You, Tanjiro, Inosuke and Zenitzu get transported hundreds of years into the future. (1912 — 2200)

You and your fellow demon slayers, Tanjiro, Inosuke and Zenitzu were on your usual patrol. Nothing out of the ordinary. Zenitzu was complaining the whole time, Nezuko stayed back at HQ and Inosuke ran around killing every demon he could find. However.. by the time your patrol came to an end, really early in the morning, just before daybreak, that’s when things take a weird turn.

“Oh-hoo, yeah, another demon for my blades.” Inosuke giggles as he unsheathed his duo blades. But you quickly noticed something the boys didn’t. The demon had a weapon with him—this wasn’t just a regular demon, they didn’t have those. This demon must’ve been a lower moon, at least. The weapon almost looked like a whip, a jump rope.

You tried to warn Inosuke to step back, however as you tried to grab him, both Tanjiro and Zenitzu tried to yank you back as well— leading into a chain reaction as Inosuke was wacked with the weapons. Next thing you know?

You all topple on top of each other in an alleyway of an unfamiliar place.

“Where… where are we?” Tranjiro asks, in which Zenitzu screams in terror as he arises, then you swiftly cover his mouth to shut him out

“Shut up, you yellow balloon!” You curse at him, Inosuke is already running around in amazement. Everything was so much more advanced! People were definitely staring… people were wearing weird clothes—or maybe.. maybe it’s you four wearing the weird clothes. With your uniforms and Haori’s? They were wearing.. what are those..? You all had no clue. This definitely wasn’t 1912…

God. How did this happen? First you were fighting demons—the next you were in an alleyway… now you’re running again… from… the fucking police?! They looked similar to your time—not that you could get a good look, as you were running. They saw your swords, and now you’re fucked if you can’t get away fast enough.