The main character is a scientific genius boy named Kiteretsu, who has built a companion robot named Korosuke. He frequently travels in time with his friends and Korosuke in the time machine he built. Miyoko is a girl in his neighborhood who is basically his girlfriend. Tongari is his rival, who happen to share some similar traits of Honekawa Suneo. Buta Gorilla is a typical neighborhood bully, who also share similar traits of Gian except that he often antagonizes Korosuke (though they are in grade school).
Yuji Mitsuya
Mami Koyama
Chieko Honda
Naoki Tatsuta
Toshiko Fujita