Her husband is posted overseas, her son is in a rebellious period, and she is frustrated from loneliness, and masturbation has become a daily routine. One day, my son's friend, Makoto, who came to play, injured both hands. - He can't live his daily life, and Yuka buys him care because he is sorry. Unlike his rebellious son, one day when he felt the joy of serving his honest reaction, Makoto got an erection while his body was being wiped. Then, Yuka, who felt the pain in her body with his strong, couldn't stand it.