Natsuo Katsuragi is a 23-year-old office worker who graduated from a junior college of fine arts and works in the interior showroom of a major trading company. Her idea of the ideal woman's life is that of Kuniko Kase, an interior coordinator who works three times a week on a contract basis and is also a housewife. However, Natsuo, who is having an affair with the head of a design office, design engineer Soji Kirimura, is far from such a way of life and is tired of fruitless love. One day, Natsuo calls Kirimura to hear his voice, but it is his wife who answers...