Winning Back the ExEpisode 12

After a one-night stand, the female protagonistsfound out that she had slept with her fiancé who she had been engaged to for five years but had never met before? ！ However, the fiancé fell asleep, only to wake up and break off the engagement the next day? So She made a decisive turn around! But what she didn't expect was that they would meet again and become entangled again. He didn't know that she was his former fiancée, and she couldn't tell the truth because of a misunderstanding. They missed each other several times, and there were many misunderstandings. Can he win her heart back? Can they reunite and mend the broken relationship?