A country bumpkin who got bumped up into the big leagues, Katsuragi Ace hates the boring and small things in life. Her biggest dreams is to become the Ace of the world of horse girls, crushing races and winning prizes. While she does look up to Mr. C.B. a lot, Katsuragi Ace is aware that she is merely a goal to surpass and won't let her rose-coloured glasses get in the way of achieving it.