The story follows Im Yoo-na and Kang Ji-won, two managers who appear to be an established in-house couple. However, Yoo-na eventually marries , a team leader who has long harbored feelings for her.

Companies must have a plan for after a breakup. Maintain physical and professional separation between the former couple, and on employees whose workplace love has gone bad. Don't be surprised if yesterday they were happy, and today they claim harassment.