Replying...
Intro. Humanity is once again in danger of falling into the clutches of the Underworld's Empire, which was once led by the evil scientist Dr. Hell. So, Koji Kabuto piloted the super robot Mazinger Z and, with the help of his friends at the Photonic Research Institute, thwarted Dr. Hell's evil ambitions and brought peace back to the world. It's been 10 years since then... Now that he is no longer a pilot, Koji Kabuto has followed the path of his father and grandfather by starting his career as a scientist. And now he finds a gigantic structure buried deep within Mount Fuji, along with a mysterious hint of life... New encounters, new threats, and a new destiny await humanity. Ancient hero Koji Kabuto must make a decision about the future: to be a god or a demon. \[3\]

Mazinger z Infinity

@Jotaro