Nao worked in the editorial department of a business magazine. When she went to interview an entrepreneur, she met Toru, who was still working there at the time. Nao was immediately attracted to Toru's tolerance and kindness, but Toru was married. However, her strong desire to be by Toru's side never faded, and just then, when Toru proposed to her, Nao decided to marry his son. Soon after they got married, Toru's mother-in-law passed away, and Nao told him how she was resolved to marry him.