Tetsuo and Yukio cross the snowfields and head towards Ao's base, "Mishima Mall." Tetsuo receives a warm welcome from the survivors as a "savior," and through his interactions with Ao and Takimura, he experiences the warmth of civilization and human connection he hasn't felt in a long time. But why is this place the only warm place in this freezing world? The secret of "a certain entity" that saved the mall is about to be revealed!

Suddenly, Yukio is attacked by snipers from afar. The group that appears is "E-RDE's Light (Vierde)," a unit of boys and girls who control monsters. Their commander, Sagami, was once a member of "E-RDE (Erde)" just like Tetsuo, and is a man consumed by a twisted sense of justice and intense jealousy. As past grudges and madness intertwine, Tetsuo and his friends are subjected to a relentless attack!