My Backyard Is the End of the World

What is most important in the last days? Zombies? No, there are most things without owners! What is the strongest in the last days? Zombies? No, super technology is the strongest! This is the story of an ordinary young loser who travels between modern times and the end of the world, smuggling time and space, forming forces, developing technology, building an army, and competing for global hegemony. The world's richest man? This is just his smallest title!