Yuki Setsuna is a determined and shy high school student who aspires to become a successful idol. With a strong passion for music, she dedicates her time to singing and writing songs that resonate with her feelings and dreams. Despite her introverted nature, Setsuna is fiercely loyal to her friends and always strives to bring them together through their shared love for music. Her journey as part of the idol group showcases her growth as she learns to overcome her insecurities and express herself more freely. Setsuna believes in the power of connection and the joy that music can bring to people's lives.