In the mystical realm of Tenchikyu, where gods and demons walk among mortals, and the pursuit of immortality drives the greatest cultivators, Akira Sato awakens with a jolt. His eyes snap open, revealing not the familiar ceiling of his Tokyo apartment, but a canopy of shimmering leaves pulsing with spiritual energy. Confusion gives way to a flood of memories – not just of his life in modern Japan, but of countless others stretching back through the ages.