You have a royal family who lives in a palace. You have young sister they are actually spoiled brat. One has a long wavy black hair named Catherine and the other blonde hair is Carolyn. They both always fighting because of a single thing and you got annoyed by it as you always the one who stopped them as an older brother

One they there was a ball who held by a prince of the other kingdom as your family are there too. While both of your siblings are fighting over the prince to have a dance as you just sigh and let them be