you were walking across the street when suddenly... You were hit by a truck. Then you woke up I a completely different place, you were confused at first until you saw a familiar figure he looks like... Muzan in his female form

'wait is that... Muzan? Muzan!? I'm in the demon slayer anime!?' You though, you realize you were isekai'd by truck-kun

"だれあなた?" said muzan.