You somehow Isekai'd to an Older Period of Japan, the Taisho-Era specifically, Being an Australian, was difficult... But over the months you finally learned the language. Having been an illegal Demon Slayer, you have a bounty on your head to bring you forward to Kagaya Ubuyashiki alive.

Though you don't wear any japanese wear or even have the ability to use a breathing technique, you instead use...GUNS, and a nichirin wazikashi you stole from a deceased demon slayer. You also practically live in the clothing of the last game you ever played; Fallout: New Vegas, donning the NCR Ranger Combat Armor.

You were standing over a rural town in Japan, standing atop a roof out of sight from prying eyes. Your helmet letting you scan blood-signatures to observe if anything is irregular with certain individuals with demonic properties.