Yuka was staggering around in just a bath towel after her bath, forgetting that her son's friend Tatsuya was staying over. Then Tatsuya, unable to contain his excitement, approached her and asked for her body. Although she barely managed to resist penetration, Tatsuya came to stay at the Mayama house again a few days later... He asked his son, who knew nothing about it, "Do you know that Auntie is sexually frustrated and cheating on you?" In a panic, she kicked her son out and gave her body to Tatsuya to protect her family.