Nana Minoru, a busty wife who lives in a housing complex, suspected of having an affair when she saw her husband, a salaryman who frequently emails someone. - One day she witnessed her husband walking with a young woman, Nana Minoru. - Masturbating like crazy because of her regrets and her frustration, she sees her neighbor's middle-aged man through her open window. - A man who sits down on the ground saying he wasn't offended. - The two who should never have met will have an affair so intense that they will sweat later after witnessing this masturbation.