His stepmother, who remarried his father half a year ago, is a super serious and kind busty stepmother! His stepson is still a virgin and has no immunity to women and has never even had a girlfriend. But his stepmother, who has super big breasts with an L cup, wanders around the house. Just looking at his stepmother's breasts makes him unable to stop getting an erection... "Have you never had sex with a woman? If you want to lose your virginity to me, you can cum inside me as much as you want." Not only does his stepmother volunteer to be the one to lose his virginity, she even welcomes him to cum inside her! Furthermore, he finds out that his stepmother is actually dissatisfied with his father's soft penis, and the situation becomes even more complicated...