In the year 2035, an incident known as "The Burst" occurs at a Japanese research facility, resulting in the birth of the rapidly expanding, consuming, and self-replicating "Matter." Snaking its way through the remains of dams and military facilities in the Kurobe Gorge, the hostile Matter is besieged by task forces attempting to prevent it from reaching the ocean and mercenaries seeking the truth behind its existence. After being rescued from the Matter, Aiko Tachibana is under continual medical observation. She passes the time by making paper planes while she waits for her recuperation. The arrival of transfer student Yuuya Kanzaki, who begins to bring out a variety of discrepancies surrounding her body, soon disrupts her regular routine at school. Why is she never hurt, and why is she so strong?