Super Heavy God Gravion

In the year 2041, a formidable threat known as the Zeravire emerges, wreaking havoc across military bases throughout the solar system. Anticipating this invasion, the affluent Klein Sandman has been secretly assembling a force to counter the impending chaos. At the heart of his strategy lies Gravion, a colossal robot powered by the unique energy of gravity.

Amidst this turmoil, Eiji, a determined young man searching for his lost sister, infiltrates Sandman's base. There, he encounters Toga, another young recruit who shares his resolve. Together, they join forces with a diverse team of four others, uniting aboard the mighty Gravion to confront the Zeravire menace and protect humanity from annihilation.