Random Alien Manga You might like

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Souya is grinding away at his boring days of office work, while holding onto his dream of becoming a manga artist. As he hurries home to his beloved and supporting wife, Yuuka, he suffers an accident, and before he knows it, he's been parasitized by an alien?! What's more, the aliens' evil tentacles are closing in on Yuuka. In order to protect his wife, Souya rushes to her aid as "Ottoman" (Husband-man)! (Source: Shueisha, translated)

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Kade lives his average life alone and undisturbed... until a cute alien girl crashes into his backyard! By opening up his home, will this other worldly girl inadvertently open up his heart? (Source; Webtoons)

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Kinnikuman (a.k.a. Kinniku Suguru) is a cowardly, clumsy, moronic, gyuudon-devouring excuse for a superhero (or Choujin)... who just happens to be the prince of an alien planet. But despite his pathetic appearance, he is very honorable and can become quite powerful when he needs to be. With his sidekick Meat-kun and fellow Choujins Terryman and Ramenman there to help him, Suguru quests to become the greatest Choujin on the planet. Whether with a combination of tremendous heart and stamina (The Burning Inner Strength) or the "Power of Friendship", Kinnikuman frequently defeats villians 10 times more powerful than him and often causes his enemies to have a change of heart and join him. Though he seems destined to be an idiot forever, slowly but surely Kinnikuman becomes worthy of the title "Hero".

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Tokyo, Planet Earth... High schooler Tatsumi Tatsunami lost his parents at a young age and now works multiple part-time jobs to live a hectic but peaceful life with his younger siblings. One day his body undergoes a sudden change... And now mysterious beings are showing up at his house! In order to protect the people he holds dear, in order to protect Earth (or "area"), Tatsumi must awaken! He better, because "they" are already here! Rising star Fusai Naba brings this new cosmic action fantasy series to Shonen Jump! (Source: MangaPlus)

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A spin-off of the Parasyte series that focuses on the son of mayor Takeshi Hirokawa investigating his father's secret relationships with the alien Parasites. (Source: Manga Machinations)

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Series of stories about Parasyte, from various notable mangaka. 1. Agonashi Gen to Ore wa Kiseijuu by Hiramoto Akira 2. Kisei!! Ekoda-chan by Takinami Yukari 3. PARAGANT by Nirasawa Yasushi 4. EDIBLE by Endo Hiroki 5. Migi no Tabi by Ueshiba Riichi 6. Perfect Soldier by Minagawa Ryouji 7. Kawari Mono by Kumakura Takatoshi 8. Oshiete! Tamiya Ryouko-sensei by PEACH-PIT 9. Lucy to Migi by Mashima Hiro 10. Konya mo Eat It by OHTA Moare (Source: MangaUpdates)

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A massive asteroid is about to hit earth! Humanity has failed to stop a giant asteroid from plummeting into Earth, and life as we know it has ended. An ordinary Korean office worker named Cheolsu is somehow given the chance to go back in time and prevent this catastrophe from ever happening. Does he have a chance? (Source: Manta)

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Follow the intergalactic adventures of a man traveling the stars with a mission: to bone the hottest girls the universe has to offer while uncovering the mysteries of his forgotten past. (Source MU)

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When I wake up, everything is a mess. War? Extraterrestrial invasion? Whatever it is, I just need to take my personal revenge. (Source: MU)

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In the vast expanse of space, inside a cargo compartment made of cold metal, I couldn’t help but acknowledge one thing: I had become an antagonistic extraterrestrial life form in an SF survival game.

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On his way home from work, the 26 year old salaryman, Kawakita Osamu, encounters an alien named Lilin. She and her species plan on invading the earth but she ended up getting stranded on this planet. Can Osamu raise her to become a kind-hearted kid before her species eradicates humanity in five years? (Source: MU)

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Fuwami, a mysterious rabbit from the Moon who had just lost her job due to a restructuring in the company she used to work in, flew into the room where Shinjirou, an employee of a black company, lives. (Source: MangaUpdates)

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One day a junior high school sophomore student Kuro-chan, discovers aliens coming out of her closet! Now, it's up to her to regulate these migrant aliens!

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Space Dandy is a dandy guy, in space! This dreamy adventurer with a to-die-for pompadour travels across the galaxy in search of aliens no one has ever laid eyes on. Each new species he discovers earns him a hefty reward, but this dandy has to be quick on his feet because it's first come, first served! Accompanied by his sidekicks, a rundown robot named QT and Meow the cat-looking space alien, Dandy bravely explores unknown worlds inhabited by a variety of aliens. Join the best dressed alien hunter in all of space and time as he embarks on an adventure that ends at the edge of the universe! (Source: Bandai Visual)

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The world is under attack, huge unidentified floating objects soar the skies and cause panic. But the soldiers sent to stop them have deserted and gone home to enjoy their family time. 7 heroes show up to fight the unknown threat. They fly up in the sky in a glow of light while they are enveloped in big robot frames. Is this the time for Souya to join the heroes in a fight for humanity? No, apparently he has to fight off the heroes. (Source: MU)

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The girl I fell in love with is... an alien!? I, the class president, happened to fall in love with my classmate, the eccentric Haru. I confessed my feelings, but her true identity was an extraterrestrial who came to Earth to survey it. Telling her "I still like you!," I started going out with Haru, but now I have further "secrets" to keep... (Source: Kodansha, translated)

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The astronomical event "Apple Moon" occurs once every 300 years. On that day, Sakuma, while visiting the ocean with his classmate to observe the event, ends up meeting a parasitic alien instead...? (Source: MU)

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The surreal gag manga follows a quiet, timid girl named Misuzu whose older sister Naoko is returning from studying aboard. However, when she hurries home to meet her sister, Misuzu instead encounters Naoko-san, the strange alien from Yuri-sei (Yuri Planet) who loves eroticism, yuri, and girls.

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Astronaut Mawatari encounters a humanoid creature during a moon surface investigation. Because they are both lonely, they promise to teach each other about the universe and the earth...!? Source: MU

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After regaining consciousness, your average high-schooler Asagaya Shin has become an AI for a space battleship. As if that wasn’t enough, the ship has been surrounded by enemies, and he himself has a damaged engine, putting him in a dire situation.The warship commander had already died in combat, and taking the place of the temporary commander is a young girl of the imperial family, who had joined the ship out of courtesy. Shin had tried convincing himself that this was a dream, but being persuaded by the girl, he stands as a battleship.After somehow crushing the enemy at point-blank range, the fleet’s fight is over, and the battle for the fate of the empire has ended in a crushing defeat. Shin gathers up the survivors and plans to escape the battleground, but there’s a large enemy fleet on the route to the empire. He makes a jump deep into the enemy territory on a slim chance, but —Set 10,000 years in the future, a young boy has been turned into an incredibly powerful cheat AI and leads a small fleet to become peerless. There’s romantic comedy, imperial intrigue, ancient weapons, philosophy, and more! (Source: MU)