Satsuki and her husband's junior colleague, Yano, have found their ideal partner and are building a happy family. However, they just can't overcome their physical compatibility. They are drawn to each other even though they know it is forbidden. They can't let go of their exquisite sex partner now. They lose themselves and lose their words, and are immersed in sex, laying bare Kokoro and passionately seeking each other. The secret rendezvous with the best lover never stops.