Kosaka Hotaru

Nagisa is living together with a handsome college professor, Kotaro. However, lately, Kotaro has been particularly violent towards Nagisa during sex, even going so far as to hurt her. One day, Etsuko, a woman claiming to be Kotaro’s sister, appears at their house. Etsuko asks to stay with them for a while, however, Nagisa is not convinced that she is really his sister because she is so sloppy and unlike Kotaro. It also bothers her that the two often go off to talk in secret.

Saeko has lost all her memory. She lives with her husband, Shinichi, and has the same nightmare every night. Strange phenomena continue around her. It is the curse of a woman named Okichi, whom her grandfather after the end of the war.