The Residuals

Throughout the course of their operation, the many worlds generate superfluous data that ends up unused and gets discarded.

This data is drawn across the expanse between worlds and accumulates, giving form to a place known to its residents as

「Remnant Central Boundary」

Due to the collision of incongruent concepts, you can never be sure what might happen next.

One thing is certain: it's sure to be a wild ride.