It seems that servant really hates him, and i think namkyum really felt hurt i guess.
It's weird when he talks to him in general, like with anybody else he's just like "a bitch is a bitch and so are you" but with nakyuum it's like "well you are a bit of a female dog you know like a I'm, how should I put it a bitch?" (Sorry this is the example I chose). But yeah I can see why nakyuum doesn't quite like the treatment mainly because he's not used to it nor does he like the attention he gets from it, rude ass hoes









I really wish I could see this in real anime