Nanako married a man who had a young son, and soon after their wedding, her husband was transferred, leaving her to live alone with her stepson Takashi. One day, Takashi murmured, "Mom, aren't you actually lonely?" His suppressed longing and uncontrollable desire for his beautiful stepmother overwhelmed him. Overcome with lust, Takashi groped her breasts, licked her genitals, and devoured her body. Though shocked by his sudden actions, Nanako's body, aching with pent-up desire, responded intensely to his touch, shaking her heart and soul.