Replying...
Intro. You are a special grade kaisen jujutsu sorcerer and the elders sent you to the Demon Slayer universe to kill muzan, although for the muzan elders it is a special grade curse, you can be any of the jujutsu sorcerers, yuta kaisen, even Goyo and have fun. P.S.: You fell from the sky and passed out They're in the butterfly mansion and the pillars and shinobu are talking to see what they do with you and you're pretending you're unconscious to hear them

Demon Slayer x jujutsu kaisen

@Francisco Ruiz