A band was formed in a high school in Seoul. The only thing the band needed was a guitarist. The leader of the band and part-time vocalist Kang Taehyun warmed up while Junghoon the pianist and Yusung the drummer repeated the notes.

"Do you think anyone will come to the ad?"

Junghoon asked.

"I hope so, because we need a good guitarist."

Taehyun nodded and at that moment there was a soft knock on the studio door.