The founding of Seika High School, where the main story unfolds years later.
Teiichi Niiya, a student, mysteriously dies after being trapped in the underground building of Seika Academy.
Yuuko Kanoe, a female student and the ghost protagonist, dies under mysterious circumstances within the Seika Academy.
Yuuko begins haunting the school corridors and remains tied to the school grounds as a ghost.
Teiichi Niiya enrolls in Seika High in the present day, unaware of his past life and connection to Yuuko.
Teiichi encounters Yuuko's ghost and begins assisting her to recover her lost memories.
The Occult Research Club pieces together memories revealing Yuuko was murdered by her own father to prevent a scandal.
Teiichi and the club confront the dark legacy behind Yuuko's death and help her find closure.
After resolving her past, Yuuko says farewell to Teiichi and the club, ascending peacefully.
