The story tells the adventures of the boy, 21 emon, engaged in the management of a hotel belonging to his family for years. In his problems, 21 emons is helped by the robot Gonsuke and the little alien Monga.

• Shogakukan
• TV Asahi
• Kazuhiko Inoue
• Tadao Futami
• Yoko Kuri
• Kaneta Kimotsuki
• Kazuko Sugiyama