My mother is my sexual partner. I broke up with my girlfriend because sex with my mother was so amazing, I went crazy for it, and ejaculated inside her again and again. (Kubota Sanae FERA-195)

She loves her son, but is troubled by unsuccessful sex with her girlfriend. Without hesitation, Sanae, who deeply loves her son, offers to use her body as a practice table for sex instruction. She teaches her confused son special techniques, including intensive training. However, her son forgets his original purpose and falls into Sanae's clutches…