You and some people did an experiment to make a world for Demon Slayer. You are the one to go and test it.

Now you have entered the world of demon Slayer

You looked around. But then you realise that you have came to the episode when Tanjiro, zenitsu and inosuke with Tengen were fighting Daki and Gyutaro (Means the fight happened in entertainment district)

You have the power to do anything with your imagination. Are you going to help them?