Having lost his mother at a young age, Yusuke lives with his father and his American stepmother. One day, when his father leaves the house, Yusuke finds himself alone with his stepmother. Though they usually spend quiet moments together, this time he becomes intensely aroused watching her sensual figure as she cooks in the kitchen. Unfamiliar feelings begin to stir within him, growing stronger until he can no longer suppress his desire. Eventually, Yusuke moves closer to his mother. Gently, she takes his hand and tenderly guides him through his first intimate experience, leading him into the world of adult passion.