Saki lived a peaceful married life with her kind and caring husband. However, her only concern was that they rarely had sex anymore. No matter how many times she initiated, her husband began avoiding her for some unknown reason. One day, when her husband's boss, Kimura, visited their home, Saki boldly made a move—and was taken by him. Struggling with guilt, she confessed everything to her husband. To her shock, he revealed that he had offered her to Kimura as retribution for being exposed over corporate misconduct. Enduring the torment under Kimura's control for her husband's sake, Saki soon uncovers a hidden, twisted secret: a dark, desire-fueled contract between the two men.