[ Sebastian is still puzzling over this a bit, but even though he's definitely still trying to think through it, he's also incredibly polite. So when Hiro asks a question, even indirectly, it's his duty to answer it! His hand falls from his chin, and he nods. ]

Well, to say I live in it is somewhat presumptuous of me, I would say... It is where I work, for I serve my master as the head butler of his household.

[ But he does totally live there. But his work is more important to him than anything else, so it's why he answers a bit oddly. ]

Though not that it would matter here, I suppose. It is certainly no place for the manor.