我嫁給了前任的死對頭

She sits down at the wrong table at a blind date, and the mistake ends with her and the stranger at that table registering a marriage. He is the heir of a wealthy family, and he is also the sworn rival of the man she had been seeing in secret for the past three years. That relationship ended when she heard he already had a girlfriend and that she had been a stand-in for another woman the whole time. Her ex sees the ring on her hand afterward, regrets what he did, and finds out who she married. The blind date itself was her mother's arrangement. She agreed to go because it was the way to get back her father's inheritance.