Create a perfect civilization in a perfect demiplane world ... invite a bunch of humans and others to come live in that world...
What could happen?
Gee. If it involves Humanity, I wonder ...
@SA2011 Well I guess we know what the mangaka was watching while coming up with this. Yare yare.
It's not just the Japanese who leave shoes at the entrance... It's the cultures that don't that are bizarre. You've walked all over filth outdoors,candy then you stomp inside with that? Even jump into bed in shoes?! Mind boggling especially during the pandemic.