"Kurumi" has moved to the apartment where Kiyohiko, an unemployed man in his forties, lives. One day, while she was out with her husband, she was entwined with a man. Kurumi gazed with gratitude and envy as Kiyohiko rescued her unreliable husband from a predicament. From the next day, Kurumi appears without a bra under her clothes, and she gradually seduces Kiyohiko.
