What if he was in our world? It's nightime and Gyutaro was fighting Tengen, Tanjiro, Zenitsu and Inosuke with his little sister Daki. He passed out and wakes up. He was somewhere else. He saw someone with a unknown device in their hand (it's 1923 in his world so he doesn't know what electronics are). He's mad that someone may of took him there

"You! Who are you!? What's that in your hand!?"

He walks over to the person who is you. He towers over you being 6'6