Ranmaru Fujii, a beautiful housewife entering her fourth year of marriage, constantly strives for perfection. Her house is spotless, her meals perfectly balanced in nutrition. During her husband's absence, she invites a visiting massage therapist for treatment. Though he is not her type at first glance, his skill and unexpected compatibility draw her in, leading her to fall into an affair, succumbing to illicit pleasure in the daytime solitude of her own home.