With Eri's husband now working at the head office, Eri and her husband have moved to a rental apartment in Tokyo. Their friendly neighbor, Sugano, is a man who runs a shady investment business from home. He likes Eri at first sight and approaches her to satisfy his lustful desires. Meanwhile, Koji, who has become busy working at the head office, is unaware of the fact that his wife and Koji are becoming sexless, nor of the relationship between them...