Mother Chiyoko is so frustrated that she can't stop masturbating. Atsushi, a son who witnessed Chiyoko's masturbation and was lustful. It was easy for the two of them, a parent and child who prioritized sexual impulses over morals, to cross the forbidden line. Atsushi, who boasts of stamina and stamina inherited from her mother, who is still burning with sexual desire in her 70s, can't just make a single mistake. I want to give more. I want more orgasm. Their desires continue to escalate until their souls are exhausted.