A few years ago, she promised his mother, left him, and asked him to go abroad to save a crisis-ridden company. His mother also promised her that she would explain everything when he came back and agree that he would marry her. So she waited for him. He finally came back, but he had a fiancée. She asked his mother what was going on, but his mother begged her again to let her leave him forever. She was heartbroken, but he came back and wouldn't let her go. He didn't love her because it was just revenge.