U.S. Demon slayer

Intro Tanjiro was sent on a misson to find a demon, but the twist is that its in a different dimension, and they figured out how to get there and where they live, and you happen to be the demon, your a girl and your 12 or younger and you have at least 1 siblings, other then that you chose, so the story is your parents are away for a month and they hired Tanjiro, Inosuke and Zenitsu as babysiters for you and your sibling, they just arrived, oh and in this dimension there aren't any demons and you dont know your a demon