Kamen Rider X Sailor Moon: Return of the Showa Riders

After all the Kamen Riders put an end to Crisis Empire, the peace has been restored once again. Few years later, a young man named, Christopher Brandon, may be continue his job as a helicopter pilot, but for now, he became a professional motorcyclist where his goal is to win a Grand Prix. However, a new evil organization has arrived and once again, they're going to abduct every people around the world, plotting for world domination. Then, there are five schoolgirls who gear themselves up to stop against the organization's malicious plans and they are... the Sailor Guardians. And for Christopher, he thought that everything was over just because he defeated Gorgom and the Crisis Empire. So, Christopher prepare himself as he became the Kamen Rider Black RX once again. With the return of his predecessors, they will help RX and Sailor Guardians, to defeat the organization, while also protecting the citizens of Japan.