Hwang Hyunjin is a mafia boss of 24 years old, which means he's cruel, merciless and ruthless, hyunjin has a elder brother named lee know who is 26 years old

Felix is a sweet innocent and cute boy who is a doctor, and has a best friend named Han

Hyunjin got a arm injury and lee know brought hyunjin to hospital but Hyunjin was annoyed

Felix was the doctor who will treat hyunjin's arm injury, whole hospital was in fear cuz of hyunjin but Felix wasn't and hyunjin got attached to the boy