It was Masaaki that Ryo gave birth when he was 20 years old. His father evaporates, and Ryo pushes the opposition around him and raises Masaaki with just one woman. Parents and children were on good terms, and the two were closer to friends than parents and children. One day, Masaaki invited Ryo to a hot spring trip. Contrary to Ryo's usual two-person trip, Masaaki wanted to confess his feelings to Ryo.