As a Uma Musume player, he never imagined he would one day become a Uma Musume himself. His first day as a Uma Musume: "Uma Musume bodies are beautiful and smell wonderful, I'm so cute!" Three years later: "Paper dolls don't matter, I just want to win!" A mutation in the game granted the player a Uma Musume body, even allowing him to travel to the Uma Musume world and be reborn as a Uma Musume in another timeline! Thus, in future races, people might witness the following scenes: [Mejiro McQueen meets Mejiro McQueen, and is dominated by the terrifying Great Escape!] [The indomitable hero, the Emperor of the East Sea, meets the ultimate emperor who surpasses even the emperor with his undefeated triple crown!] [The golden ship from Mars meets the demon ship that can turn races into a severe delinquency arena!] And all of this begins on this morning, when the player becomes the Uma Musume Mejiro McQueen!