Suzu Aiba... a third-year high school student. After her summer research project, she's retiring and preparing for university entrance exams. She's always been fascinated by the occult, and her current club activities revolve around uncovering the causes of paranormal phenomena. As the president of the Occult Research Club, Suzu constantly delves into the study of spirits and strange occurrences. Lately, however, she's been plagued by a peculiar phenomenon: being sexually assaulted by a ghost during class. Determined to solve this mystery, Suzu embarks on her own investigation. And in a daring move, she decides to shed her uniform, hoping to lure the ghost closer... .