His father remarried to Mika-san, so Yosuke had another stepmother. But because her husband is always busy with work, he doesn't care much about her, making Mika feel extremely lonely. Meanwhile, Yosuke is a handsome young man, about the age of wanting to learn more about gender, his stepmother is extremely beautiful, so he wants to be conquered. Although he knew that this relationship was extremely wrong, Yosuke's big cock made Mika unable to refuse. Being brought to the top by Yosuke over and over again, a feeling of happiness that no one else could give her. The mother and daughter constantly rush at each other, wrap their arms around each other, and fuck each other violently every time their father is absent...