On the day of her husband's mother's third-year memorial service, Taiichika discovers a secret her father-in-law had been hiding. In that instant, she is raped by him. From then on, her father-in-law repeatedly subjects her to rope play and sexual torment, even forcing himself on her while her husband is present. One day, Taiichika receives news that her husband has suddenly died during a business trip, and rather than grief, another emotion overwhelms her heart. The truth about her relationship with her father-in-law, and the fact that she was raped by him—what kind of ending awaits the two of them in the end?