Prince Kai (Royal Tutor Fanfic)

I've been dying to write one of these and I feel like I'm gonna write another one since this is gonna be based on the movie instead of the anime so I feel like I'll do another with the anime but anyway..

The twin princes of the Romano Kingdom have an older sister who really doesn't care much for the throne but she was forced by her father to go with him and her brothers to the Royal Kingdom of Glanzreich and choose one of the princes to marry.. preferably the oldest of all 5. So without much of an option she goes.. but the first in line isn't the one that interests her. She has a peculiar personality and her father isn't proud of her for that personality which is probably why he's forcing her to marry one of the other princes but soon she finds that this may not be so bad.