Seunghyun has just moved from a small country town to the busy city of Busan. He enters his new school as a 1st year in high school and immediately becomes friends with a 3rd year, Jonghun, and his friend, Hongki. Jonghun and Seunghyun both realize they have the same feelings about music and guitar but Seunghyun can't play guitar, so Jonghun agrees to give him lessons. But as the guitar lessons go on, what will they do when Seunghyun begins to fall for him...?