On a sweltering summer day, three years into her husband's solo posting... While she initially felt lonely, she managed to get by thanks to her son, Masao. However, lately, even Masao has become a high school student, and his once affectionate demeanor has turned distant and aloof. This summer has been exceptionally hot, with their air conditioner malfunctioning, leaving her body drenched in sweat. Unbeknownst to her, her well-shaped breasts and nipples have become faintly translucent. Unable to bear it any longer, Masao, living with her, indulges in her sweat-soaked breasts, relentlessly creampieing her over and over again...