Mizuki, a wife whose sex life with her husband is not going well, goes to her best friend Konomi, who lives next door, for advice in an effort to release her sexual frustration. However, when she witnesses her flirting with her younger husband, Satoshi, she becomes even more frustrated. One day, as Satoshi hangs out the laundry on the neighboring balcony, Mizuki becomes aroused by his strong body and seduces him by showing him how she masturbates violently. Satoshi is excited by his lewd appearance, which is different from his wife's, and wants to see his lewd behavior again, so he starts hanging out on the balcony whenever he has free time...