Genma Wars (幻魔大戦) is a Japanese science fiction manga and novel franchise that began in 1967. It was a collaboration in Weekly Shōnen Magazine by science fiction writer Kazumasa Hirai and manga artist Shotaro Ishinomori. It was adapted into a 1983 anime film, a 2002 anime television series, and a 1983 laserdisc video game called Bega's Battle in North America.
Plot
The series tells the story of the battle between the Earth's defenders and a demonic entity named Genma Daioh. Its first protagonist is Jō Azuma, a Japanese high school student of the 1970s who suddenly finds out he has psychic powers and is being called along with other psychics around the globe. They are gathered by Vega, an alien cyborg warrior, and Luna, the princess of Transylvania, who have discovered the presence of Genma traveling towards the Earth with the intention to conquer it. In order to stop him, Luna and Vega train Azuma and all the other psychics to defeat Genma and thwart his destructive plans. However, despite initial victories, the manga ends in an ambiguous cliffhanger, hinting that the psychics are defeated and the Earth will be destroyed.
After the premature end of the manga, the story was expanded upon by other series of the franchise, featuring time travel and battles in other realities. This is first shown in the sequel New Genma Wars, which takes place in 1999, after Genma's victory has turned the Earth into a post-apocalyptic wasteland ruled by the demon (although possibly an alternate continuity to the original, given that Jō Azuma doesn't seem to exist here).