To be fair on that part. She didn't know, and even if she did Mikagura was a playboy, like she said, he was always changing Girlfriends, why is this mysterious one so special. But the part when she says she won't be giving up is eye Rolling, yes, but she is just sad and angry.
FK OFF. WHY DO YOU KEEP BOTHERING WON DAE???
DO. U. WANT. TO. DIE. ???