~Ah… Sorry, sorry, really truly.

Whatever. Have you figured a way out?

This is the first I've ever heard of the World of Reversion too, but thinking in terms of what I do know…

The laws of nature are absolute. They cannot be so much as bent.

A living person absolutely cannot enter into the World of Reversion.

And yet…

Merudina's singing is audible to everyone, correct?

But to someone on this side, she is invisible.

When the Moon sets, Nayukis becomes invisible and inaudible as well.