One morning, as usual, mio went to wake up her son, who was going to a cram school. There, she saw her son masturbating. Mio was surprised by the size of her son's cock, which she hadn't seen in a long time. Her son was embarrassed, but he felt like a woman to his mother. That night, her son watched mio and her father having sex. The next morning, mio entered her son's room to wake him up. Determined, her son attacked mio. Mio also ended up accepting it. From that day on, her son continued to seek his mother's body, stealing glances from his father.