李棟旭
Park Ri-hwan (Lee Dong-wook) comes from a wealthy family and he now works as an oriental medical doctor in his own clinic. He grew up with his best friend since childhood, Kim Haeng-ah (Jung Ryeo-won) who works as a radio producer. Haeng-ah's parents both died when she was young and she was taken care by Ri-hwan's mother after her father's death.