The world we live in is called Earthside in this story. There are the other worlds called Nosfertia, Heavenstia, and Eternalia. When Darknoids from Nosfertia begun invasion to Earthside, Heavenstia sent 3 Animanoids (beast-humans) to prevent it. The lead character Touya had believed that he was a mere human but found he was actually a being of Eternalia. With the help of 3 Animanoids, Touya fights to defend Earthside.

A recap OVA that portrays the second half of the series Heavy Metal L-Gaim. After the credits, there is a short clip animated for the OVA entitled Pentagona Dolls, which is intended to be comic relief.

In the 22nd century, there are no longer any world wide wars. Instead, small scale wars break out all over the Earth. Meanwhile, a large robot appears who protects the weak. It is called Dancougar Nova. Some even call it God. However, no one knows the reason for its existence - not even its pilots. Then, another robot, beyond anyone's expectations, reveals itself as the true enemy and begins its attack on the Earth. Dancougar Nova retaliates against this enemy with a power that was kept secret until now. Will Dancougar Nova be able to save the Earth? The prelude to this explosive confrontation rings out. (Source: AnimeNfo)

In the distant future, humanity is hurtling down a path of ruin. Global environmental destruction caused by chemical contamination, radioactive fallout, and UV rays coming through the patchy ozone layer has lead to deterioration of the human genome. (Source: Official Website)