[ENGLISH-SUBTITLE] FERA-180 Remi Kawanami, a mother who thought it would be okay to have sex just once, but ended up in a swamp because her son kept making her cum.

``The only person I can rely on is my mother!'' Koji, who is not getting along well with his girlfriend because he is bad at sex, begs his mother, Reimi, to be a practice base for sex. Naturally, Reimi refuses. Such behavior cannot be tolerated.