The place used is arguably the same parallel space also called the earth, all history is the same as the real earth but there is a very big thing that has never happened on earth actually namely the event of mass destruction in 1420 which made the human race threatened with extinction due to foreign objects from outside the earth that fell into the sea which resulted in shock waves that are very strong to the cracks in the atmosphere and core of the earth.
Of the 2 trillion people that year that survived, only 120 million people, although it was very damaging to the human population, but there are enormous benefits brought about by the destruction, humans have hidden powers that could potentially become supermen with different powers, whether after the destruction of the human being back in harmony? no, because that is why humans generate greed for power and status by absorbing other human forces, the way they are absorbed is to kill and take the core of power called the source of resurrection.
Because of the thirst due to this power, humans are confronted again with war, each region has a very strong leader and all of it is divided into 4 major kingdoms namely the Kingdom of Agnistia led by King Raymone who has the power of using Fire, the Kingdom of Oura is led by King Dope who has the power of ice, the Kingdom of Mino is led by King Naro who has the power of metal, the Kingdom of Pore is led by King Yuri who has the power of sand.
4 The kingdoms fought each other to prove the most powerful kingdom in the world with the selfishness of each king who ignored the death of the human race caused by war.
But did one of the kingdoms succeed in becoming the strongest? No, Because there is a mysterious person who somewhere appeared destroying the four kingdoms with very strong power, but after the destruction the mysterious man disappeared as if he never existed.
after the event that was considered to be the pain of the human race was finished, the remaining human race returned to its original state where the power carried by a foreign object disappeared, generations from generation to generation passed and all the history of the event was hidden or kept secret by the present state leaders.