Death March to the Parallel World Rhapsody, Vol. 15¿ (manga)

Satou-s epic battle against the Demon Lord rages on as he endeavors to eliminate the source of the fiend-s power, and revenge is far from his only motivation to defeat his foe. With images of Sara-s lifeless body flashing through his head, Satou-s mind turns to resurrection-and he-s got no time to waste if he ever wants to see her again...