So if the box is opened, the world gets destroyed. If the box doesn't open, the world is good. So the destroyed world outside the box got swapped with the good world inside the box. I think?
Also Gaia being concerned that "flat crust is embarrassing" is just cute xD.
“Had we met under different circumstances, we surely would’ve fought to the death.” The Unlimited Blades Works reference!!
Also I’m tearing up at Miyu and Illya’s conversation. 🥹🥹