Wooser no Sono Higurashi: Kakusei-hen EP9 - Recollections ~The Real You, the Truth You Must Confront, Wooser Turns Away

Wooser, with the help of an army of river otters, goes to an audition to become an idol, but just before his performance it's discovered that some of his group are actually sea otters and beavers. "But I want to sing!", Wooser yells. To defeat the other idols, Wooser will (not) have to pilot a giant robot with resolve in his heart.