Married woman Ayumi became pregnant after a single act of incest with her real younger brother, and she continued hiding this from her husband. However, the truth eventually leaked out to her husband. Ayumi tearfully apologized, but her husband embraced her tightly and whispered, "Thank you." He had mistakenly believed the child was his own. As Ayumi tried to confess the truth, her husband silenced her with a passionate kiss, leaving her speechless. From that moment on, Ayumi's life descended into hell. From humiliating training to servitude training for men, the torment etched deeply into both her body and mind. Hating herself for becoming intoxicated with pleasure, once again today, she submits to her real younger brother.