In the pure home of the Shishigami clan,Kuro and Keita prepare to face Reishin Shishigami and stop him before his terrible vision for the future is realized. Though the rise of mototsumitama and humans to a position of power over the rest of the world's creatures was largely spurred on by the interference of the genuine one Thousand, Reishin's plot to cut one third of the human population is too cruel to bear! But Reishin has found unexpected allies who share his perception of the imbalance of the world-the ancient genuine ones themselves, the original keepers of Earth! With such mighty foes before them, do Keita and Kuro have the strength to change the fate of all mankind?!