900 years ago, Kaori, a weaving woman living in Heian-kyo, married Shiro, a shrine carpenter, but Shiro did not come back while going to work, and Kaori kept waiting even though she had gray hair, and kept her youth by sucking the blood of a young man. Kaori, who turned into a yokai and continued to live until the present day, is still living by replacing her lovers one after another and sucking their blood.