Smartphone The Idolmaster SideM: Growing Stars announced for iOS, Android Teaser trailer released. Bandai Namco has announced The Idolmaster SideM: Growing Stars for iOS and Android. It will be free-to-play with item-based in-app purchases. A release date was not announced. The Idolmaster SideM is Bandai Namco’s male idol-focused The Idolmaster subseries.Watch the teaser trailer below. Visit the teaser website here.