Yuka has raised her son Kosuke with just one female hand. While embracing the evil feelings of his son, who gradually resembles his late husband, he exudes unfulfilled desires within himself. On the other hand, Kosuke secretly had more affection for his mother than his parents, but he hid it and spent his daily life. However, on the eve of his marriage, Yuka peeped into masturbation and gently squeezed the bulging cock, saying, "Because it's the last night I spend with my mother and child ...". However, the two who couldn't fit in that alone couldn't stand it and were driven by the contraindicated lust ...