[Reducing Mosaic]JUR-378 "Mom's going to teach you an adult kiss..." The voluptuous stepmother takes the lips and virginity of her inexperienced stepson brought by her husband Mariko Koto

Mariko decides to marry a man with a son who is not attending school.Yusuke, her husband's stepchild, is not recognized as her father's new wife, Mariko, and keeps her distance even while living together.Tai Mariko, who deepens her relationship with Yusuke, advises her to support her as a family and mother, and Yusuke gradually begins to open up to her heart.However, Yusuke's refusal has remained the same, and when he listens to her, Mariko is told that she has made a mistake in relation to women.When Yusuke asks to know about women's bodies, Mariko gently guides Yusuke, saying, "Mom will start with the kiss of adults."