Microid S

is a Japanese manga series written and illustrated by Osamu Tezuka, published in Akita Shoten's Weekly Shōnen Champion from March 1973 to September 1973. It was later adapted into an anime series by Toei.

Plot
Gidoron is an organized colony of extraordinarily advanced ants, who have a higher intellectual power than that of man. They turned three kids into micro insects. The kids tried to reveal the existence of the Gidoron to the people but...