Three boys—Kotaro, a ninja in training, Rikiya, a training baseball player and Yosuke, a studying scholar—were living normal lives in Aozora Village. One day, Kotaro, along with his father Tobe, ...

The Kikaika (literally mechanization) Empire invades our solar system, and in a matter of moments they take over and convert Neptune, Uranus, Saturn, Jupiter, and Mars, and set their sights on ...