[Well. Let's be real, Carlos has a tendency to somehow expect the opposite of reality from Junpei and Akane? So he does make a small sound of surprise as he goes to fetch the milk and sugar.]

Heh, you and Akane keep surprising me.

[Which is to say, he totally expected Junpei to take his coffee black... It's clear from his tone that he doesn't think it's a bad thing, though. Either way--]

... Could be. Do you have the piece of paper with you? I don't have the book.