Jungle Pocket, an Umamusume who has been racing tirelessly in pursuit of becoming the greatest, is ready to take on the once-in-a-lifetime Classic Triple Crown series. However, standing in her way are rivals from the same generation, whose talent may even surpass her own.

Renako Amaori is leaving her awkward and lonely junior high school life behind, determined to become a normal girl with normal friends in high school. Glamorous, confident Mai Ouzuka is Renako’s total opposite: wealthy, outgoing, and a literal fashion model. Against the odds, the two girls form an immediate connection. Renako thinks she may have found the best friend of her dreams…until Mai’s romantic confession sends her into a tailspin. Renako wants to prove to Mai that being BFFs is better than being girlfriends, but Mai is dead set on convincing Renako that they’re destined to be lovers.

After making a promise to stand on the top of the Twinkle Series with her trainer as a child, horse girl Narita Top Road has been practicing diligently ever since. After winning several races, Top Road's efforts finally pay off when she earns a chance to participate in the race she has always dreamed of: the first race of the prestigious Classic Triple Crown, the Satsuki Sho. However, winning the Satsuki Sho is no simple task. Numerous brilliant horse girls are also joining the race—including two other rising racers—the flamboyant T.M. Opera O and the reserved Admire Vega, who seeks revenge against Top Road for a previous defeat. Although triumphing in the Satsuki Sho and the rest of the Triple Crown races is far from guaranteed, there is nothing that can stop Top Road on her road to the top.