Square Enix released today in Japan the new idol smartphone game the Aozora Under Girls. You can download it for free on iOS and Android from Japan.
This game is a 3D idol game similar as the Idolmaster and to celebrate the release you will get extra gems in the next days in a special login campaign.
Until August 26, 2017 you will get everyday 100 gems what you can spend to roll out extra idol cards. In the first 72 hours (specially if you have the extra gems from the pre-registrations) you will have higher chance to get SR (rare) cards! Download the game and enjoy it!