The Hero and the Sage, Reincarnated and Engaged

Story:

With their nations in conflict, the Hero Reid and the Sage Elria had long been on opposing sides of the battlefield. However, it would all come to a much too sudden end with the Sage's passing. Single-handedly breaking through the enemy ranks to see Elria one last time, Reid meets his own heroic demise... But then, he opens his eyes as a newborn a thousand years later, getting another chance at life…and love?!