Okita-san. [Yamazaki bowed--it was only appropriate. Okita outranked him, he now knew. He hesitated slightly before speaking, but then got right to the point.]

We've both recovered our memories, it seems. And... I suspect that you remember things that, from my perspective, haven't yet happened. [He paused, looking Okita in the eyes.] We're from different points in time, aren't we?

[It explained why some of Okita's memories that they'd discussed had seemed so odd. It explained why Yamazaki had no recollection of the man being ill. He hadn't been ill... at least not enough for it to have been apparent.]