In the 22nd century, Prof. Kagami creates a time machine. Due to an incident, however, he leaves his only son in 19th century Tokyo. His son is taken in by a pickpocket named Konnyaku no Oden, who names him Komasuke. Komasuke's parents locate him, but realizing the futility in separating him from Oden, decide to return to the future - but leave behind a book describing a future world...

Volume 51 of the Osamu Tezuka Complete Works