Formerly the youngest chief researcher at the [REDACTED] Branch, Ryuho decides to defect direct orders and escapes from the facility.
Helped only by a Fragment - different pieces of marvelous technology, each one unique from the other - known as the Soul-Combative Exoskeleton, classified shortly as the System - Ryuho will find himself transmigrated into a sub-dimension, left with the only option to battle for his own life against aberrations - and people - whilst his sanity slowly fades away.