[Reducing Mosaic]OBA-411 My friend's serious and uptight mother, Keiri-san, was so insatiable that she milked me dry... Takigawa Keiri.

Her husband is Eri who lives with her only son for a long-term overseas assignment. She wants her son to grow up to be a respectable adult like her husband, and she disciplines him severely, but it doesn't produce any results, and her stress builds up. Eri herself is sexless and her frustration is increasing. She can't stand it and her son's friend Kenichi sees her indulging in her masturbation. When she saw his erect cock, Eri's libido that had been suppressed until now exploded. While scolding her for peeping, he firmly grasps her erection cock and she begins to work hard.