Travel Through Another World and Become a Demon

A young white-collar worker in the city accidentally traveled to a foreign continent. Unexpectedly, he encountered an invasion of orcs before he could figure out what was going on here. He was as weak as an ant here. Want to survive? If you want to survive, just work hard to become stronger. Only the strong can survive in this troubled world. As he slowly came into contact with and understood the world, he discovered that it was far from that simple. Many events were connected together, and a terrible conspiracy gradually surfaced. The entire world will face a huge catastrophe, and no one can be immune. To resolve the catastrophe? Save your companions? Or let everything go back to where it started? What will his final choice bring to the world?