Nature is in agony, the flora is losing its colors and the agriculture never been so low. The media calls it the Wilting and it's a slow end for the world.
Many people feel that the gods themselves backfire on humanity, they are right. Ancient gods from various mythologies decided to punish humanity and to slowly erase them with the ambition to purify the world.
Luckily, not all the gods want the end of the human race, some deities choose to fight against the Wilting but their only chance it's to act in the human world itself. It's why they reincarnate into humans, losing their memory but not their powers. Since the start of the Wilting, thirty years ago, we are starting to see simple boys and girls with the capacity to transform themselves into a god-like form, a Deity, we call them the Heirs. They have enhanced physical abilities in addition to their divine powers, making them the perfect fighters. They will fight against the other gods' armies whether they are spirits, demons or even humans. The majority of the Heirs, as a distant descendant to a devoted believers like an oracle, a shaman, a priest or even a king, are chosen by their Deity and born with their power. If not, others were given their power as the Heirs can give their Deity to someone else but only right before dying.
Not only the Heirs are in the front of the line in this fight for the humanity, multiple governments ally their force and formed the Primordial Program. The Primordial Program is an intergovernmental operation with the aim of unifying the Heirs, finding them around the world, and stopping the Wilting. They assemble the Heirs in their headquarter in Tokyo where they learn to fight and use their power.
Unfortunately, on the other side, there is The Eighth Seal. A sinister cult composed of powerful people waiting for the divine purification of what they call a "corrupted world". They are the allies of the Wilting. Their aim varies between the members, if some of them want to help the Ancient Gods to gain their favor, other wants to become one of them. As the Primordial Program, they seek for the Heirs but manipulate them to become their weapons. There are the first enemy of the Primordial Program, the Ancient gods' servants. As an occult organization, The Eighth Seal performs devastating rituals from various ancient religions. They learned to manipulate the power of the Heirs and how to transfer a Deity to a Heirs from another person.
My oldest friend, I guess, knowing you, that you have resentments towards me, towards what I did, I should share with you my choices but it was my burden and I did not want to inflict that to you. The world is dying, they call it the Wilting, I find this name suitable, the earth spirit is in agony. The peoples are destroying their history, their precious belief. What do we become? There was so much richness through all the ancient civilizations. Remember the Greek Parthenon, the Eastern Temple of the Original Vow or the Naqa...
The ancients gods are manifesting their wrath for us, imposing upon us this perishing landscapes... But I don't want to let these gods decide our future. I will fight for the life, for giving to humanity a second chance. I have powers in my hands, I am an Heir, it feels like an incandescent fire warming my heart. This power tells me that some deities are on our side and I want to be part of their prophecies."