THE IDOLM@STER MOVIE: Kagayaki no Mukougawa e!

765PRO collectively decides that all of the idols are in need of a new step, and comes up with a plan for an "Arena Live". Haruka is given the task of being the leader of the event, and at President Takagi's suggestion several new girls from an idol training school are added in as backup dancers. Hoping to gain some stage experience, the rookie idols participate in a training camp along with their senior idols. (project-imas.com/wiki)