A Sinners World (Black Butler Sebastian X Reader X Claude)

Reader is a being much more powerful than any other Demon or Reaper that walks the Earth, no she is God compared to them.

When London is once again struck with chaos both Phantomhive and Trancy have to work side by side to catch the muderer, both unaware of what this creature does to their demon butlers...

"I can't help but be a sinner"