In Japan, horse racing holds a special place in the realm of legal gambling, woven into the fabric of the nation's culture. Yuu Arimura, a 15-year-old former idol, finds his calling in this world after being captivated by a derby. He surprises the country by leaving his entertainment career behind to join a renowned horse racing school, driven by his dream of becoming a jockey. Alongside his diverse classmates like the skilled Shun Kazanami and confident Amane Grace, Yuu forges new bonds as he embarks on this exhilarating journey. Despite the challenges that lie ahead, Yuu remains resolute in his quest to achieve harmony with his horse, striving for mastery in the thrilling world of horse racing.