The World that Began to Change! (Kawarihajimeta Sekai! - 変わり始めた世界!) is the 14th episode of THE iDOLM@STER anime series. It first aired on October 7, 2011.
Ever since the concert and an article by Yoshizawa, a famous reporter who is a friend of President Junjirō, the idols have become very popular to the point of wearing disguises in public. After appearing on a TV show and going back to their makeup room, Haruka and Yayoi encounter Jupiter who's leader, Tōma Amagase gives them an ominous warning. Back at 765 Pro studio, everyone is waiting for a magazine which features a photo shoot of the idols on the cover but Iori brings it, showing instead Jupiter on the cover. Wanting to know wants going on, President Junjirō and Yoshizawa believes this was the work of 961 Pro studio President and Jupiter's manager, Takao Kuroi, who used his connections to have the magazine cover changed. Kuroi and Junjirō were once friends in the idol industry but both of them had a falling out because Junjirō disapproved of Kuroi's methods. Because of the 765 Pro idols recent popularity, Kuroi wants revenge against Junjirō by crushing his idols using Jupiter. The girls want revenge but the Producer, Ritsuko and Junjirō tells them they shouldn't fight dirty and stoop as low as Kuroi and if they wish beat him, they should do it fair and square. As the idols are still upset over the magazine cover, Haruka helps Kotori arrange their fan letters which the others later joined. Thanks to the encouraging letters from their fans, the idols realize it is their fans that should be winning over rather than their rivalry with 961 Pro and all of them agree to work hard for them.
Colorful Days by 765 Pro All Stars