Mother Rin has a strong libido. But her father is naive. So her mother is always frustrated. Yosuke sensed her mother's suffering, but pretended not to see that her son could not do anything about it. However, she decides to see Rin's lonely expression when she is masturbating. I will comfort her mother... It was Yosuke's kindness. Rin accepts my child if it's just once. However, Yosuke, who has the blood of Rin, is so unfaithful that he drives Rin crazy.
