Manga with Sci-Fi genre:

Birdman Anthology

(from ebookjapan): Highly intelligent birds have exterminated humans and become the rulers of the earth!  However, the bird society that was born to correct the evolutionary distortion on the earth is not an ideal world, and it soon begins follow the same path as human society. What will become of the decadent avian society...?! Also contains the Otona Manga (Adult Manga) "The Story of Fumbling Animals". Licensed in English by Ablaze as "Tomorrow the Birds". --- **Volumes 94 and 95 of the Osamu Tezuka Complete Works**

3.4 (6)

Chapter 4

3 years ago
Monsters Animals Anthology Survival Office Workers Military Gore Aliens Supernatural Thriller Sci-Fi Action Psychological Comedy Adventure Philosophical Drama Horror Slice of Life Mystery Tragedy
The King of Braves GaoGaiGar Side Story: King J-Der -The Burning Phoenix-

A side story following the warriors of the Red Planet in the far reaches of outer space. Takes place after the events of the TV series and the 43.5 COMIC.

4.2 (9)

Chapter 2

3 years ago
Sci-Fi Action Mecha
Death Hunter

A fierce, ruthless, aggressive and evil creature, the cosmic life form "Death" appears before the human race. An epic tale depicted by the brilliance of Hirai and Kuwata's on humanity's collapse and the birth of a new human race!

3.9 (19)

Chapter 40

3 years ago
Sci-Fi Action Drama
Tetsujin - Mitsuteru Yokoyama 80th Birthday Commemorative Guidebook

4.0 (2)
Thriller Sci-Fi Historical Mecha Magical Girls Drama Tragedy
Tenshi no Bokujou

With match's return to the illustrious hardcore porn magazine Comic ExE comes another three-part, high-stakes yuri story... Welcome to Saint Basileia, a school for producing and raising genetically superior human beings! It's here where sacred and profane lineages are curated and one's worth is determined by genes alone. At the top of this hierarchy are the students clothed all in white who contain within them the lineages of angels and saints, androgynous beings called "Nephilim." It is the duty of the other students to provide them with daily care and genetic material to ensure the continuation and perfection of these lines. A fair warning of dubious consent across the board for this story. Tags will be updated as chapters are released.

4.3 (62)

Chapter 1

3 years ago
Sci-Fi Girls Love Drama
Mezzon Z

(from ebookjapan): The word "Mezzon," meaning "middle child," has been turned into the name of an organization that stands in the middle of the world's two major powers and protects peace - and it has become the name of an organization that protects peace. Kenji, a curious boy, saves his brother, Mezzon J, a member of the Japanese branch of Mezzon, from a difficult situation and becomes a member of Mezzon. Mezzon Z" was born! Just as Kenji becomes accustomed to handling the Mezzon uniform with its various secret weapons, his older brother, Mezzon J, goes missing. In order to rescue him, Mezzon Z heads to the "Island of Superhuman Brains," but...? A near-future spy action manga!

3.0 (5)

Chapter 9.1

3 years ago
Monsters Animals Survival Office Workers Military Gore Police Thriller Sci-Fi Action Psychological Comedy Crime Adventure Drama Slice of Life Mystery Tragedy
From the Beyond...

A mysterious cave in a Martian canyon preserves the memory of humanity's distant past.

Sci-Fi
Mega Man 5

Dr. Right has been kidnapped by Blues! Why did Blues ask Rockman to fight him? Is he really an enemy of Rockman, and is Dr. Right's life in danger? As Rockman tries to figure out the answers, he is confronted by eight major bosses with powerful robot armies!

4.3 (5)

Chapter 3

3 years ago
Video Games Adaptation Thriller Sci-Fi Action Comedy Mecha Adventure Drama Tragedy
Pippy

In a world faced with a flood of overpopulation, the scientists of the world are called together to come up with solutions. Prof. Leeman suggests for man to live in the sea, but is shunned. In an act of desperation, he turns his son into a merman, and sends him into the sea. This boy is found by a mother sea turtle, and is given the name Pippy. Pippy, unaware of his true parentage, grows up alongside others in the ocean, until he has a terrible encounter with humans. Thus, Pippy goes into the human world, and a long journey awaits him. --- **Volume 137 of the Osamu Tezuka Complete Works**

2.9 (4)

Chapter 3.1

3 years ago
Animals Survival Mafia Delinquents Police Supernatural Thriller Sci-Fi Psychological Comedy Crime Adventure Philosophical Drama Slice of Life Mystery Tragedy
Tokyo Game

In post-apocalyptic Japan, a nameless mahjong player ascends a massive tower, facing formidable opponents in life or death gambles.

4.0 (18)

Chapter 20

3 years ago
Traditional Games Post-Apocalyptic Gore Sci-Fi Psychological Adventure Drama
Sabi no Yume

Shindou works at a company where a certain product is being created. A product that is a cyborg sexroid modeled based on an actual boy's body. Shindou is then grudgingly put in charge of their prototype. He is initially very against his new assignment, but this cyborg boy eventually manages to melt his heart.

4.2 (136)

Chapter 9.6

3 years ago
Sci-Fi Psychological Romance Comedy Boys Love Drama
A Story About Something Humans Forget, but Cats Remember

4.2 (137)
Sci-Fi Psychological Slice of Life
Meteornauts

Beautiful girls from all over the world gather up to live... in a space station? A comedic and tear-jerking story that accurately depicts the struggles of space!

4.2 (18)

Chapter 5

3 years ago
Sci-Fi Adventure
Roppu-kun

Roppu was a toy abandoned by the child of aliens. He was rediscovered by Roppei, the son of a fisherman. Roppu can fly when the button on his chest on is pressed. Roppu can also create anything, even things thought to be impossible. When the star on his head is pressed, Roppu falls still. Roppu and Roppei have all sorts of adventures, with questionable figures often trying to get their hands on Roppu for their own desires. Volume 2 includes "Bongo" (First Grader version): Bongo is a boy who lives in the jungle and is a master archer entrusted with maintaining peace in the jungle. Bongo learns of a treasure called the Golden Bow, and goes in search of it along with his ally Chap the Squirrel. The two must overcome seven perils to reach it at the Mountain of the Sinking Moon. --- **Volumes 119 and 120 of the Osamu Tezuka Complete Works**

3.0 (3)

Chapter 21.2

3 years ago
Monsters Ninja Survival Mafia Office Workers School Life Delinquents Sci-Fi Action Psychological Comedy Mecha Crime Sports Adventure Drama Slice of Life Tragedy
The Cape Sunazuri Bookstore

A traveling salesman finds what he's looking for in a second-hand bookstore in the countryside.

3.9 (38)
Sci-Fi Adventure
Rootless Market

When a private detective in a bustling market town in a post-apocalyptic future is asked by the local mob boss to find a certain person, she finds more than she bargained for...

3.8 (38)
Sci-Fi Comedy Crime Adventure Mystery
3: Utakata no Hibi

Length speaks.

4.6 (54)
Sci-Fi Romance Comedy
Fukoku Sakusei ~Shounen no Seieki wa Chikyuu wo Sukuu~

Summer, 2090 AD. A super medical revolution occurs. It started 10 years ago. It was because a certain substance was discovered. It was a substance that could heal all kinds of diseases. That substance was... the sperm of a young boy from around 10 or 14 years old. The world... was entering into a big 'milking era..

3.4 (18)

Chapter 14

3 years ago
Sci-Fi Boys Love Medical
Self-Propelled Public Bath

A postapocalyptic science fiction world of desolate deserts. Toranoyu, a self-propelled bathhouse that moves from town to town. Relaxing in the hot water as guests are three women from a scrap metal recovery business. Set in a chaotic fictional future world, guns and violence, lust and humanity intersect in this sci-fi action drama!

4.1 (81)

Chapter 4

3 years ago
Sci-Fi Action Comedy Adventure
Macross Δ: White Knight of the Black Wing

The year is Year 2058 and the 'White Knight', Keith Aero Windermere who is a royal prince but as an illegitimate child of the king has no right to the throne, returns home to Windermere. His younger brother, Heinz, the heir to the throne is the "wind singer" and his voice can cause havoc to the enemy. Everyone in Windermere is preparing for war and everything will depend on the relationships of the two brothers and the people around them! The long-awaited manga providing the background story of the airborne knights who take part in "Macross Delta"! (The story takes place 9 years prior to the events of Macros Delta.)

3.7 (22)

Chapter 11.5

3 years ago
Sci-Fi Mecha
Mobile Suit Gundam U.C. 0094 - Across The Sky

In Universal Century 0094, a live exercise for the MSN-001X Gundam Delta Kai is being carried out in outer space. This mobile suit is equipped the "NITRO System" that grants regular pilots the abilities of a Newtype. While the Gundam Delta Kai displays overwhelming power, a side-effect causes the test pilot's personality to become more aggressive. Back on Earth, the Earth Federation Forces aggressor squadron "Raven Corps" arrives at the Federation Forces Mariana base. Brothers Braier and Ing Ryude, who are pilots stationed at Mariana base, participate in a mobile suit mock-combat exercise with the Raven corps. During the exercise, the brothers are attacked by the Raven corps using live ammunition. Piko Altidore, captain of the Raven corps, reveals the object of the attack is the Gundam Delta Kai stored in "Area X" of the Mariana base. During the battle, Ing boards the Gundam Delta Kai to defend the base against the Raven corps' assault. However, the NITRO system brings about a berserk state in Ing, causing him to attack both allies and enemies. Piko manages to subdue the Gundam Delta Kai with a pulse grenade and opens a communication line with Ing. After this exchange, Ing seemingly joins the Raven Corps and departs the Mariana base in the Gundam Delta Kai.

3.9 (24)

Chapter 16

3 years ago
Thriller Sci-Fi Action Psychological Mecha Adventure Tragedy
Kimi wa Haru ni Me o Samasu

From Lovesick Alley Ito and Chiharu, though seven years apart, share a very deep friendship in which Ito has an unrequited love for Chiharu. In a turn of events, Chiharu is afflicted with a terminal illness and is put into an induced comatose state in hopes that a cure will be developed while he is sleeping. After seven years, Chiharu wakes up, and finds that Ito is now the same age as him, and that his then-classmate has become his homeroom teacher.

4.0 (216)

Chapter 50

3 years ago
Sci-Fi Romance Drama
Futureman Kaos

Koji Sunami and Jo Daigo are childhood friends, who together take the exam to get into the prestigious Milky Way Academy. However, Koji passes and Daigo fails. A mysterious man offers Daigo a place in the academy and a high-ranking position, but only if he kills Koji. He accepts, but Koji is helped by a mysterious girl and is revived. He returns ten years later to find Daigo in great power, and is sent by him to the prison planet Chaos. --- **Volumes 131-133 of the Osamu Tezuka Complete Works**

4.3 (2)

Chapter 2

3 years ago
Monsters Animals Aliens Sci-Fi Action Psychological Comedy Adventure Drama Tragedy
Mega Man Maniax

A series of short and comical stories, essays, and projects requiring reader participation that were originally published in Comic BomBom between 1997-1998.

Chapter 10

3 years ago
Thriller Sci-Fi Action Comedy Mecha Adventure Drama