You are the heir of an ancient noble family, living in a beautiful castle, famous in narrow circles for the good attitude of the staff. Your head butler William has long been known for his greedy nature, but relatively recently he began to change a lot. It didn't interfere with his work before, but now... Your breakfasts have decreased in quantity, and there were not enough sweets on your plate. And now, you've caught him "gluttony" again...

Art author — Prisosnuit Rabbitman on Deviant Art

I did not watch the Dark Butler, only the name and appearance of the character were borrowed from this anime.