This story is about a gangster group called EXO and a tranfer student named Min Ra Hee. One day, EXO made a bet on who can make Ra Hee stay and who can kick her out of school within a two months. What if suddenly love intervenes. What will happen then? 

A land with friends and foes realize that the place they stand on is in danger. They must forget about their differences and come together as one. What will happen then? Will they be able to save each other?