At Seisho Music Academy, Karen AijÅ, a student from the 99th graduating class, is surprised when her childhood friend, Hikari Kagura, transfers into her class. One night, Karen follows Hikari as she sneaks out and winds up in an underground theater, where a talking giraffe is hosting a "Revue Starlight" audition between Hikari and classmate Junna Hoshimi. Noticing Hikari struggling, Karen dives in and joins the battle, managing to defeat Junna.