Despite Tinn's best intentions to help Gun keep the music club open, his mother demands that the club's instruments be sold to pay for the fees after last year's incident. Tinn creates an anonymous account on social media to secretly help Gun find new instruments for his club. 

A new student at school, Sound, provides an opportunity for the music club to recruit a new solo guitarist.  However, all does not go as planned as Sound seeks to replace Gun as the club's leader.