Koukishin ga watashi o korosu

Driven by curiosity, Aito sets out to find the culprit. One day after school, with the school festival only two days away. Aito Izumori, a member of the Literature Club, discovers the corpse of a female teacher on the rooftop of the club building. Aito tries to contact the police, but realizes that the entire club building is a giant locked room. …Is the culprit still inside this building? Driven by curiosity, Aito Izumori sets out to find the culprit.