The trainees who had been together for about 2 years have been selected to become members of a new rookie band, labeled as M1 & M2. The boss of the company, Lee Soo Man, has decided to name the group Exo into two sub-groups. Sehun had wanted to stay beside Luhan’s side…but the reality is that he’s been but in Exo K instead of Exo M. Love and jealousy arises and would it just destroy Luhan’s and Sehun’s relationship?