Hachigatsu no Cinderella Nine  

Cinderella Nine, 八月のシンデレラナイン, Hachigatsu no Cinderella Nine PV, Hachigatsu no Cinderella Nine (ONA)

The opening animation PV for Hachigatsu no Cinderella Nine, a mobile game app where you train/raise a group of high school girls to become baseball athletes so that they can make it to Koshien. The game was launched the following month for both iOS and Android.

Koshien is a real nation-wide high school baseball championship. The competition bans female athletes and teams, so the mobile game takes place in a fictional Japan.