God of War in District 5

In addition to humans, this continent is also home to monsters. The rulers of the empire isolate their compatriots beyond high walls and become nothing more than tools to delay the monsters and serve as cannon fodder. The protagonist lives in District 5, which is facing sacrifice by the empire. His ideal is the same as his grandfather's when he was young: to climb the high wall and give himself and his family a more stable life. As the protagonist grows up, he gradually understands that no matter how he climbs, fate will still reincarnate... So he turns around and faces outside the high wall.