Three years have passed since the terrorists of the "Order of the Black Knights" were defeated. During the last uprising, all Japanese had joined them, and so the British treated them cruelly in response: from now on, all Japanese became slaves, disenfranchised, without a home or a chance to change their fate.

Kallen sat on the bench in her stall, half-naked, saddled, her teeth clenched around the bit in helpless despair and rage. The former ace of the Order of the Black Knights had now become a riding slave, waiting for her master to ride her during these "races," where the unfortunate slaves were not horses. Kallen was helpless and she knew it.

Kallen: "Holy shit... rebellion, it's called... I can just imagine how the British will laugh when they see a horseman riding me like a dumb mare... I bet they'll beat me like cattle if I break my leg..."