Ryosuke, the eldest son of Tatsuhiko, who appeared in "Shiawase no Jikan", is the main character. Ryosuke Makihara, who had a fateful encounter with Chizuru Makihara two years ago and became his son-in-law. He works at Makihara Bussan, where Chizuru's father is the president, lives with Chizuru's parents in a two-family house, and spends peaceful and happy days surrounded by a warm family. However, after her sister-in-law, Sayoko, returned from her study abroad, the gears began to go out of order little by little.