A series of interconnected vignettes regarding Makoto Sawada, an energetic yet socially inept kindergartner, and his long-suffering family. Makoto strives to receive the title of his school's "Best Child" award, resulting in chaos and misunderstandings wherever he goes.

After a nuclear holocaust tears the world apart, mankind is forced to the harshness of not only the oppression of others who are much more powerful, but the dead earth which seems to be getting worse with every passing moment. But a savior has risen from the ashes, a man who will defeat those who would torment the weak and make the world a livable place once more. A man named Kenshiro...