JUR-802 "Your stepmother will teach you how to kiss like an adult..." The seductive stepmother, Ayano Kato, steals the virginity of her innocent husband's stepson.

Ayano married a man with a child from a previous marriage, and the three of them began living together. While she had a good relationship with her husband's son, Keisuke, she struggled to bridge the gap as a mother. One day, Keisuke returned home from school with a serious expression. He then begged Ayano, who was worried about him, to teach him how to kiss. It seemed he had made a mistake with a woman. Ayano initially refused, but then decided that it was a parent's duty to help their child, and gently guided Keisuke, saying, "Mommy will teach you how to kiss like an adult..."