Windiland is located at the northern end of the world. It is composed of scattered city-states headed by the principalities of the Austrian family. They are famous for their wealth and connections. After the old King of Windiland died in the war with Fireland, Windiland became scattered and the principalities were in chaos. The Mori family raised the youngest son of the Windiland royal family and joined forces with the Fukuzawa shogunate and the stateless Mimic Knights to launch a war to unify Windiland. Windiland returned to a unified state, but the old royal family became a puppet from then on.
Windiland, Fireland and Lightland are in a state of three-island conflict. Foreigners Nakahara Chuuya and Osamu Dazai were originally members of the Royal Knights of Lightland. They fled to Windiland because they were tired of the unchanging peaceful life of eating and waiting to die.
I don't know if it's the abo setting, or maybe it's the whistle direction.
Stranger: Dazai Osamu, Nakahara Chuuya
Mori: mafia
Shogunate: Detective Agency
The Old Royal Family: Special Agents Division
Concept: Steampunk western fantasy setting, it's Bungo Stray Dogs. Asking is writing about expensive chaos. Maybe it will be abo.