Seventy years ago, a "Crimson Starfall" streaked across the sky and crashed into Earth. For the first time, humanity encountered a higher-dimensional energy known as "spirit matter." Some people awakened as a result, gaining the ability to control it. They came to be known as psychics.
But psychic power is a double-edged sword. Every use carves an "erosion mark" deep into the soul. Once the marks accumulate past a critical point, a psychic mutates: their body disintegrates, transforming them into monsters that roam the human world, known as Void Beasts.
To survive, the nations united to establish the "Spirit Nexus Court," which oversees psychics worldwide, issues licenses according to threat level, and enforces monitoring of erosion indices. On the surface, psychics are social elites and weapons of the state. In the shadows, a struggle over "immortality" and "world destruction" has never ceased.
