I'm Doing One Punch Man in Another World

Rufus traveled through time into an old-fashioned online game "Holy Sword and Black Magic" and became a typical brainless cannon fodder villain who competed with the protagonist in the early stage. In order to get rid of the fate of cannon fodder, he built banks, opened factories, dug coal mines, and invented mahjong. Although he is the youngest and most outstanding entrepreneur in the entire kingdom, he is the author of the best-selling book "Fengdu Detective" in the kingdom, and he is the only eldest son of Sigmund, the largest family in the kingdom. But that's all, compared with the protagonist who comes from a grassroots background and has no one to rely on, but he has the halo of the protagonist... It's simply asking for death. It doesn't matter, as long as I stay away from the princess and let him be the protagonist. What! How did the weird and cold-hearted princess in the original novel turn into a slut? It doesn't matter, I can still join the ultimate villain brother! What? You don't believe in evil gods, but you believe in Huang Tian? Is it still me who you are attacking? The world is turned upside down and there is no way to save it! Where is the protagonist! Come out and save me. What? The protagonist is addicted to the novels and mahjong I wrote and has become a waste! What should I do? [It is detected that the host is in crisis, and the system starts automatically. ] Fortunately, he awakened the Kamen Rider Ability Medal Extraction System in an accident. However, looking at the strange knight medal called Zez in his hand... "I feel like he looks so ordinary and seems to have no strength. Isn't it better for Warren to feel it?"