After their father died, Aya and Koji became a single-parent household and moved in with their paternal uncle, Tomohiko. However, after just one month, Tomohiko started having a physical relationship with Aya and began acting like her husband. Then, he started treating his son coldly, and Aya had complex feelings about it. This was because she was connected to her son through a forbidden relationship… And when Tomohiko showed interest in Aya's anus, her son revealed his anger by showing that the mother is his, and began to violate her virgin anus...
