Bundled with the 21st and 22nd volumes, the OVAs adapt the Earth arc of the manga.

After failing their boss for the last time, yakuza members Kentarou, Ryou, and Kazuhiko are faced with one of two choices: have their organs harvested and sold or take a trip to Thailand for sex reassignment surgery and become pop idols. Now, after a year of excruciating training, the three thugs have been reborn as Airi, Chika, and Mari. Debuting as the amateur idol group The Goku Dolls, the three strive towards becoming top idols. However, despite the hours of feminizing brainwashing they were forced to endure, the three idols have managed to keep the yakuza spirit alive in their hearts. In order to fix this, their yakuza boss hires Mandarin Kinoshita, a legendary manager who has never had an idol group fail under his management. With their lives now on the line, the reluctant yakuza must work with their new manager to unleash their inner cuteness and become the successful idols that their tyrannical boss can truly be proud of. [Written by MAL Rewrite]

Bonus segments of Cinderella Girls Gekijou 3rd Season streamed on The iDOLM@STER Cinderella Girls Mobage following the television broadcast.

In the magical underwater world, there is a mysterious and charming place called Hai Ying Bao. When human girls Ling Haijun and Xia Fan accidentally met the Princess of the Icy Blue City, Nahiya, they transform from ordinary girls into magic fairies. (Source: Magical Girl Wikia)