Rena went on a hot spring trip with her beloved son. To outsiders, they seemed like a loving mother and son, but in reality, they were in a forbidden relationship, and this trip was for them to indulge in their love at the hot spring. Upon arriving at the inn, they immediately headed to the private family bath. Her son went in first, and Rena followed later. Seeing her, one of the male guests suggested to his companion that she was a beautiful woman and they should go peek at her. The two men followed Rena and began to spy on her secretly. In the bathtub, her son was waiting, and Rena apologized for making him wait before entering the bath. They then exchanged their usual passionate kisses while enjoying their incestuous honeymoon. The peeping men were shocked to see Rena engaging in sexual acts with her grown-up son. Quickly, they took out their smartphones and began secretly recording the two. That night, one of the men approached Rena, pretending it was by chance, showed her the recorded video, and threatened her. Though Rena had become stronger, she couldn't resist the man and was taken against her will as instructed. Despite being distracted, Rena tried to enjoy dinner with her son. Suddenly, the men appeared, saying that the innkeeper had asked them to bring Rena over. Although Rena knew what would happen, she had no choice but to follow them quietly…
