Sgt. Frog

Sgt. Frog, known in Japan as Keroro Gunso , is a Japanese manga series written and illustrated by Mine Yoshizaki, which is published and serialized in Kadokawa Shoten through its Monthly Shōnen Ace magazine since April 1999. The story follows the attempts of a platoon of frog-like alien invaders to conquer Earth. Sergeant Keroro, the titular character, is the leader of the platoon, but is at the mercy of a human family of three after being captured by them. Keroro is forced to do meaningless chores and errands for the family after his army abandons his platoon on Earth.

From Wikipedia, licensed under CC BY-SA 4.0.