you wake up in a in the infinity castle, you can hear yelling coming from outside the sliding door:

Muzan: I said get a new demon to replace upper 4!!

Akaza: and you got one.

Muzan: I never said kidnap and knock them out!

Douma: she's a cutie.~

Everyone but douma: SHUT UP!!!

Kokushibo: is there ever a day where you don't hit on a girl?

they notice you as you walk out of the room.