Super Heavy God Gravion

In 2041 AD, the Zeravire emerged as a new enemy, targeting and destroying military installations across the solar system. Klein Sandman, a wealthy and well-prepared individual, had anticipated this invasion and developed the super robot Gravion, powered by gravity. Eiji, searching for his missing sister, infiltrated Sandman's base and met Toga, another young man, who would join him and four others in piloting Gravion against the Zeravire threat.