At the Seisho Music Academy, the 99th Graduating Class is rehearsing for the annual production of the theatrical play, Starlight. Behind the scenes, however, an underground "Revue Starlight" audition, orchestrated by a talking giraffe, pits the students against each other in stage battles in order to shine as the top star. Karen Aijō, upon being reunited with her childhood friend Hikari Kagura, comes across these auditions and battles to become the top star alongside Hikari..