Sgt. Frog - Recommendations

Alt title: Keroro Gunsou

If you're looking for manga similar to Sgt. Frog, you might like these titles.

To Love Ru Darkness: Little Sisters (Light Novel)

To Love Ru Darkness: Little Sisters (Light Novel)

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Renai SLG

Renai SLG

Shibata Youichi is an ordinary high schooler, but one day he runs into a mysterious heroine! The cute girl knows his name, and (as in a stereotypical anime) she's an alien who needs him to help save her people! Soon enough, Youichi finds out that this situation was too good to be true... The girl, named Kyara, does represent aliens, but her people are actually interested in Japanese manga/anime/game culture. They want to use his home as a base and his brain as a measuring tool of the level of appeal of their heroines!

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Uchuu, Lemon Aji

Uchuu, Lemon Aji

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Level E

Level E

Tsutsui Yukitaka is a freshman entering high school who hopes to become a good baseball player. However, when he walks into his new apartment, there is a man in the room who claims that he is an alien who lost his memory. He is in fact the first prince of Planet Dogra, known to have the best brain but the worst nature.

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Grand Doll

Grand Doll

On his way home from school, the shy young boy Tecchin finds the body of a young girl lying in the street. He alerts the police, only to come back to find she has been replaced with a life-sized doll. Tecchin takes the doll home and repairs it. She comes to life and tells him that they are both Grand Dolls, alien beings bent on world domination.

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Wonder 3

Wonder 3

Wonder 3 takes place in an alternate Earth in the year 196X and the world is overrun with war and violence. The Galactic Federation consisting of all the advanced species of the universe convene to decide the future of Earth, but due to a lack of information they decide to send an elite team, Wonder 3, to observe human species for one year and determine whether or not humans are worthy of saving. Upon landing on Earth, the three members of Wonder 3 - Bokko, Nokko, and Pukko - disguise themselves as animals and come across the two Hoshi brothers who defend humanity in their own way. With a time limit of one year, what can Wonder 3 learn from the Hoshi brothers about life on Earth?

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The World of Narue

The World of Narue

Ever wanted to see what it would be like if aliens coexisted with humans? Now you can, through the adventures of Narue Nanase. She's an alien girl living with her father, placed on Earth to keep an eye on humanity and prevent them from having direct contact with aliens, a la Men in Black. However, the situation changes when Narue meets Kazuto Iizuka, a boy at her school, after saving him from an evil alien. Soon, they fall in love and become unseparable.

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DearS Official Fan Book

DearS Official Fan Book

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Watanabe

Watanabe

Watanabe, an alien student from 20,000 light-years away, comes to homestay with the Tokino family to gather material for his thesis on Earthling behaviour. He follows around the various family members asking mostly funny but sometimes profound questions about their work, their loves, their polluted air... When he's not being sent on errands or punched in the face, at least.

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50 Million Km

50 Million Km

Dr Kim works at the Korean equivalent of NASA. He has talent, brains and is unparalleled with his programming skills. One day, he hacks into the Mars Rover and catches the glimpse of an alien. Unfortunately, the device wasn't recording at the time and so he has no proof and clearly no one believes him. And as fate may have it, that alien has come to Earth believing she had been caught on video and wanting nothing more than delete that proof before her boss finds out. Misunderstandings ensures as the two characters meet and are forced to work together as a new group of aliens start stirring trouble on Earth.

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