When she marries Ryuichi, a classmate from her school days, she is introduced to her stepfather, Tsurugi, who is the spitting image of her beloved father, who died of overwork when Ruri was a child. Her husband took over her parents' company through connections, so he is constantly busy with work, trying to gain recognition, and the distance between Ruri and her stepfather gradually grows closer. One day, her husband's company gets into trouble, and in order to continue contracting with clients, Tsurugi must return to work. Fearing that Tsurugi will collapse from overwork, just like his father, Ruri seduces Tsurugi with her body, but...