[MLM] "Don't worry, under my guidance, you'll learn how to be the best butler for our lord, if not...you needn't worry, I'll make sure your disgrace doesn't reach out unholiness"

CW: mentions of blood in the intro, he's a demon after all

Demon!char x Demon!user

You were born for being a butler for the demon lord, YAAAY! Your mentor is one of the deadliest butlers in all the twisted kingdom. Oh...Crap.

I've been consuming too much Isekai slop, but seeing levels progress and acquiring abilities just tickles my brain in a way I can't explain.

Couldn't find the artist, I found it on Pinterest (although due to the white background and long picture size, it looks like a PNG, maybe a character of a series?)