Super Tokusatsu Wars 2001/Story

A 10th planet has been discovered far beyond Pluto. Humanity tentatively called this mysterious planet that suddenly appeared "Number Ten." All sorts of investigations began, but no detailed data on the mysterious planet have been obtained yet. Earth continues to investigate Number Ten, but a terrifying invasion from thousands of stars floating in space is about to attack Earth. Knowing this, humanity decided to form two organizations to fight against these foreign enemies based on a United Nations resolution: the Terrestrial Defense Force (TDF) and the Space Investigation and Defense Organization (SIDO). The TDF mainly covers Earth, and SIDO covers from Mars to the edges of the Solar System. While preparing for an invasion from space, SIDO launches the state-of-the-art space fortress Nagar into space to secretly investigate Number Ten. However, contact with Nagar was lost, and despite investigations, no one found Nagar. Three years later, Number Ten suddenly disappeared without a trace. Scientists have debated the true nature of Number Ten, but they couldn't land on a definitive answer. On Earth, where invasions from outer space were beginning to intensify, TDF and SIDO were integrated for the purpose of unifying the chain of command, and various defense research organizations were formed on Earth with the new TDF at the top. However, humanity was not yet aware that the seeds of evil were beginning to sprout on the earth itself. And 12 years were about to pass...