Archive of Our Own

Basically what if Muzan was more of a bigger issue and instead of focusing on mainly just the blue spider lily traveled to countries during the many traveling men and made more demons overseas causing it to be a global crisis so ubuyashiki made a new group of demon slayers that expert in many foreign languages and deals with foreign affairs and makes more connections to kill demons overseas. Basically they will find an organization of doctors that was once led by the uncle of giyuu but continued after his death and discovered demons and started child experiments to learn of demons in a scientific matter, though unethical. Giyuu is one of the main worker in the intelligence field and specializes in his father androgynous appearances to disguise or gather information of foreign affairs or just do negotiations.

There is gonna be some obvious inspiration from blue eyed samurai since it’s one of the only films I know that have the discussion of Europeans or just foreign people.