In the year 22XX, due to the drastic decrease in the human population, the government starts accepting races from other allied planets. As a result of genetic mixing, new species are born with special powers. A young man named Yuuki learns on his 18th birthday that while his father is a member of the "hero" tribe, his mother is a member of a tribe of beings who can manipulate plants who were supposedly wiped out due to the accelerated mechanization of the planet. As a result, Yuuki holds powers of both tribes, but he questions which side he should help with his powers.

Ometeotl Hero

It is the near future, in the 100th year of Showa (year 2025). The population of world is more than 10 billion, and a world-class space development project called "Mars Terraforming Project" is in process. One day, a spaceship "Izanami" crashes in Japan on the way from Mars, and it revives the monster Negadon, which was captured by the spaceship.  Can the human race knock down the monster !?  Under the desperate situation, a middle age man Ryuichi Narasaki rises up against the monster. He is a robotics expert  who lost his daughter in an accident during his experiments.  Now, the desperate struggle between Narasaki and Negadon begins!!

Negadon: The Monster from Mars

In 2047, an unknown, alien lifeform descends upon the Earth, destroying all the major cities in one fell swoop. The survivors unite and build a Diffusor to stop the Februus, the invaders the military would later codename the FOS, and a temporary peace is achieved.  Jump forward to 2053, the present. A last, desperate counterattack is being mounted against the enemy. Hiroshi Akishima, soldier in the Planetary Defense Forces Alliance, would like nothing better than a shot at the aliens responsible for his father's death six years ago. However, the new offensive requires the Diffusor to be dropped, leaving the entire planet terribly vulnerable once more. Will humanity regain the stars or lose everything in the final, ultimate gamble?