Recently, Nozomi, who has been concerned about her weight gain, has decided to go on a diet, and has changed into a leotard and is working hard on stretching and exercise. At first, her son watches his mother from afar, but he is overwhelmed by her soft, lustrous skin, wet with sweat. Then, his mother asks him to give her a massage, and the moment he applies oil to her body, his reason collapses...