The international G1 event, the Japan Cup, is fast approaching. One by one, the participating Umamusume trickle into Japan from all over the world, including the Italian champion of the Prix de l'Arc de Triomphe, Toni Bianca. Ever vigilant, Musaka sends Belno Light on an undercover mission with one goal—learn as much as she can about their opponents. Among these racers, Belno Light happens upon a particularly odd one...