A magical boat ride through the night sky where nothing dramatic happens, nothing is explained, and that's exactly the point. Keroppi and friends drift through constellations in a dream that might not be a dream, and the uncertainty becomes the whole thing, you're not waiting for a reveal, you're just here, suspended in the same gentle confusion they are. It's a show that trusts you to be okay with mystery as comfort instead of mystery as puzzle.
Keroppi and his friends receive special tickets that let them ride a flying ship at night, and they set out aboard it to gaze at the constellations. Whether the friends all dreamed the same dream or truly took the voyage is left open for viewers to judge. The single-episode fantasy OVA from 1992 offers a gentle, whimsical outing with Keroppi and his companions.