If someone can cross the boundary of the world and come outside the world, they will see a huge World Tree. The roots of the World Tree tightly run through every world, preventing them from falling into the endless "darkness"
There is not only one World Tree, but countless World Trees. The original World Tree is the Creation Tree.
The will of the Genesis Tree naturally becomes the manager of all worlds, but there is only one Genesis Tree and cannot manage an almost unlimited number of worlds. "Just use my fruit to cultivate two agents."
However, the Genesis Tree did not expect that the agents it trained would never "work" and they did not pay attention to the work sent by the Genesis Tree.
Start traveling around the world and meet all kinds of people.
(Tear-jerking + different world + dual protagonists + male and female protagonists + semi-invincible)
