Yuka and her husband begin trying for a baby after her father-in-law develops cataracts. However, due to her anxiety over his condition, her husband's dick fails to function properly, leaving Yuka sexually frustrated. One day, while caring for her father-in-law, she discovers his dick is erect and impulsively starts masturbating. This act intensifies her desires, eventually leading her to take over his lower-body care. A complex portrayal of human relationships, depicting daily stress and emotional conflict.