EXO high is a prestigous boarding school for boys.  It's a well known school only for the rich which boasts itself from producing not only academically bright students  but polished in performing arts as well.  However, it's not successful  because of the school rules and discipline but by something else.  It's a mystery how they did it. The Director himself believes that if someone wants to learn, he will learn effectively and need not rely on the school since it's all up to the students.  With this, the school doesn't implement too many complicated rules. 

The students can sleep whenever they want to or do whatever they wish to as long as they don't sneak out at night.  They are even allowed to skip classes and head out to the city but only until 8pm and the school gates will be closed. Somehow the school manages to rank 1st among the private boarding schools in korea.  

Not until last year,  when the school's ranking has dropped to 3rd.  The Director blamed everything to the Student council namely Kris, Suho and Chen and took all the students' their 1 month vacation to just stay in their dorms. As the Vice President of the student council, (yes, since even the president is busy with something else) Suho had to act on it. Even if he really never understood why did the director blame it to them when it was clearly the school's loose rules that has dropped the students' aggregate grade. He just didn't want his vacation by next year would be sacrificed again.