Taka no Tsume Gaiden "Himitsu Kyuusha: Uma no Hizume - Derby Conquest"

Eagle Talon’s secret stable falls into trouble when the old trick it relied on to produce results is banned. At the same time, a wild three-year-old horse named Abareuma-nosuke arrives with absolutely no interest in behaving. Yoshida tries to handle the newcomer, but controlling a horse like this is far more difficult than simply climbing into the saddle.

Then a mysterious amnesiac appears, remembering little about himself beyond the fact that he is a jockey. With the Japan Derby drawing closer, the stranger and the unruly horse become the stable’s unlikely hope of turning its fortunes around. Naturally, once Eagle Talon is involved, preparing for a race has almost no chance of proceeding normally.