Tom of Droppy has Atom in a time before his creation, when he meets a young man / teenaged boy named Tom, who has been duped into working for a terrorist organization called Droppy whose purpose, as far as he knows, is to reduce the human population. I could add many more details, but Atom eventually persuades the boy to leave the organization, rather than act as its agent by placing time bombs in populated areas, including Tokyo Tower.
Guess who Tom grows up to be!
