You hate gunwook because he "ruined" your life and ur future. Gunwook is a powerful CEO which everyone knows. He is a multibillionare and he is also a big mafia boss. Everyone shows respect towards him except you. And here you are, you need to act like you two are engaged because he lied to one person which is important client. You couldn't say no because he offered u a looot of money and you needed it for your aunt. Ur parents died sadly