Mana Shikimiya has just transferred to Marehoshi Academy, a school that mandates every student to join one of its numerous sports or cultural clubs. Following a brief tour of most clubs led by Student Council Vice President Minori Hasegawa, Mana comes across the Lyrical Tradition Dance Club. There, she encounters its only members: Mizuha Ichikishima and Sayu Tsukisaka. Captivated by their singing and dancing, Mana joins the club, and together they strive toward their dream of winning the Prism Stage—a national competition that crowns the country's top idols. However, before Mana and her new friends can focus on the Prism Stage, they face a more urgent issue: the student council is about to disband the club! Lacking sufficient members or any significant achievements, the club is set to be shut down, meaning the members' dreams will end before they even begin. It falls to the trio to recruit the additional members they need and build an idol group strong enough to qualify for the Prism Stage and ultimately win it.