URE-133 Raw Special Sex Service From Mom - Yumi Kazama -

Since last summer, mother (Yumi Kazama) and her son, Satoru, have been locked in a passionate, forbidden relationship whenever her husband is away. However, their routine is disrupted when her husband begins working from home. To maintain discipline, Satoru, whose test scores are plummeting, Yumi institutes a "No Sex" rule, but also offers a naughty "Reward Table" of lust-satisfying rewards based on his test scores. Now, Satoru must fight tooth and nail at the desk to earn special favors from his mother, who is increasingly tempting him with her illicit costumes.