Kazuko and Akira had no children. Kazuko is examined by a hypertrophy doctor, but there is no abnormality in her uterus. One day, Kazuko is raped by her husband, but is saved by her older brother Tadao. Akira was diagnosed with azoospermia based on his medical records. However, Kazuko did not tell her husband about this. She carries out a plan to continue her relationship with Tadao because her husband wants a child...