Dusk Maiden of Amnesia Complete Collection

Many places have a skeleton in their closets, but Seikyou Academy has something worse:  the ghost of a young woman left to die in the abandoned building behind the school. Unsurprisingly, one of Seikyou's many clubs is for students interested in "paranormal investigations," but what is shocking is that this club’s founder club  is the ghost herself, Yuko, who, unable to remember how she died, is trapped behind life and death… until Teiichi Niiya, a freshman who can inexplicably see her, arrives.  Can they unlock the secret of Yuko’s death and free her?  Or will the truth unleash something even more horrifying in Dusk Maiden of Amnesia!