rei attended an alumni gathering with his elementary school classmates. Among those reunited are Rei's lover, Rina, and Hajime, who was Rei's close friend. The seven former classmates suddenly realised they were trapped in a closed room and all exits of the building have been locked.
Fumiya Takahashi
Kobayashi Rei
Jin Suzuki
Ozaki Hajime
Hiroe Igeta
Yoshimura Rina
Yuno Ohara
Honda Asuka
Jiei Wakabayashi
Wakaba Hiroto
Tsuyoshi Furukawa
Kamei Yuma
Ryubi Miyase
Nakamura Kaoru
