On Becoming the Prophesied Savior to Save Another World

A prophecy that spans time and space draws the protagonist from his original world to a different world in another time and space. At that time, the other world was in panic due to the shadow of the Demon King. The protagonist became the only savior in the prophecy. He continued to grow through unknown magic and war, met partners who fought side by side, and traveled through the desperate situations and dangers of the other world. He was bound to kill the Demon King and rekindle the light in the other world.