The system set up to preserve and protect has become a wasteland of battles.

To many, becoming an Onmitsu means fortune and fame. What the recruitment posters leave out is the brutal reality, blood-covered hands, merciless fighting, and a death that hovers, waiting to embrace even the boldest warriors.

A scuffed, twelve-year-old foreigner arrives at the militarized gates of Ojika alone. He carries no family name, no credentials, and no wealth. All he possesses is a clinical, unblinking calm, a hyper-observant eye, and training that should be impossible for a boy his age.

Slotted into an elite academy team alongside two conflicting prodigies and a brilliantly lazy mentor, he must survive a series of grueling tactical trials. In a profession where your ultimate duty is to die protecting the state, a rookie squad must either forge an unbreakable synergy or join the quiet aftermath of the wreckage.