( Though Mika believes Yuu capable of so many great things - on this, he concedes, nothing can be done; not even by Yuu, and all his blinding, beautiful hope. They're just kids. And if Yuu can do nothing, then - no one can. (In this heliocentric way, Mika fixes Yuu at the centre of the universe.) So their world, too, would decay.

He can only wish he could rescue Yuu from it. That - Yuu had been placed here, instead of him.

(... Perhaps...?)

But on this topic, Mika seems to not need to ponder. )

... Nothing. Humans can't look beyond themselves.

( They can't see the forest for the trees. A child who sees the beauty in love and nature grows up to see a man who sees love as a tool and the natural world as fuel.

If humans could change, Yuu could do it. Yuu could not do it. So it is not possible. )

They will undo themselves, eventually, and in every universe. In mind, that came already: their greed led them past every warning sign that told them to stop - and by their own hands they brought about the world's end.

Some few humans remain. ( Hence the urgency of the vampires to preserve what they could. ) But not for very long. The apocalypse and tangible extinction of their kind has not deterred them at all; it's only hastened them, made them selfish at a quicker pace. They steal and kill - they tear each other apart - experiment, and indulge their worse desires.

If their better halves can't touch them, and self preservation can't touch them, and death can't touch them, what else is left to move them?

( Nothing. And so they return to Mika's answer. )