The beautiful and talented mother, Mayumi, lives peacefully with her family of three. Recently, she has had a bit of a problem. It's about her only son, who is at a crucial time before his entrance exams, seemingly engrossed in self-pleasure in his room... After much thought, the mother one day goes to her son's room. Seeing her beloved child struggling and gasping while gripping his engorged penis, Mayumi, out of love, can't help but support her son's sexual release. But that was the trigger for Mayumi's downfall.
