[Arc 1 of 3 Multi-Terran Wars: When Universes Collide] A mysterious gate opens in the Ginza district located in Tokyo Metropolitan City, the capital of Japan. From inside the gate, a group of foreign soldiers in a military uniforms from the Roman Empire began swarming the city of Tokyo to kill and kidnap civilians in the city. Fortunately, the Japan Self-Defense Forces quickly fend off the "alien" invasion with the help of the Tokyo Metropolitan Police Department and the Special Attack Team. With that, the attackers reentered the gate, and the Japanese managed to capture and kill several of them. Little did the assailants know that they had revived Japan's peaceful military since 1945. But not only that, other nationals captured by soldiers from other worlds were only identified as Americans, Russians, and Germans. This of course got the United States, the Russian Federation, and Germany involved in this war. But surely in the future many countries will join, either because their people are also kidnapped or just volunteering to help because they know that this is more like an "Inter-Universe War", who will let their world to be attacked by Another World? What we don't know is... this is the beginning of... "Multi-Terran War" [Fanfiction.Net and Wattpad versions are a little bit different!]