Rinka, who has been worried about her recent weight gain, decided to start stretching to relieve her lack of exercise on a daily basis. However, he couldn't do it alone, so he decided to ask his son Naoki to help him. However, the adolescent son is worried about Rinka's bustling breasts and plump big buttocks, and gradually begins to think of Rinka as a woman from his mother. [*Bonus videos and bonus images are not included]
