*Note: this manga was published in Shoujo Club between 1940 and 1942. Its serialization was interrupted during the war, and restarted in Shoujo between 1949 and 1951. A single volume reedition of the tankoubon was issued in 2001.*

On the planet Radion, representatives from many worlds have gathered to make a choice: do they allow Earth, who still believes they are the only intelligent life in the universe, to join the Galactic Union of Worlds? Many are skeptical, so a plan has been devised: Prince Planet, a Universal Peace Corps member, will travel to Earth; and disguised as a normal boy, he will help fight evil and injustice and help instill a sense of peace with the Earthlings! Alongside trusty friends, Prince Planet uses the power of his pendant for the greater good!