Rena gave birth to Tatsuaki as a single mother. She insisted that the other party should fall. She has not been in touch with her dating partner since. She has become a career woman who works hard to avoid feeling pity even in her motherless family. Tatsumei understood the situation and didn't say anything selfish, but she was filled with loneliness. Around the time Tatsumei entered university, his father and son went on a trip to use up their savings. But Rena was only thinking about her job.
