Recently dissatisfied with her husband, who had been too busy with work to pay her any attention, second wife Chisato found herself growing increasingly empty inside. Before long, masturbation had become a routine part of her daily life. Watching her closely all the while, her stepson Kenta one night sneaked into her bedroom and gently embraced her body. Softly yet boldly, he confessed that her unhappiness was her husband's fault—and that he wanted to offer himself instead. Overwhelmed by his warm, tender words and the caring way he caressed her body, Chisato could no longer resist and surrendered herself to him. Trying not to wake her sleeping husband beside her, they slowly and quietly moved together, as he carefully stretched the walls of her vagina.