Emon wants to become a space pilot, but in the 21st century he learns he is the only heir to the Tsuzureya Inn, a rundown hotel in Tokyo that has belonged to his family for years. Seeing that Emon is easily swayed, the owners of the Galaxy Hotel chain offer him a holiday in space, hoping to lure him away from his inheritance. Through his troubles, he gets help from the robot Gonsuke and the small alien Monga.