(Y/N) (L/N) was just watching a gambler from Las Vegas lose all his money betting on black in a roulette. As if on cue, an ad for a Game called Umamusume:Pretty Derby, appeared... and started his literal dive into the rabbit hole of cute horse girls running... just in time of getting damn good luck (5 3 stars in one ten pull) He got hit by a truck... I guess you all know where this is going! (I don't own the game nor any art used in this fanfic, they are owned by their respective owners)

After a incident in the ring, Infamous boxer Lucas decided to retire hos boxing career and move on and away from the Boxing world and decided to do something else besides that. So he decided to take a course to become trainer to the horse girls. He moved to Japan where he would start his new career in teaching horse girls. Will he succeed....or will his past come back to haunt him Find out in Umamusume Pretty Derby: Retired Boxer Turned Trainer!!!