In the 15th year of the Tenmon era, Fuuma Kotarou—the fifth in a long line of fierce warriors—fought for survival in a world torn apart by endless warfare and haunted by dark, supernatural forces.

Driven by a single, unyielding resolve—to do whatever it took to stay alive—he cut down countless foes, narrowly escaping death time and again. Yet fate had its own plans: captured and executed, his life seemed to come to a tragic end.

But just when all hope was lost, a mysterious figure known only as “THE SEER OF WORLDS” reached out to him. In that fateful moment, the cycle of reincarnation was unleashed, and Fuuma Kotarou was reborn in a completely new realm—a second chance to reclaim the humanity he once lost.