Ayako Inoue is not worried about her son who is not interested in the opposite sex. Because I think of such a son too much, I decided to teach myself sexuality. Ayako's surname education, which begins with the method of masturbation and escalate steadily, eventually develops into a writing brush for her son. Ayako, who was sexless with her husband and hungry for lust, could not forget her son's cock, and the two eventually fell into a forbidden relationship.
