<ul data-eligibleForWebStory="false"><li>Umamusume: Pretty Derby, a game featuring anime horse girls based on real racehorses, has gained immense popularity.</li><li>Cygames, the developer, has incorporated real-world mannerisms of racehorses into the game and anime.</li><li>Due to increased interest in racehorses, Cygames has introduced guidelines on proper stable etiquette to address issues like trespassing and neglecting stable rules.</li><li>The guidelines aim to educate visitors on dealing with sensitive horses and maintaining good relationships with stables.</li></ul>

Umamusume's horse girl lore has grown so out of control that its developer has had to put real-life stable etiquette in place

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