* Based on a smartphone game developed by Akatsuki.

When Arihara Tsubasa enters Rigahama Municipal High School and learns that it has no baseball club, she starts up the Girls' Baseball Club on her own. Drawn to the club are girls who have never played baseball before, girls who once played it but quit, and girls who are constantly tackling great challenges. The Rigahama Girls' Baseball Club races through the trials of youth, periodically clashing and quarreling, but supporting each other all the way! And so begins the hottest summer the world has ever known...

Source: crunchyroll

Note 1: The first episode received an early screening at the "Hachi-sama 2 Hachinai Spring Live 2019" event held at Yamano Hall on 06.04.2019.

Note 2: Over the years, the series has received several rebroadcasts that included revised versions of the episodes:

* The 1st rebroadcast, called "Hachigatsu no Cinderella Nine Re:fine" (八月のシンデレラナイン Re:fine), started on 06.07.2020. It included the collector's edition versions of episodes 1-12.
* The 2nd rebroadcast, called "Hachigatsu no Cinderella Nine 2021" (八月のシンデレラナイン2021), started on 03.07.2021. It included a newly produced 13th episode.
* And lastly, the 3rd rebroadcast, called "Hachigatsu no Cinderella Nine 2022" (八月のシンデレラナイン2022), started on 11.04.2022. It included the collector's edition versions of episodes 1-13.

AniDB | ANN (2) | MAL (2) | TVDB | Wiki (en)