She has not been satisfied both in love and at work and often drinks with Kaori and Koyuki, her best friends since high school. One day, when the three women drink at an izakaya, making complaints against men they've dated before as usual, a mysterious handsome man with blond hair comes and tells them the reason they stay unmarried is they are just talking about "If I had done..." or "If he had been...". After this, Rinko makes up her mind to get married by 2020, the year of the Tokyo Olympic Games.