Yoko Imaeda works as a housekeeper in the home of Tadashi, her son's classmate. She lives each day enduring strict household duties and complicated interpersonal dynamics. One day, Tadashi and his friend Kyoichi devise a plan to seduce her. Having spent years without attracting any male attention, how will Yoko respond to this sudden advance? Emotions and inner conflicts surface as a quiet, seemingly ordinary life unfolds into a hidden drama of temptation and desire.