SNOS-476 | "Use my body however you like." For the sake of my son—who has just gotten his first girlfriend—I become his practice partner for sex. — Saki Okuda

Saki, 40, is a cheerful, easygoing woman who remains unfazed by anything; she has always enjoyed an open and close relationship with her son, Makoto. They talk about everything—even delicate matters like romance, sexuality, and sex itself. One day, Makoto returns home from a date, deeply dejected after failing during his first sexual experience. Seeing him like this, Saki suggests, "Why don't you practice sex with Mom? We can do it anytime, no need to feel awkward." And so, the two begin their secret lessons... "This is my pussy—this is where you put your penis in." "That's it, keep moving your hips... you're doing great, Makoto-chan." A forbidden sexual encounter between mother and son—he loses his virginity right at home!