A collection of short stories revolving around sci-fi themes: Earth's Final DayKyoko's DreamHappy EndA Tiny Little CometThe Giant Tree, Elkido

Like a typical teenager, there is nothing Tsubaki Ryuuta wants more than to not stand out from the people around him. Unfortunately, on his way to school one day, he is run over by an alien. The alien promptly...

Thanks to deviant sexuality (lolicon, obsession with 2D girls, etc.), the human birth rate has declined, and humanity is headed for extinction. A cute loli girl from outer space, called Muumo, has come to earth...

The story, set in the United Kingdom in 1901, centers on a photographer. In the first chapter, the photographer is on his way to deliver a finished portrait to a client when he encounters a flying object from...

An alien, Mumu, who came to regain the technology lost by his race. The everyday life of an ordinary college student collapses because of his arrival...? A cat shakes the earth! Spectacular romance!!

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...

"It's said that 95% of UFO sightings are shams, but...?"

Puruka is a parasitic alien who came to Earth in order to have offspring. After being saved by a busty high school girl named Fuuka, he begins to live inside of her head. It seems like he'll easily be able to...

The series' protagonist is Takashi Horimachi, a fifth grader at "Anytown" Elementary School. A transfer student named Taro Tanaka enters Takashi's class. Taro Tanaka turns out to be a space alien. Takashi...

https://comic-walker.com/detail/KC_005930_S

A spaceship lands on a bathhouse which belongs to Kazuto's family. Inside is Princess Warukure (Valkyrie) who gives part of her soul to Kazuto to save him from death (caused by her crash). Since she only has...

Grendizer follows the adventures of Duke Fleed, the prince of Planet Fleed, who, disguised as Daisuke, a farm worker, fights against the forces that destroyed his planet, the Vegan Empire, also the creators of...

UFO Robot Grendizer is the third entry in the Mazinger Trilogy by Go Nagai, following Mazinger Z and Great Mazinger. This particular incarnation was illustrated by Gosaku Ota and published in Boken Oh...

The world is being assimilated by a crazy religion, and to stop it I have become their satan. The religion is controlled by aliens, and people don’t have a clue. The world says that aliens don’t exist, but they...

The fierce battles with popular monsters such as the Baltan and Mefilas aliens are fully recorded along with the color pages from the serialization and the chapter covers!

Tsuburaya Productions official manga adaptation of "Ultraman Blazar"

"[...] it's a very nice doujinshi about a busty light giant called Nana by Sasaki Maru." -- Kusanyagi