My New Life as A Demon Lord's Butler

After dying a mysterious death during his sleep, Vin wakes up in a colourful, wondrous world. Only to find out he is now in Hell, or specifically, the estate of the Demon Lord, Amon. Given a new body of a demon by Amon, Vin has been given a new life, to serve as part of Amon's butlers. However, this position would be a lot more cumbersome than Vin could ever imagine.