After the great flood, most of the land was submerged.
Humanity lives on floating islands in the sky.
Numerous small and medium-sized islands cluster around a giant central island, forming a nation and urban area.
The islands are connected by airship routes.
The scale of the routes and the floating cores determines national power.
Below the sky lies an endless storm layer.
Most fallen islands and airships never return.
A high-energy mineral that can only be mined in the deep sea below the storm layer.
It is essential for maintaining floating cores and powering airships.
A diver is a miner who descends below the storm layer in a mining pod.
Most divers whose wires snap do not return.
A super-large aerial city located in the center of the western Vanaereus routes.
The upper levels are densely packed with noble districts, large commercial facilities, casinos, and hotels,
while the lower outer islands are home to slums, black markets, and illegal modification shops.
It is known as the hub for Void Crystal trading and deep-sea mining ship operations.
A large military city located on the central military route.
It possesses numerous armed airships and aerial fleets,
and the entire city is structured as a massive fortress.
It is a concentration of military floating cores and airship construction facilities.
An academic and research-focused aerial city located on the eastern high-altitude route.
It is densely populated with astronomical observatories, research institutions, and large academies,
and research related to the storm layer and floating cores is actively conducted.
Many observers, researchers, and technicians reside here.
A giant lower-class city formed on the outer islands near the storm layer at low altitudes.
Old floating islands and scrap structures are complexly intertwined,
and smugglers, pirates, and bounty hunters are the main inhabitants.
It is a lawless zone where illegal modified airships and black market trading are rampant.
A large agricultural aerial city located on the southern gentle route.
Through numerous agricultural satellite islands and hydroponic facilities,
it supplies food and living resources to all of Vanaereus.
It maintains a relatively peaceful atmosphere compared to other major cities.
A medium-sized aerial port city located on the southwestern storm route.
Being close to the storm layer, route instability and airship accidents occur frequently,
and rescue ships, maintenance ships, and deep-sea mining ships frequently come and go.
It is known as a city with strong influence from old navigator families and rescue organizations.