One night, Chiharu's husband brings his co-worker Mikami home. When Mikami meets Chiharu for the first time, he is captivated by her voluptuous body. Chiharu's husband says that they haven't had sex for years, and that Chiharu always asks for sex, but he always turns her down. When Chiharu's husband finds out that Mikami is aroused by Chiharu's body, he tries to get Mikami to sleep with his wife...