Sato Mayumi is a housewife who has been married to Hideaki, a salesman in a home selling company, for 13 years. Her daughter is accepted into a middle school, however, the family lacks money to pay for her tuition fees. Mayumi then decides to start working again to help pay the fees. Hideaki doesn't take the family's tight budget as seriously is uncooperative about housework, which upsets Mayumi.
One day, Nasuda Ayako and her husband Taro, a teacher at the middle school, come to view a model house by a housing company where Hideaki works. Hideaki becomes attracted to Ayako.
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