Niija Teiichi, a freshman, discovers a haunted school building where he encounters a ghost. He helps the ghost investigate her mysterious death.

An old school building rumoured to be haunted is the place where a young woman was left to die. A freshman at the school, Niija Teiichi, stumbles upon the ghost of this woman and seems to be the only one that can see her. She can't remember the events that led up to her death and hence Niija decides to help her in discovering the cause.—Mattias1

Legends surround everything, especially old school buildings. The Private Seikyou Academy is not an exception. It is rumored in the said school that sixty years ago, there was a girl that was left to die in the old building. Dusk Maiden of Amnesia focuses on Teiichi Niiya, who, for some reason, is able to see the girl's phantom. Now he is, perhaps, the only person to reveal the mystery of Kanoe Yuuko's death.—Scientiiaa