In May 2027, a huge monster suddenly appeared on the peaceful earth. The National Defense Forces responded quickly, but due to the disparity in strength, the earth suffered unprecedented destruction.
In June of the same year, various countries united to form a temporary defense organization, Team Tucker, which used the most elite weapons from each country to alleviate the monster disaster.
In 2028, the mastermind behind the scenes, the different-dimensional person Yabo, appeared for the first time, announcing that the earth was qualified to be his experimental subject for revenge, and intermittently released super beasts to destroy buildings.
