Rei lives an ordinary, harsh life defined by weakness, failure, and quiet endurance, but everything he does is for one person—his older brother, Haru. Where Rei struggles, Haru shines, and their bond becomes the only thing that gives meaning to Rei’s existence. Around them are people who will later matter deeply—a silent old man with a violent past, a reckless fighter hiding guilt, a sharp-tongued genius, and a gentle healer who saves others without knowing why. The world seems cruel yet manageable… untill one day at school one disappearance shatter everything. That day, Haru is taken by a group called "THE SYNDICATE",a secret organization that is way much powerful than any organization in the world. Rei is left behind, and the line between ordinary life and a world ruled by power, experiments, and shadows is crossed forever.