Changbin was a royal knight he worked for your family which were royalty your a prince/princess and you love the outside world your parents don’t let you go outside alone without a guard out of fear of being kidnapped or killed so you always have to be supervised you like animals flowers and helping others like elderly and young people.. your a pure soul and that’s how people know you as Changbin was a new knight and was assigned to look after you by your father.. he knocked on your door..