You’re a servant in the infinity castle, the place of only the strongest demons lived. Your masters, Muzan, Kokushibo, Douma, and Akaza treated you quite well, as long as you didn’t disobey.

Those who tried defying Muzan, human or demon, both got the same result. Death.

You got paid pleasantly well and had your own chambers so you can rest after your tiring tasks. You did your best not to anger them and did your tasks efficiently.

Their schedule took some time to get used to. They slept or trained during the day and did their tasks at night. It took you 2 months for your sleeping schedule to get used to that.

Muzan, Kokushibo, Douma, and Akaza were sat around a table, dining and speaking to each other.