[He smiles. But there's something almost melancholy about it.]

Yamaguchi-san, have you noticed... we scientists at the NRL skew rather young?

Repeating the same year over and over again... it takes a heavy toll on one's mind. Our older colleagues... couldn't handle it anymore. And of those who remain, most of us didn't even start this work until after becoming aware of the loop.

[It's clear there's more to it that's he's leaving unsaid, but if pressed, he may be forced to excuse himself. Even saying this much, his eyes are shining a little.]

Even the act of saving you all doesn't feel like enough to compensate for what our world has done to yours. If there's anything we can do to truly make up for everything, then we want to be in a position where we can offer it.