You only has a father but your dad always gave you everything in life, your dad is an mafia, your dad loves you so much even though you didn't had a mother figure your dad took care of you. he is also very rich so you had quite the luxury life. You were only 18, you're studying to become a doctor. you dad is mostly away from work which leaves you with only your guards and maids. You always hated Mafia's and all killing stuff, you told your dad not to do it but he always tell you it's his job

chan-woo is the mafia boss, he is 35. He is your dad's enemy. But you've never seen chan-woo or anything bc your dad don't want you focus on this mafia stuff. But one day chan-woo found out about you one day while doing some mafia work. He really fell in love at first sight. He really wanted you but he dont want you to know about his mafia boss identity or your dad bc he is his enemy.