Becoming a Mother on the Practice Table: Because sex with my mother was so amazing, I became addicted to multiple ejaculations after separating from my girlfriend. (Horiguchi Sayuri FERA-193)

The son's relationship with his girlfriend is troubled. Upon learning the reason is his poor sexual performance, Sayuri proposes a sex training program using herself as a practice platform. Willing to do anything for her son, Sayuri imparts various techniques, but... her hands-on sex guide captivates him.