—"Station."
These were Fortresses built in various places under the orders of the ruling Shogunate to resist the threat of the undead monsters known as Kabane.
Fortresses were surrounded by layers of steel walls, blocking the armies of undead monsters attacking from the ground and serving as the last bastions protecting humanity.
The only means of travel between these station Cities were armored locomotives called Hayajiro, which maintained the circulation of supplies and resources throughout the country.
Of course, Stations could not repel the Kabane hordes with absolute certainty.
In this era, Stations fell to massive Kabane assaults every so often, steadily reducing humanity's numbers and erasing more and more cities.
Under such circumstances, no one should remember, right?
Long ago, there was a station that likewise fell beneath an assault by the Kabane horde.
Its name was Aragane Station, a station whose main industries were ironmaking and steam engine production.
In an age when Stations constantly fell, Aragane Station's disappearance should have amounted to nothing more than a newspaper headline, unlikely to remain in many people's memories.
Yet, strangely enough, even today, the name Aragane Station was still spoken by people in this world.
Because that station had been rebuilt.
It had been rebuilt by the people of the former Aragane Station, who had ridden the armored locomotive called the Iron Fortress, survived one danger after another, and finally achieved rebirth through everyone's efforts and aid.
It truly was an incredible thing.
Even now, countless Stations had fallen under the Kabane threat, yet Stations that had managed to be rebuilt were almost unheard of.
Then, one day, the former Aragane Station residents aboard the Iron Fortress had suddenly stormed into the fallen ruins of their old station, fought bravely with weapons capable of harming Kabane, successfully reclaimed Aragane Station,