One day, a certain city released a video from several decades ago. Finally, humans understood why that explosion occurred, the one that changed all of humanity.,For a moment, the hall descended into chaos as questions flew one after another.,On the 7th street of 12 ring streets in the center of Brilliant City, it was bustling with noise. A group of people in black uniforms, long robes, wide-brimmed hats, and knee-high leather boots were gathered there. A circular blue emblem with handcuffs on a five-pointed star design was emblazoned on their left chest, right shoulder, and hat brim.。