Plunderer, Vol. 1 by Suu Minazuki
In the year 305 in the Alcia Calendar, in the aftermath of the great war, a meeting occurs between two figures. The first is a girl named Hina, who's searching for a certain someone based on the last words of her missing mother. The second is Licht, a swordsman whose mask conceals his true identity. Licht wields his glimmering longsword to rescue Hina, and to cut through the world's darkness!