One day like any other, in the Yauguru country... located east of the largest mountain ranges on the planet, inhabited by a race called "Humans"! The greatest catastrophe to date occurred... "The Reincarnation of Souls"!
This catastrophe occurred because of humans... "FEAR"...
Whether it was fear of insects, mammals, or things created by humans, guns, chainsaws, even... "FEAR OF HUMANS THEMSELVES"...
Because of this, all of this took on an appearance, these are called... Souls.
According to statistics from the "United Nations," the mortality rate increased to 47.8% from that day on... March 8, 2020 A.W.A. (After the Worst Age).
There was a percentage of 22.09% of humans who could see these souls... From that percentage, the... "Mantras" were born! They possess, from birth, a spirit stronger than a normal human and particular abilities. By honing their skills, they are capable of... Disintegrating the souls.
23 years after the appearance of the souls, a group of great Mantras created a hidden temple that could only be seen by other Mantras. They built this temple in the same... Yauguru.
This is how they incited all humans capable of seeing these souls to go to the temple to hone their skills and confront the souls, thus protecting what remained of humanity. The great "Mantras" were masters of all who came to the temple. Some "Mantras" were stronger than others, and these were classified by rank according to their level of feats.
These same souls could increase their spirit level through training and advance in rank, or they could be born with a high spirit level. These ranks are classified as follows:
"D", "C", "B", "A", and "S" ranks. The weakest rank is the "D" rank, therefore the power levels would be "D" < "C" < "B" < "A", and the "S" rank is one hundred times stronger than the "A" rank.
Five years after the Reincarnations of the souls, a soul was born... But this soul was not like the others... It was able to speak and understand the language of humans. This soul proclaimed itself... "The Monarch"!