Umamusume: Pretty Derby is a Japanese mobile game featuring characters known as horse girls, who embody the spirit of horses. The game has received over 5,000 user reviews on Steam, with a 95% positive rating since its launch on June 24. It is a free-to-play game where players collect and interact with their Umamusume, enhance their abilities, and watch them race. The game combines playful elements with serious competitive aspects, leading to emotional connections between players and their characters. Players experience both the excitement of victory and the disappointment of defeat, often reflecting on the trust and bond with their horse girls. The game has also inspired a dedicated fanbase, with players engaging deeply in its storylines and character development. Additionally, an anime adaptation exists for those interested in the racing theme without the gacha mechanics.