The Moon Tribe was a civilization in which had been cursed due to the fact that the people had made covenants with Yami, the Lord of Darkness. Yami was evil-spirited, all he ever thought about was getting revenge on the gods and blackening the future of the mortals on earth. The Moon Tribe was in need of someone to take control of their land, a ruler to set things right. Yami had found them living in fear and pain, and he offered them as their ruler, only if they agreed with his covenant. The covenant was to make the Moon Tribe supply his demons with weapons and obey him while he himself protected them from harm in exchange. Ever since then had the gods feared the tribe. Disgusted by their actions, the gods had abandoned them and grew hatred upon the tribe.
A thousand years later, the Moon Tribe felt as if they could take care of themselves and broke their covenant with Yami. Yami was enraged when he heard of this and decided to summon one of the largest and strongest demons of all time, Orochi-no-Yamata, the eight-headed snake. The snake was to destroy the Moon Tribe, to kill every living person standing on the moon's surface without any warning.
The gods watched in despair as the snake tore apart the moon. Of course they hated the Moon Tribe, but they knew too that the tribe just needed a little control to set things right. Yumigami, the moon god was still a newborn child and so the tribe disliked him and refrained from worshipping another god that had nothing to do with them. The gods warned them that they will be abandoned if they do not choose to side along with the gods. Stubborn as the tribe was, they agreed not to side with them. And it is now the Moon Tribe lay completely helpless, each member dying one by one from the evil, screeching snake.