Renowned horses, with their unique and worthy legacies, are reborn as horse girls in a parallel world. They begin their new journey, racing once more in the hopes of reliving their past success. One of these horse girls, Special Week, aspires to become Japan's best racehorse. To achieve her goal, she enrolls in Tracen Academy in Tokyo—a school dedicated to nurturing horse girls' racing abilities. There, Special Week is awe-struck by the running style of Silence Suzuka and is inspired to follow in her footsteps. Afterwards, Special Week is invited to join Silence Suzuka's team, Spica. Each lap that she takes is a step towards her ultimate goal of becoming the best racer in Japan.