An ordinary high school sophomore. Because he walked into a coordinate on this earth that he was not supposed to have walked through at that time. So his fate changed. The God's Key "Longis Gun" joined his body in the form of a soul. Shrouded in the mysterious power, before he knew what happened, someone told him, "Your life as a human being is over." And this person turned out to be his own high school classmate Kang Naer. He could still live normally in this world, but he entered an organization that uses calculation as a means and for the purpose of confrontation... What are the goals of these organizations? . The cruel reality is placed before his eyes. How will he take his future path?