At a Seoul high school, Han Seo-jun, known for his rebellious spirit and musical talent, finds himself unexpectedly paired with a driven and somewhat bossy new student in a school-wide music project. She, taking her responsibilities very seriously, initially clashes with Seo-jun’s laid-back style. Tasked with creating a performance that showcases their talents, her controlling approach frustrates him but also challenges him to see his potential. Still, it’s hard for him to accept her behaviour and work together with her.