In a world very much like our own, great race horses of the past have a chance to be reborn as horse girls girls with the ears and tails of horses as well as their speed and endurance. The best of these horse girls go to train at the Japan Horse Girl Training Center Academy (Tracen for short), hopefully moving on to fame and fortune as both racers and idols. You take on the role of a rookie trainer working for Tracen Academy and help your horse girls fulfill their long-awaited dreams.
Umamusume: Pretty Derby is Cygames' horse-based training and racing game available on Android, iOS and PC (via DMM). The game was introduced in 2016 with a fast-paced trailer by P. A. Works, who would go on to do its anime adaptation in Spring 2018. In the interrim before the game's release, the project also launched three manga: Starting Gate! Umamusume: Pretty Derby, focusing on Special Week and Silence Suzuka's life in the school, Haru Urara Will Give Her All!, about the titular loveable loser training to become better throughout her racing career, and Umayon, a Yonkoma gag strip based on the anime. After a series of delays, the game released on Ferbruary 24th, 2021.
The game was a surprise Sleeper Hit, reaching 3 millions download milestone and earned 100 million dollars near the end of its first month. A Korean release was also announced and will be published by Kakao Games. Cygames also confirmed a Chinese version along with plans for other oversea releases.
- Ambiguously Brown: Hishi Amazon has a rather prominent tan.
- Competitive Balance: Beside their numerical stats, each horsegirl are assigned ratings ranging from G to A (S rating is only attainable from gameplay) for turf, racing length, and racing style preferences. While these ratings somewhat reflect the history of the actual horses, some (especially Haru Urara) are put there to ensure that every one of them are viable for their story modes and PvP. Furthermore, the outcome of PvP can also be influenced by randomly-assigned pre-race conditions, enabling statistically inferior horsegirls to win from stronger ones.
- Cool Mask: El Condor Pasa wears a 'racing horse' mask all the time, although her character is more in line with a luchadora.
- Crippling Overspecialization: Sakura Bakushin-O's storyline hinges on this: she's a strong contender for the title of best sprinter in Japan, but her lack of stamina means her dreams of participating in the more prestigious races (most of which are on the long side) can't go anywhere. Poor Trainer has to deal with this without breaking her heart.
- In-game however, Bakushin can have the maximum rank for Mile races, which is a tad better than Curren Chan.
- Cute Little Fangs: Daiwa Scarlet and Hishi Amazon have these.
- Exotic Eye Designs: Several girls have this, most notably Haru Urara (sakura petal pattern on her iris) and Meisho (star-shaped pupils).
- Expressive Ears: Unsurprisingly, horse girls have this.
- Fictional Sport: The Twinkle Series itself, combining aspects of track and field with the terrain of horse races and idol culture.
- Gainaxing: The girls on the larger side of things have a tendancy to visibly bounce. Apparently, the Rule of Cool racing outfits run on does not include sport bras.
- Gameplay and Story Segregation: At times, some named horsegirls can be seen running (and sometimes winning) in races they would normally have no chance of being competitive in. This is especially glaring in dirt races, where there should only be five horsegirlsnote able to competently race in that.
- Gender-Blender Name: there are girls with masculine name abound, most conspicuously Narita Brian and Symboli Rudolf.
- Genki Girl: Tokai Teio and Haru Urara are energetic and friendly.
- Idol Singer: The top scorers have to perform a Winner's Concert after their victory. Official tournaments also have the girls dress in idol clothes when they run.
- Lethal Joke Character: Haru Urara is the legendary lovable loser of the horse racing community, with her real life counterpart having retired with an infamous record of zero wins in 113 races. The game has a bit of fun with this, giving her lower stats than everyone else and training milestones that mostly include participating and getting more fans, not actually winning races. But since they couldn't make her completely useless, she was given very good ranks in short races on dirt tracks, a combination that's practically unique to her and very rare in a circuit that glorifies longer races and turf. On one hand, she finds herself trailing behind on the vast majority of races like she's supposed to... but if the situation does arise, very few can compete with her.
- Of course, then Smart Falcon was introduced and she quickly proved to be a much better dirt racer in almost every aspect...
- Little Bit Beastly: Horse girls are easily identified by their tails and ears.
- Mega Twintails: Daiwa Scarlet has some pretty impressive ones.
- Multicolored Hair: Some horse girls have this type of hair, not unlike the horses they're based on.
- Named After Somebody Famous: In this case, every horse girl is named after actual Japanese race horsesnote , and it doesn't matter if they were male or female. The ones named after females wear bloomers in training, the ones named after males wear shorts.
- Oral Fixation: Narita Brian always has a twig on her mouth.
- Peek-a-Bangs: Vodka and Air Groove have this style.
- Trope Overdosed: The trailer distilled its premise to amazing levels in the short two minutes it lasted. Personified racehorses? Personified racehorse idols? Figure skating personified racehorse idols? Schoolgirl Series and Sports Story gags in the middle of it all? The trailer features all this and more.
- You Gotta Have Blue Hair: Aside from the usual shades of brown, black, and blond, some girls have very distinct hair color. Most striking examples include Haru Urara (bright pink) and Mejiro McQueen (purple).