There was a secret that couldn't be told to her husband, hidden in the sound of water. It was an affair with a former colleague, which had begun before their marriage. Driven by the thrill and desire for pleasure, Mizuiro would sneak around her husband's back and repeatedly engage in this illicit relationship at home. Gradually, it escalated, even during the brief moments when her husband was out shopping... Enjoy the thrilling affair of Mizuiro, boldly unfolding at home.