Sgt. Keroro, a frog-like alien that has taken up residence in the Hinata household after his pre-invasion mission fails, is joined by Sgt. Major Kululu who is in possession of a weapon designed to turn Earth's entire population into a bunch of needy children.

Translated from the Japanese. "This book is printed 'manga-style' in the authentic Japanese right-to-left format"--Colophon.