At the prestigious Harmonia Music Academy, where talented music students and future guardians are trained through a program called "Scratch," we encounter Shuon Tempermento, Calma Perdentosi, and Energico Apassio - an unlikely trio forced to confront failure when they receive a perfect zero on their critical Scratch entrance exam. Referred to as "The Problematic Trio," they must unite in order to solve the mystery behind Shuon's missing sibling, prepare for an oncoming conflict, and confront emotional challenges that may jeopardize their academic success. What trials and fortunes await these remarkable protagonists?