Transmigrating to the world of horse girls, becoming a trainer, and obtaining a system. Each of these is a joyful experience, but when combined, it's triple the joy. I've even envisioned being intimate with a horse girl, having a baby girl, and a daughter becoming a Triple Crown horse girl, a future Hall of Fame horse. But why has reality turned out this way? Standing at the entrance to the arena, I look down, still able to see my toes, but not my entire paw. The horse girls all around me gather around me. Emperor of the East Sea: "Reiko, I will prove that Team Spica is the best!" Silent Suzuka: "Reiko, I won't lose, because I'm Silent Suzuka!" Mejiro McQueen: "Reiko, I will protect everything in the Mejiro family." Special Week: "Reiko, it's my duty to restore the glory of the foodie world." Excellent Quality: "Reiko, even if you target me, as long as I don't come in third, I'll be a success!" Wait, is there something strange going on here? Special Week, I'm not a big eater, why are you meddling? No, why should I, as a trainer, transform into a horse girl and stand on the track?

After traveling to the world of Uma Musume, instead of becoming a trainer, he unlocked the Uma Musume Treatment System and became a doctor?! Determined to improve his medical skills and become a miracle healer, Lin Anran activated a system quest, only to discover that he had to transform into a Uma Musume to win the competition. The characters he drew were... [Platinum Cintrea] and [Margaret Rinkou]?! So—Tenma is a Uma Musume, too?! But the first of the Triple Crowns, the Gaoyue Sho, has concluded, leaving no way to win the complete Classic Triple Crown. It's all or nothing! Transforming into Platinum, he chooses the unparalleled [Transformation Triple Crown]! Transforming into Rinkou, he competes in the American Triple Crown on clay, and participates in the Dream Cup to face off against the legendary Secretariat and Fighter! As he continues to win, his career as a doctor flourishes. "Hey, can you only treat me, the horse racing girl, for the rest of your life?" "I've never felt happy running a race, but for Dr. Lin..." Lin Anran: "Gua, don't come over here!!!"... [There are already a million-word old books "Horse Racing Girls, Start to Tank Down" and "Is This Considered a Hero?", so stay tuned for the large amount of free content.]