[ There's so much he could say to that. So much, he doesn't even know where to begin.

Is anyone supposed to die?

Nanako wasn't supposed to die.

Tadashi...

Yu is silent for a long time. Longer than Hiro might even be comfortable with. Finally: ]

I won't ask if you understand the enormity of what you're saying. I know you do. I think anything like this is worth at least trying. [ He finally glances at Hiro again, after a long moment spent looking away. ] But how would you test it?