Summary:
- "Umamusume: Pretty Derby" is a popular mobile game in Japan that combines horse racing and anime-style characters.
- The game features anthropomorphized horse girls, known as "Umamusume," who compete in races and have their own unique personalities and backstories.
- The game has gained a large following in Japan, with fans enjoying the blend of horse racing and anime-inspired characters, as well as the game's gacha-style mechanics for collecting and upgrading their favorite Umamusume.