Faced with the threat of extermination by the appearance of the evil Hydra, the heroes of mankind called upon the powers of the mystic Kaguya to travel back in time. After saving their friends, they were finally able to amass enough strength to face the Hydra.
After successfully defeating the Hydra, they promised to live together in peace within the world created by Orochi, and returned to their various homes.
However...
As the heroes looked to forge new lives for themselves within this strange land, a group of individuals heard a "voice" emanating from a mysterious stone, calling for a return to the chaotic din of battle...