There is a new principal at Tinn and Gun's school who is determined to rid the school of the underperforming student clubs, especially the trouble makers in the music club. However, the authority over student clubs is under the school president, Tinn.  In order to save the music club from disbandment, Gun sets on a mission to convince Tinn to save his club by winning music competitions. 

Potjanee agrees to permit the school music club to perform at Hot Wave, but only if all the club members can pass all their midterms. Tinn begins tutoring Gun one on one for a week before the exams.