Mars

Mars (マーズ) is a sci-fi series by Mistuteru Yokoyama that was serialized in Weekly Shonen Champion from 1976 to 1977, lasting for 5 volumes. It focuses on Mars, an amnesiac boy who was discovered on a volcanic island by a news reporter, only to learn that he was an alien with a mission to destroy the Earth if humans obtain weapons of mass destruction. Determined instead to save the Earth, Mars rebels against the aliens that gave him his mission.