Description：Mitarai Yo (played by Rika Adachi) is a white-collar woman working in a large company. She is very responsible at work and is trusted by her superiors and colleagues. However, Yo's reliability does not extend to the field of love. Every relationship of Yo has not gone smoothly and she always encounters many difficulties. Ishida Ren (played by Shirasu Jin) is Yo's high school and university classmate, and also Yo's most trusted friend. Only in front of Ishida can Yo speak her true thoughts and inner words without scruples. On the day of Yo's 29th birthday, the two made a half-joking bet that if one of them got married first by the last day of his 30th birthday, he would give the other a "gift" of 300,000 yen. It's not just a coincidence but also a destiny. Since then, Yo and Ishida have met their new friends on the road of life.