Dusk Maiden of Amnesia

Watch Dusk Maiden of Amnesia: 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.