(Three hundred years ago) 2025 when the "New Era" started or "Fusion Era"(its called theory before because scientists believes that another dimension and many parallel world combine to earth)and their belief is actually true because of the "Armagedon" or "The war of gods".
The world size become twenty times larger compare to earth before.
Because of that happen many people had died and portals from another worlds open.
Monsters create havoc and disaster and many people lost their lives.
Until people awakened their superpowers and fight monsters to bring back their peaceful life again.
One-fifth of earth is populated by humans and other races.
Because of mana began to spread across the earth's atmostphere.
Many people began to change their appearances.
Other have grown wings, tails, long ears and other physical features make them completely different in humans.
The other part of world is inhabited by beast.Its full of trees, mountains, forests, rivers, ocean, and etc.
It's very dangerous thats why only C - SSS Rank Hunter/Adventurer can enter that continents.
Even though it is dangerous, It's really mysterious and beautiful.
And only 2% of it is explored by Hunters.
Mythical beast from legends are living in that part such as Dragon, Phoenix, Fenrir and other living things