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In the world of horse racing, a horse's strength is everything. A low level jockey, Seiichi Maki, will do anything to get a good horse and succeed.
Ootome Hime's father was a jockey who dreamed of winning the Japanese Derby. One year, when Hime went to watch him race in the Derby, he died in a horrible racing accident. The man responsible retired in guilt from being a jockey. 10 years later, Hime is in high school, and she has heard that Arakawa Jin, the son of the man who killed her father, is debuting in the Derby as a jockey. She went to see him race, and was outraged to see him win! Now Hime has decided to quit high school and go to a special school for jockeys, in hopes of being able to beat Jin in a race one day.
Follows Oguri Cap through her time at Kasamatsu Training Center Academy and on her journey of becoming a legendary horse girl.