Keroro Gunsou  

Sergeant Frog, Sergeant Keroro, Sgt. Frog, ケロロ軍曹, Sersan Keroro

Sergeant Keroro is a frog who leads an elite team sent from the 58th Planet of the Gamma Storm Cloud System to gather intelligence about Earth, which they plan to invade. However, his ship crashes on Earth and he seeks refuge in the Hinata household. Unfortunately, the two children, Fuyuki and Natsume, discover him and take away his weapons. When Keroro's people learn that the Earthlings are aware of their presence, they abandon him, leaving him to fend for himself in this unfamiliar world. Despite being alone, there are four other pre-invasion agents also hiding on Earth.

Keroro Gunsou has been published digitally in English as Sgt. Frog by VIZ Media under the VIZ Select imprint since December 30, 2014.