The popular and highly skilled jockey Bunnami Ouma has a reputation for two things: his exceptional riding technique and his lecherous behavior, particularly toward his talented female rival, Hanmura Tsubasa. During a high-stakes race, Bunnami suffers a severe fall from his horse and loses consciousness. When he awakens, he discovers he has been reincarnated as a newborn thoroughbred racehorse, his human mind fully intact within his new equine body.

Now living as a racehorse, Bunnami must navigate the competitive world of Japanese horse racing from an entirely new perspective. The series follows his exploits as he uses his knowledge as a former top jockey to understand racing strategy, build rivalries with other horses, and interact with trainers and riders who are now his handlers rather than his peers. The narrative blends intense racing sequences with a mix of comedic, romantic, and adult-oriented situations that arise from his unusual predicament, including the awkwardness of maintaining a human consciousness in an animal's body.

The story unfolds across the competitive racing circuit, a setting that combines the glamour and tension of thoroughbred competition with the behind-the-scenes reality of stables, training grounds, and racecourses. Bunnami encounters various characters from his past life who now see him only as a promising horse, including Hanmura Tsubasa, whose presence continues to complicate his emotional life despite his new form. The manga weaves together elements of sports drama, fantasy reincarnation tropes, and ecchi comedy, creating scenarios where the protagonist's human desires and memories clash with his animal instincts and physical limitations.

From its serialization beginning October 10, 2020, the manga developed an unconventional premise that follows Bunnami as he adapts to his new existence, forms bonds with other horses and humans in the racing world, and pursues his competitive ambitions while dealing with the ongoing comedic and romantic entanglements stemming from his lecherous personality. The series concluded after ten volumes, with the final chapter released on June 10, 2025.