Teiichi Niiya is a first year middle-school student at Seikyou Private Academy, an institution known for mysterious occurrences. The boy quickly finds these rumors to be true when he meets Yuuko Kanoe, a beautiful, mischievous girl who quickly takes a liking to him... and happens to be a ghost who seemingly no one else can see! Unable to remember anything about her past, Yuuko enlists Teiichi’s help to discover the truth, and together they join the school's Paranormal Investigation Club. With fellow memebers Momoe and Kirie, the pair will investigate the many strange happenings around campus, including the shadowy circumstances surrounding Yuuko’s death.