"A long time ago, during the time where the gods dwell together with man, a conflict occurred with the two primordial gods, the goddess of life and the goddess of death. It was an unknown conflict that no one knows who started the conflict. However, the followers of the Goddess of Life are all blaming the Goddess of Death though there are no shreds of evidence that she was the one who did it. Even the followers of the Goddess of Life had no idea what the conflict was and were just blindly siding to the goddess they believe in the most.
The Goddess of Death decided to silently take the matter so that there will be no more conflict. However, the followers of the Goddess of Life oppressing the Goddess of Death's followers and accusing them of colluding with the power of darkness to bring forth evil in this world, which finally triggered the irk of the Goddess who governs the realm of the dead.