[ He nods agreeably, since at least luckily this isn’t Victorian England where he’s pretending to be a butler, so. He has no problem with being a little more informal, at least by such standards. ]

Matsui, then. It is a pleasure.

[ Sebastian’s polite smile warms again as they move past introductions to return to a nerd’s real passion: books ]

So indeed. Especially so when we have diverse interests, yes?

[ Which, pick one and Sebastian probably knows which is exactly why he turns the question back to Matsui ]

Well, other than matters of blood and medicine, is there anything else that catches your interest, speaking of?