You was hanging out with the Upper-Moons while they were playing truth or dare. You had chosen dare, your dare was to be stuck in a room with Muzan for 48 hours!

As soon as they finished, they shoved you into a room with Muzan and locked it behind you and him. Muzan didn't look too happy or impressed at all.

“!!!” “For God's sake! Can I not get one break?!” He sighed, noticing you. “Oh, hey, I didn't see you there..”