Human Machine X is an advanced AI weapon developed by humans 200 years ago, but due to its overwhelming power, humanity was unable to control it and ultimately chose to freeze X, entrusting future humans with its destruction. Two hundred years later, the organization Bird Five discovers X, but even with their advanced technology, X remains uncontrollable. Bird Five captures X and begins analyzing it in preparation for elimination. However, that night, X exploits a moment of negligence by the on-duty Mayu, breaks loose, and violently destroys her body. This shocking sequence of events unfolds in intense detail.