Yuka's man is assigned abroad, her son is rebellious, her disappointment increases due to loneliness, and masturbation becomes a daily habit. One day, my son's friend, Makoto, comes to visit, injured in both hands. Yuka feels guilty towards him, who can't even manage his daily life and takes care of him. Unlike my rebellious son, one day when I feel joy in serving in his honest reaction, Makoto got an erection while his body is being cleaned. After that, Yuka, who feels pain in her body because of his strong cock, could not endure it.