Mirei had been sexually frustrated for a long time. She asked her husband but was rejected, so she started masturbating next to him in the futon. Seeing this, her husband became aroused, and they had sex for the first time in a while. But their marital relationship quickly returned to normal. Mirei fell back into frustration. One day, she decided to seriously masturbate while reading a magazine. Her son caught her in the act. That night, Mirei asked her son to massage her lower back. Her son remembered her masturbating and got excited. Mirei was pushed down, and though she resisted, she reached climax. From that day on, her son kept seeking Mirei whenever his father was away. Gradually, Mirei became addicted to her son's dick, deepening their secret relationship. Viewers will be glued to the screen watching a mother sinking into a forbidden relationship.