Maki Hojo is a single mother raising her high school son, Taro, after divorcing her husband. One day, Taro wins a trip to Okinawa in a local community lottery, but since he's too busy with club activities, Maki goes in his place. When she returns after several days, Taro is stunned by the transformation—her skin is now glossy and deeply tanned, and her entire demeanor has shifted to bright and bold. As Taro struggles to adjust, Maki tells him, "My sunburn is itchy," and asks him to apply moisturizing cream on her. Taking her son's hesitant hands, she slowly guides them closer and closer toward her intimate areas...