Jungle Pocket, a.k.a. Pokke, is a Umamusume girl who has been running free in freestyle races, aiming to be the strongest. On a whim, Pokke watches a race in the Twinkle Series. She is shocked by Fuji Kiseki's performance in the race, and decides to challenge for the Twinkle Series herself. Pokke enters "Toresen Academy," where Umamusume girls gather, and under the guidance of trainer Tanabe, who raised Fuji Kiseki, she takes on the "Classic Triple Crown Race," a race she is allowed to attempt only once in her lifetime. What awaited him there were rivals of the same generation who were even more talented than Pokke. Dedicated to her work, Dantsu Flame continues to work hard and honestly. Manhattan Cafe, running after a "friend" that only she can see. And Agnes Tachyon, a mad scientist who seeks beyond the possibilities of Umamusume. These Umamusume girls put their pride, their will, and their souls on the line. The hot and fierce battle opens the door to a new era.
Unfortunately the movie Umamusume: Pretty Derby – Beginning of a New Era is not yet available on HBO Max.
| Writing | Kiyoko Yoshimura | Screenplay |
| Writing | Tetsuya Kobari | Series Composition |
| Visual Effects | Jun Yamazaki | Character Designer |
| Writing | Tetsuya Kobari | Scenario Writer |
| Directing | Ken Yamamoto | Director |
| Visual Effects | Jun Yamazaki | Supervising Animation Director |
| Directing | Manabu Okamoto | Second Unit First Assistant Director |
| Visual Effects | Ayaka Minoshima | Animation Director |
| Visual Effects | Kerorira | Key Animation |
| Visual Effects | Fukurou P | Key Animation |
| Directing | Ken Yamamoto | Second Unit Director |
| Visual Effects | Masashi Nomura | Animation Director |
| Visual Effects | TOMATO | Key Animation |
| Directing | Sohei Fuchimoto | Second Unit Director |
| Directing | Toshimasa Kuroyanagi | Second Unit Director |
| Visual Effects | Ryosuke Ochiai | Animation Director |
| Visual Effects | Shuto Yamamoto | Animation Director |
| Visual Effects | Ken Yamamoto | Animation Director |
| Directing | Liao Chengzhi | Second Unit Director |
| Art | Naoya Nakayama | Storyboard Artist |
| Visual Effects | Miyachi | Animation Director |
| Visual Effects | Naoya Nakayama | Animation Director |
| Art | Ken Yamamoto | Storyboard Artist |
| Art | Toshimasa Ishii | Storyboard Artist |
| Visual Effects | Sohei Fuchimoto | Animation Director |
| Visual Effects | Yosuke Fukumoto | Animation Director |
| Directing | Naoya Nakayama | Second Unit Director |
| Visual Effects | Shian | Key Animation |
| Visual Effects | shinagiku | Key Animation |
| Visual Effects | TOMATO | Animation Director |
| Visual Effects | ump | Key Animation |
| Visual Effects | Sota Shigetsugu | Key Animation |
| Visual Effects | Aya Kondo | Key Animation |
| Visual Effects | Shuu Sugita | Key Animation |
| Visual Effects | saucelot | Key Animation |
| Visual Effects | Nii | Animation |
| Visual Effects | Odashi | Key Animation |
| Visual Effects | Mahmoud Moftah | Animation |
| Visual Effects | miton | Key Animation |
| Visual Effects | Miyachi | Key Animation |
| Visual Effects | Solal Girardin | Key Animation |
| Visual Effects | Sugoroku | Key Animation |
| Visual Effects | Takeshi Maenami | Key Animation |
| Visual Effects | Tenohira | Key Animation |
| Visual Effects | rui | Animation |
| Visual Effects | Isuta | Key Animation |
| Visual Effects | Yuki Ueda | Animation |
| Visual Effects | Takahiro Watabe | Animation Director |
| Visual Effects | saitou | Key Animation |
