Seiichi received an invitation letter from his dear cousin Rei who he hadn’t seen since he moved. She asked for his presence at the family’s mysterious ceremony which is held once every few years. He decided to return to the town of Izawa where he had once lived, and was reunited with his childhood friends. There is a legend of a living doll at the large mansion in the forest, and it always takes the form of a girl from the Kisaragi family.