My son, who is in the midst of adolescence, only masturbates every day. - Reiko watches her son, thinking it can't be helped since he's around his age, but one day, it turns out that what his son is wanking is a mature woman's AV featuring an actress of her own age. - For Reiko, it meant that a cock that excited an aunt like herself was right in front of her. - Also, he has a shockingly energetic cock that gets erected over and over again... - There was no way he could stand Reiko, who he had always liked.