One day, Shohei's father brought home a young and beautiful woman named Sanae. Soon after, Sanae took on Shohei's last name and became his mother. Having lost his mother at a young age, Shohei was not accustomed to having a woman in the house. Living with this beautiful woman who was close to his own age was too stimulating for him. And then the day came when he could no longer suppress his surging sexual desires and raped Sanae.
