In the survival audition show, Hyunjae and Sooan supported each other and were affectionately seen by fans as a couple In the end, however, only Hyunjae made his debut. One year later, Sooan has become a stage staff member, and he crosses paths with Hyunjae once again.

Caught up in a scandal, Jaemin chooses to withdraw from the survival audition show on his own. One year later, he meets Khun, a Thai exchange student, in the university cafeteria.

As Hyunjae and Sooan reunite, painful memories from the past come rushing back. Meanwhile, Jaemin and Khun unexpectedly open the door to an ambiguous misunderstanding while moving into Khun's new place.