Ushinawareta Mirai wo Motomete

At the start of the 21st century, a school in the Uchihama area is undergoing rapid expansion. As a new building is set to replace the old one, students prepare for the final General Club Festival to be held at the aging structure. Sou Akiyama, a member of the Astronomy Club, finds himself in a club composed of prominent students on campus. On October 1, the club is asked by the student executive committee to help ease growing student anxiety. Reports of ghost sightings, accidents, and unexplained cases of sleepiness have emerged in the old building. When Yui Furukawa, a recently transferred student known for her quiet demeanor, appears to Sou, a series of events begins to unfold.