In Search of the Lost Future

失われた未来を求めて

Sou Akiyama and the Astronomy Club at Uchihama Academy are building a planetarium for the school's final festival before the old building closes. With childhood friend Kaori Sasaki and club president Airi Hasekura at his side, Sou is asked to calm rumors of strange incidents in the old wing. Things tilt when Yui Furukawa, a girl who transfers in late, appears before him and the club's ordinary preparations start to come apart.