Yuu, a widowed mother who has raised her only son, Ichiro, decides to remarry her ex-husband's boss, Tamotsu. However, Tamotsu's stepchild, Yuki, who has reached her age, has become excited by Yuu's adult and attractive body. Yuki happens to witness Yu sexually processing her real son, and her desire is completely disengaged. "I want to take a bath with you." "Do the same for me." Yu deepens her forbidden love affair with her stepchild in her peculiar love triangle.
