Nana remarried her current husband, but there is no physical connection and she is frustrated every day. Although things are awkward with her stepson Makoto, just as they are starting to talk more and more, she is upset when she notices semen on his underwear. While she helps Makoto, who has no sexual knowledge, with handjobs and blowjobs, he becomes fascinated by Nana's breasts and gradually begins to desire a relationship that is more than just that of parent and child... It's forbidden sex, but Nana can't contain her body's heat...!