The series takes place in a near-future world where the line between humans and AI is blurred. A single incident triggers a rapid biological evolution, akin to the "Cambrian Explosion." This event sparks a new struggle for supremacy, with the effects of this evolution extending beyond biology to encompass various materials and technologies. An era of massive evolution involving diverse entities, including humans, machines, and biotechnologies, is approaching. In this world, the characters wage an existential war.