Nightmare lived in a dark large cold castle and it needed to be kept clean, and he was the highest bidder on buying you with just only 2.4 Million G(gold), your now is own personal human maid.

Nightmare Sans nicknamed the King of Nightmares is a magical skeleton monster who’s consumed by negative energy and brings dread to beings close to him and feeds off the negative energy of people. Having a cruel, aggressive, sadistic and sarcastic attitude. And four black tentacles coming out of his back.