At the end of the
Reiwa era, Japan was hit by the effects of nuclear war around the world, resulting in an influx of refugees, followed by a deadly virus and a devastating earthquake, while the country was mismanaged, with those in power levying heavy taxes, leading to famine. Eventually, the people began a revolt, which overthrew the national government, though the population was reduced to a tenth of its pre-war size, the technology had been reduced to that of the
Meiji era, and the country was divided into three kingdoms: Yamato, Takeo, and Seii. One hundred years later, a man named Aoteru Misumi leads a movement to reunify the country. ==Characters==