After Mebius defeated the Alien Empera, Earth enjoyed more than twenty years of peace. Then the Land of Light received a message that Earth was about to face a tremendous crisis and needed massive reinforcements. The source of the message, however, could not be identified. The Land of Light therefore decided to send Mebius to Earth first. Meanwhile, in China, researchers had independently developed Star Leap technology by combining alien technology with that of a mysterious third-party organization. They brought it to Japan's GUYS for a technology exchange and further development.
