Origin: a World Within a World

The formation of the world is unknown to anyone and is extremely mysterious, but there are endless dangers behind it. The energy of the universe is vast, but the things that can activate this power are some simple and unique runes. The runes cause a cosmic war in which no one wins. The survivors sealed the runes, and within the seal, the power of the runes began to truly burst out. The unexpected connection between the sealed space and the subspace prison eventually led to the formation of a world outside this world, a world within a world. Originating from the mainland, everything is animated and prosperous, but there is a conspiracy hidden in the secret, originating from sinful desires outside the world.