[Fujimaru's quiet for a few moments, both to try and figure out an answer and to let the pain in his chest fade. Honestly, the healing abilities of the people here are pretty remarkable, but he's not quite yet entirely okay.

"As far as I know." Not really a comforting answer, since Fujimaru gets the feeling that most people aren't a) from a post-apocalyptic world run by a dictatorship with scientists who have no regard for human life, and b) unfortunately well-acquainted with (the tool of) the head of said dictatorship. Again, it's unlikely that the Yao Corporation would have any connection with the Tokyo city government; the problem is that it's not impossible.

Then there's Wally's question: why? It's not like Fujimaru's circumstances are a secret, given that enough people back home know, but he's not sure how comfortable he is with talking about them—or that he won't fall apart again if he keeps thinking about this.

And so, this time, Fujimaru's voice isn't as calm as he'd like for it to be, as he's really not as together as he'd like to be.]

... It just has to do with some things that Kite said.

[Really, that sounds pathetic even to him. He should let this go (even if he can't).]

—Forget it. It's just a bunch of crap anyway. [albeit a "bunch of crap" that nearly drove him to killing himself back then.] I won't waste your time.