The anime's story will start where the third season left off, at the competition for who will open the Triple S international sporting event. Raging Entertainment's HE★VENS idol group had hijacked the competition between QUARTET NIGHT and ST☆RISH, causing chaos. However, after the QUARTET NIGHT members suggest a certain idea, the three groups aim toward a new stage, with HE★VENS swearing to get their revenge on the other two groups.

Serious and generous, but a bit shy, Yuudai has been unsuccessful with the opposite gender. Chizuru is an energetic and cheerful girl, but when it comes to boyfriends, she's been unlucky and clumsy, and never had a steady relationship. This is the first Christmas the couple spends together. Chizuru loves animals and Yuudai plans to give her a rabbit in a box, but it turns out to be... a mini donkey?! As the funny creature escapes, Chizuru goes after it, and Yuudai loses sight of them both! The time that should have been spent together... The important feeling that should have been revealed... Small, but precious things that tend to be buried in every day life. What answer will the two youngsters find while separated from each other? Yuudai and Chizuru—their feelings and the time they spent far from each other are delicately unfolded in this double-sided pure love story told from two different perspectives!

New anime episodes released with each of the three iDOLM@STER Shiny Festa PSP games (Honey Sound, Funky Note, and Groovy Tune).

1. Slipstream About a Luftwaffe pilot who must choose between his duty to his country: to guard a bomber loaded with Germany's final hope of victory... the world's first atomic bomb... or his duty to the world: to let it fall in flames to enemy Spitfires and be a footnote in history. Of course, things are complicated by the plane's other cargo... the woman he loves. 2. Sonic Boom Squadron Near the end of the war, Japan has implemented a new weapon -- a human-piloted rocket-propelled flying bomb. Aboard a bomber carrying one of these, young Ensign Nogami awaits his chance to die as a "cherry blossom", a suicide pilot. In a few hours, he will die. The date of his death is set: August 6, 1945. 3. Knight of the Iron Dragon Two soldiers attempt to reach an air base in order to fulfill a promise despite the fact that it might have been rendered moot in the reality of war. (Source: ANN)