Mio, a beautiful wife, has settled down in her married life in a housing complex and is beginning to think about having children. However, her husband is reluctant to have sex at night, let alone have children, and she is left with a feeling of sexual desire that she cannot control, so she occasionally resorts to self-pleasure. One afternoon, as she is caressing her sensitive parts, she looks up and meets her middle-aged neighbor Takeshita, who has come to greet her after moving in. The two, who were never meant to meet, end up in an affair that is so intense that it makes them sweat after she witnesses him masturbating...