Kai have been in a relationship with Krystal for 3 years now and they've been through so many hard times together but he feels that the two have lost their affections for each other. Kai is now a member of EXO-K and since the company have a dating ban, Kai and Krystal broke up but Krystal still locks Kai in his shackels keeping him all fo herself and to make matters worse, Kai is secretly dating Jessica who thought her little sister and her boyfriend already broke up.