Tetsuwan Atom - episode 87 - 18 Sep, 1964

Atom exchanges messages with a star nymph, and sets out on an expedition to find the pure water the nymph needs. The star nymph is, in fact, a princess of the Planet Keios. She is trying to turn into a cocoon with pure water on a full-moon night in preparation for emergence. (Source: Tezuka Productions)