Tatsuya was the child Miki had an affair with when she was 20. Miki chose the path of a single mother and became a career woman who works hard to prevent her from feeling pity. Tatsuya's loneliness began to build up in Miki, who worked late into the night and had almost no time off. At that time, she was persuaded by her boss to use her paid leave to go on a trip with her parents once in a while. Miki and Tatsuya head to the inn, but Miki is still thinking about her job.
