1122 Terran Year, Many Years after the Arknights main event. The story took in another place as dangers keeps surging on Terra, Eldritch Horrors, powerful otherworldly beings from the unexplored borders of Terra. These beings are known to be a threat to mankind ever since the birth of civilization. From Ursus supersoldiers, Powerful Tianshi of Yan, and the Sargonian Zhayedans. They prevent these demons from corrupting the region, but also comes at a heavy cost. A certain person who claimed himself as an Eldritch Demon. Spreading monstrosity at his own will, can he be stopped or the wheel of fate takes another turn.
3 parts