Suzune Miyama has spent most of her childhood bedridden due to a weak heart. Yet, despite her illness, she has always dreamed of becoming an idol. Her chance finally arrives with the seventh Selection Project—a grueling series of competitions best known as the launching pad for the legendary idol Akari Amasawa. Anxious yet excited, Suzune enters the preliminary round of the Selection Project. Although her singing impresses the judges and her fellow competitors, she is unfortunately overwhelmed by nerves and freezes mid-performance. She recovers quickly, but the stumble is significant enough that she loses the winning spot and is disqualified. Or so it appears—until Seira Kurusu, the girl Suzune lost to, announces her intention to drop out of the Selection Project. Seira believes Suzune is a more talented singer and therefore deserves the right to compete. Caught off guard by this decision, Suzune promises Seira that they will meet again as top idols. She prepares herself for the challenging obstacles that lie ahead.