Shigeru Mizuki's debut work as a manga artist and was released as a rental manga. Dr. Uetsuto departs via rocket to investigate a second moon that appeared in the night sky, but the rocket is sabotaged by his rival Dr. Dorai, so it crashes and Uetsuto's corpse sinks to the bottom of the sea. However, right before the crash, Uetsuto came into contact with a mysterious being named Guraya who enters his body like a parasite, causing Uetsuto to later resurrect and with superpowers. Uetsuto becomes the mysterious hero Rocketman and battles against Dr. Dorai's giant robot Neo-Dorai. (from gegegenokitaro.fandom)