Luhan is a naive boy who will be attending the Yonsei High School, one of the most popular high schools in Seoul. Luhan never had a deep friendship with anyone because of his introverted personality and feminine appearance. So he decided to live in a different environment and enjoy his new school life. However on the first day, Luhan was accused of being a troublemarker by beating up a student very badly so he got moved into a special class called "EXO". A class full of hooligans and bullies. The biggest bully in the school (Kris) who always picks on Luhan with a strange class mate (Sehun) who finds Luhan interesting, together they will make Luhan's school life unforgettable.