Yoru, Tomosu

Kagurahara Jogakuen, a girls' school founded in the Taisho era, carries a dark history. Generations ago, students practiced secret "Pseudo Sister" contracts — exchanging their most prized possessions and pledging sisterhood until graduation. Two girls who signed such a contract later committed double suicide. The teachers called it an accident. In the present day, five students at the school begin experiencing strange incidents. Then a transfer student named Yuuka joins the koto music club, insults the performance, and leaves a note for the club president asking to meet at the old school building. The president is later found dead, fallen from the second floor. A horror mystery visual novel.