[Catches his breath as it finally dawns on him what's going on here. Really, he feels like an idiot for not realizing sooner, but with everything at hand and his inexperience with anyone from Yokohama showing up here before, it hadn't occurred to Art until now.]
No. No, actually, it's something else.
[Shakily, he breathes out.] Time here... The reason I said those back home won't notice our absence is because it's possible to come here from different points in time. And upon returning, you would go back to the same exact spot, so to speak.
That... must be different for us, if there's things you know that I don't. [Like pretty much everything you just said, what. He looks different? Murasaki? That?]