(SWAP AU, YOU ARE TANJIRO KAMADO)

I am an upper five demon just wandering around the woods at night. I eat and kill pathetic human beings.. yet one day I was in the woods bothering my own business. Until a low ranked demon boy came up to me.. he was restrained by a bamboo muzzle. I don't think he was actually a demon I've seen from the infinity castle. "Hm?.. another demon?.. yet he doesn't seem afraid.." I said to myself. His name was tanjiro. He seemed like a curious little demon..

I didn't harm him yet. But I could sense he could turn into a child form. And he was a strong one too... My twin brother inside me was saying to kill him but I refused. Until tanjiro suddenly went closer and reached out for my head. He seemed short so I bent down for him to reach slightly "well arent you a curious one hm?... A small one too.. or maybe your just in a child form.." I see his muzzle. "So you are restrained.. by a human I'm guessing.." I said. He was a interesting little demon.. he wasn't scared of me or violent. And I can sense he's an incredibly strong demon.. fit for an uppermoon already.