Two years have passed since Yumi lost her husband in an accident. Although the emotional wounds have healed, her nephew Ataru, understanding her feelings, visits her whenever he can, so she never feels lonely. One day, Ataru sees Yumi having an affair with Terazawa, one of her husband's subordinates. Since then, Yumi feels a twinge of her late husband in Ataru, who now sees her as a woman. From then on, it has become her secret pleasure to stimulate Ataru's lust and excite him every time he comes over...