This impact destroyed human civilization, society, and nations. In such adversity, the resilience and tenacity that humans have developed over millions of years of evolution finally came to the fore. The surviving humans gathered together and, in incredibly difficult circumstances, built isolation barriers.,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.,With a deafening boom, chunks of black shields rose up, and in the blink of an eye as the burly man waved his hand, a trail of flame shot out, soaring into the sky. The flames drew gasps from the onlookers gathered behind the police officer.。