Retribution by the Survivor Knight

Masato Hirose was born a Kriegerin, someone who can manifest a weapon from his soul. When he was 13 Ito Yuuto united most of Estral with the goal of unifying the world by force. Masato's father was placed into the Royal Order, the highest-ranking position in the military, as a result, Masato has spent the last 3 years of his life training to become a special forces operative and he was assigned to the 12th Special Operations Division, where shortly after tragedy struck leaving Masato as the only survivor of an operation within the Escaran Territory. Masato was reassigned to the Wilhelmshaven Military Academy to teach him how to deal with others who are his age. Masato's only goal is to serve the King and to avenge his comrades by completing the unification of the world.