The near future, the two organizations are fighting - and Asa Shiromorishu. Asu supports the Government of Japan, Shiromorishu want to gain world domination. Both sides use monsters to fight. But Asa is created artificially piloted robots Gousen,and at Shiromorishu monsters, which they themselves become. And in the midst of one of the battles, there is a mysterious black Gousen piloted fairy Rouran that destroys with equal ease and promiscuity, and Asa, and Shiromorishu. And no one knew what a terrible secret she embodies its existence.