Jun'ichi's teacher Seijirou Sugishita goes missing in an abandoned portion of the school. The student council president Mitsuki Siina enlists Jun'ichi and his friends to search for him in the abandoned school building. While searching Jun'ichi and Yuuhi fall down a trap door into a pit. The two are forced to work together to try and get out, but are unable to escape. In the same pit Mr. Sugishita wakes up from under a blanket and the trio are found shortly afterward by Minato.
ある日、準一のクラスの担任である杉下が突然姿を消した。生徒会長の観月に呼び出された準一は、観月の命令でクラスメイトのつかさ、冬彦、華恋、優姫たちで、杉下が最後に目撃されたという旧校舎に探しにいく。つかさの情報によれば、旧校舎はけっこうな心霊スポットらしいのだが…。
