I rather liked this chapter for its crystallization of Yutaka's character. He had the perfect excuse to not have to bother with any of this anymore--not only is his life shortened every moment he spends with Aru, but Aru herself was happy to let him go, for the sake of not hurting him any more than she apparently has. And yet he still chose her. Sure, yes, "everyone would die if I didn't", but it's been established that everyone will, regardless of his choice in that moment. Meaning that "two to three years" spent living with Aru were better in his mind.
Just nice to see that his feelings toward her are growing. I hope it's not going to be a case of "oh well the foreign bodies within me are what's attracted, it's not me", though I could see that being a line down the road. But things are building between them, and that's what I choose to focus on.
Interesting bit from the Leader of the System, though. Aru is still being treated as an apocalypse first and foremost, which is entirely reasonable, and hoping she ends her own life and that not also spelling doom for humanity is a perfectly sound line of thought to have. But it adds some nice texture to the personality and perspective of the various characters, who are walking this line of very real danger. It'd be easy to just make them villains or to make them swoon over and strive to protect Aru (and Yutaka), but this sort of detached, wary nurturing of the two is a neat middle road.
It'll be fun to see whether any sort of breakthrough is made that saves the world and Aru & Yutaka. Though I do think this will have a "tragedy" tag at some point, and will be a fantastic story for it.
Thanks for the TL.