[ A normal person would probably be a bit embarrassed about meeting anyone again that they had met in such a state of undress, but... Not Sebastian, apparently. He doesn't even seem to remember it with how casually he acts, but that's less elderly forgetfulness like some people and more a true lack of shame on Sebastian's part. Still. It's rather useful when it comes to things like this.

As Mikazuki grabs his attention, Sebastian looks up from his work with a polite smile at first. Being called a butler as if it were his name makes him laugh, and he offers his name gently after. ]

Well, whatever you would like, really. But my name is Sebastian Michaelis, if you would instead prefer that.

[ He doesn't particularly care either way, in truth. It's an assumed name, so "Sebastian" is just as good to him as "Butler-kun." Or, well, mostly. He'd prefer the former if only because it's more dignified. ]

...Ah, but yes, of course? [ There's a slightly wary tone in his voice as he answers, though. ] What is it that you need, Mr. Mikazuki?