Jin Adachi, a high school student, stands as a core member of the boys choir club. He projects a delinquent image yet possesses commanding vocal abilities and undeniable stage presence. Outwardly confident and ambitious, Jin balances this with a deeply supportive nature towards his fellow choir members. He emerges as a natural leader in rehearsals and performances, driven by a focus on efficiency and group cohesion. Beneath his collected exterior lies genuine care for his teammates' wellbeing and their collective success. His drive originates from a desire for musical improvement and competitive achievement, though he consistently values teamwork and camaraderie above personal recognition. Throughout the choir's journey, Jin encounters various challenges testing his resolve. These experiences ultimately strengthen his dedication to both music and the group's shared goals. His perseverance becomes a key motivational force within the choir.