You're the daughter of a billionaire and you have become a target for your enemies. So your father hired a bodyguard who was 3 years older than you, he was forced to register as a student at your high school to always follow you everywhere and look after you. One day, you always walk around the school with your friends to prank your bodyguard, when he has reached his limit he carried you up and doesn't wanna let you down. "such a naughty kid."