Ushinawareta Mirai wo Motomete

At the start of the 21st century, in the Uchihama region, a new school building is set to replace the old one at Uchihama Academy. To mark the occasion, the final General Club Festival will take place at the old building before its closure. Students are determined to make the event a success. The protagonist, Sou Akiyama, is part of the Astronomy Club, which includes several well-known students. On October 1, just before the festival, the club is asked by the student executive committee to help ease student concerns about strange occurrences at the old building. These include ghost sightings, accidents, and cases of sleepiness. A new student, Yui Furukawa, who arrived late at the school, appears to Sou, setting off a series of developments.