The AiChu enter the prestigious idol academy Étoile Vio School, aiming to become full-fledged idols. However, right after enrollment, a single remark from Principal Kuma sets them off on a rocky start...!? As the AiChu strive toward their respective goals through idol activities, they gradually begin to ponder: What exactly is an idol...? Capturing each shining moment of the AiChu struggling to find that answer, a youthful story now begins———!