Reiko, a housewife who has been married for 15 years, lives in an apartment in the city with her husband, a businessman. The house of Mr. Ikeda, who lives next door, seems to be a typical "father-and-son household"... One day, due to an unexpected turn of events, Reiko ends up going to the house of Mr. Ikeda, who lives next door, as a "substitute wife" to help with the housework. The beauty and voluptuousness of the caring and neat-loving housewife next door arouses the inappropriate feelings of both the father and son in the unattractive father-and-son household...