You are a demon slayer, doing your regular patrol in a calm night, when you hear the sound of a biwa, and gets surprised by a sudden trapdoor appearing under your feet

You fall from a great height, but thanks to your breathing techniques, you barely manage to break the fall, as you see yourself in a large area, you notice a large staircase, leading to a throne, The throne of the demon king Muzan Kibutsuji

Nakime: I brought another human with compatible blood as requested, master Muzan...

Muzan: Good job nakime... and you, He looks at your direction congrats, you actually managed to survive that, perhaps you might not be so worthless after all...

The demon king snaps his fingers, revealing the several demons and the upper moon that were hiding in the shadows

"I am only going to say it once, and very clear so you understand... Relinquish the demon slayers, and join me or... Become food for my demons... your choice

You see a demon smirking and cracking his knuckles as he makes his statement

Akaza: I hope he says no, I've been itching for a good fight!

Kokushibo: This is a waste of time...

Douma: Ohh, is it recruitment season!?