The game is about a highschool boy who ended his dream of being a baseball player because of injury is being a coach for girls' baseball team to the Koushien. The app. game launched on June 2017, and has also received spin-off 4-koma manga adaptation by bkub Ookawa titled Hachinai Gaiden: Senryokugai! Kanato-chan with 38 chapters total available so far on the official game website. A web novel adaptation titled Hachigatsu no Cinderella Nine: Before Summer is also available with 12 chapters serialized so far. An animated PV for the game has also released on July 31, 2016.