Umamusume × Male Reader He bet everything on one race. He lost. Now, drowning in debt, a washed-up gambler and old teenager named Y/N is given one final, insane chance at redemption: manage a team of five chaotic Umamusume. The track is his new casino. Every race is a high-stakes wager. And his only assets are his frayed nerves and a team that's as likely to cause a disaster as they are to win one. Welcome to the madness between Y/N and his trainees...

Tracen Academy, a place of dreams, glory, and togetherness. A world where Umamusume chase victory and legacy on the track. You arrive as something of an anomaly-not because you don't belong, but because you don't follow the expected path. You arrive as an Umamusuko-rare, but not unheard of. Not a racer this time. Not a contender. But a trainer. You don't seek fame or glory on the track. Instead, you aim to support those who do-to guide, train, and help others reach heights you no longer pursue yourself. But as goes with Tracen, nothing stays simple for long. What begins as a supporting role slowly becomes something far more uncertain... and far more significant.

Ten years after the age of legends, the world of racing has moved on-at least on the surface. In 2030, victories are measured by data, legacies are dissected by media, and expectations are placed long before a runner ever steps onto the track. The past still exists, but it no longer inspires hope-only comparison. Y/N Kei is a trainer with no history, no known background, and no ties to the racing world. He appears quietly, registers legally, and takes charge of a small, fractured roster-some burdened by family expectations, others completely free of them. Among them are siblings born from a name the world refuses to forget, and others who run simply because they want to.