Satuki’s father was once the nation’s favourite jockey. After she witnessed her father’s accident in the midst of the national horse racing, Satsuki was determined to be a great jockey just as her father has been. But first she would need to gain an acceptance at the National Jockey Academy, traditionally a boys-only academy. Above all, she would need her father’s approval to become the first ever female jockey…

source: https://www.mangaupdates.com/series/dtdmuz1/pony-tail