I love my father-in-law more than my husband...

He married his classmate Ryuichi when he was a student, and the father-in-law Ken Haruri, who was introduced to him, looked exactly like his beloved father, who died of overwork when he was a child. Her husband took over his parents' company through connections, so he is busy with work every day trying to be recognized, and Ruri and her father-in-law gradually get closer. One day, her husband's company had trouble and had to return to work with a business partner. Just like his father, Ruri is afraid that the sword will fall from overwork, and seduces the sword with her body...