The world is in caos in the year of 2031. Why? Dungeons! The answer are Dungeons! The dungeons are spawning everywhere in the world. But that wasn´t the terrible thing. The terrible thing is with the dungeons are that they break and release all Monsters in them. After 1 Month after the Dungeon spawned, the Monsters attack the world and kill every living creature that they see.
On March 24, the very first dungeon break happened. This made the world understand how dangerous the dungeons were and that even the army can't do anything, especially with modern weapons. Like pistols, machine guns, rockets and so on, these were useless against the monsters. But in the country where the first dungeon break happened, over 10,000 soldiers died and 2 months into battle the army won.
But the world learned fast, that none of the modern weapons are helping angainst the monsters. And that something get pulled out from the dungeons - a strange energy. And this energy circle sometimes around different people.
And after two Month of constant be exposed with the energy, they awake: as Hunters with skills and Blessings from Gods. But than everybody must report it. And be tested which rank they get. Of course alot of people try to get a hunter because you earn alot of cash from the dungeons. But the most they fake that they are hunters died in a dungeon or getting exposed with the test. Which test the energy that alot of people saying "Mana" to.
After battling in the dungeon and kill the boss monster all of the hunters that helped to fight has a chance to get a chest with a special item, that they can take out of the dungeon. Everything cant get in a dungeon, the only exception are items from a dungeon and selected animals. Pets! Only sommend pets can get along with a hunter in a dungeon.
But after afew years alot of hunter group together and tried to take over the country they lived in. But they lose after a attack from the military. And when this happend afew hunters created the "Hunter Union". And the Hunter Union controll every hunter in the world under the command of the country they are in.
Bit by bit more and more guilds was getting created. But no one try to go against the HU (Hunter Union). With countless guild and countless hunters the HU was the one who controll that the rules and the one who selling the dungeons permits.
And the dungeons that nobody wants? The HU create a dungeon raid team for this dungeon from Hunters that are living nearby. And this happend also with the dungeons that are about to break or are standing in the way of transportation and importance.
And this was passed down to the next generation. And the generations after it.