AD 199X, Tokyo. Four giant meteorites appearing out of nowhere crash on the city, destroying much of it. Thirty years later, Tokyo has been completely rebuilt under the name of Megalocity, enojoying a high level of prosperity and technology. However, the city is often under attack from extradimensional creatures called Youmas, that seem somehow linked to the accident happened thirty years before. While the city police seems mostly helpless against those creatures, a group of cyborgs known as Borgman, Ryo Hibiki, Chuck Swegger and Anice Farm, fight off the Youmas using powered suits called baltectors. With the help of the scientist Memory Gene, the Borgman try to stop the Youmas and their enigmatic leader, Gilbert Mesh, from taking over Megalocity.
Shinnosuke "Shin-chan" Nohara is a little boy who seems to do everything he can to annoy his parents and teachers (and succeeds wildly), but only means the best. He just tries to have a good time and in doing so does things which will create the maximum vexation in others.
Sent to jail after being accused of murdering Getter Robo creator Dr. Saotome, Ryoma Nagare must once again team up with his former comrades and pilot Getter Robo when Saotome returns from the dead and threatens humanity by unleashing his greatest creation - the Shin Dragon. Their efforts, however, are in vain as they fail to stop a nuclear warhead from hitting Shin Dragon, resulting in a massive Getter Ray contamination that wipes out 99% of the planet's population. Thirteen years after this great catastrophe, mankind continues to fight for survival against the Invaders. Out of the remains of the nuclear blast comes Shin Getter, piloted by the artificial human Go. With remnants of the Japanese military by his side, Go - along with co-pilots Kei and Gai - must use Shin Getter to exterminate the Invaders once and for all.
Tentai Senshi Sunred is a powerful, battle tested hero of many years. He has sold his super bike, which is seen in the opening credits. Now he smokes a lot, is effectively unemployed, and lives by the grace of his girlfriend, Kayoko Uchida. His arch enemies in the Evil Florsheim Army are still trying to take over the world. Under the direction of their local leader, Vamp, they help members of the community, run a cooking show, assist Kayoko Uchida whenever possible, and try to attack the ever powerful Sunred. All in all, a light parody of the Japanese hero genera.
This OVA is a parody of the popular japanese Tokusatsu (Power Ranger/Ultraman genre) franchise Kamen Rider. It features all of the Kamen Riders from The Original to Shin (Shin only makes a cameo). See More Info for a more detailed synopsis.
In the Warring States Period of ancient China (475-221 BCE), Shin and Hyou are war-orphans in the kingdom of Qin. They dream of one day proving themselves on the battlefield. One day, however, Hyou is taken to the palace by a minister. Winding up on the losing side of a power-struggle, Hyou manages to return to the village, barely alive. Shin then meets a boy who closely resembles Hyou, Ei Sei. For now he is the king of Qin; later he will become the emperor Shi Huangdi.