It is unknown when it began, nor from where it spread, just that one day, a rumor suddenly circulated across the mainland.
Legend has it that the world of is not just a single mainland—far across the distant ocean lies another land inhabited by humans, and on that land exist as well.
However, for some unknown reason, the on the main mainland are unable to communicate with those on the other land... Only when the exploration level of the main mainland reaches a certain degree will a path connecting the two lands appear.
And there's another legend.
Legend has it that the born on the mainland across the ocean come from another world...
...
...
