Manga with Sci-Fi genre:

Espers Legend Justy

A sequel to the first Justy series that started being released in September 2011 on ebookjapan's web magazine, "KATANA". Was collected in ebook format alongside the first Justy series, with the first three volumes collecting all 20 chapters of the original series, and then volume 4 and onward containing the new stories with a new set of numbering.

4.5 (1)

Chapter 1

3 years ago
Sci-Fi Action
Heroine o Mezase!

The Earth is in danger and is about to be invaded by aliens. Misao is a gymnast, and a scout witnesses one of her amazing gymnastic routines and asks her if she wants to be a heroine. What did this scout mean by "heroine"?

Chapter 4

3 years ago
Sci-Fi Comedy Sports Adventure
Yu-Gi-Oh! VRAINS - Those Days Became Jewels (Doujinshi)

Jin and Lightning go on a trip to Italy together.

1.3 (5)
Sci-Fi Boys Love Slice of Life
Mega Man 7

A few months after Dr. Wily was arrested thanks to Rockman's efforts, the four robots that were set to activate in the event that something happened to Wily awoke and attacked the prison. Wily easily escaped, and once again, Rockman is forced to fight him.

4.3 (3)

Chapter 18

3 years ago
Sci-Fi Action Mecha Adventure
Medabot Reloaded

The socially withdrawn young man; Kagami Rokuyou one day faces the reality that his childhood friend Chidori Mamori has been kidnapped by a mysterious entity. The condition for releasing Mamori was to exchange her for a rare medal, which is the winning prize of the Robottle World Championship. Nine years ago, Kagami became lonely for the rest of his life due to an accident and quit Medabot, but he activated his partner Metabee once again to save Mamori. Can Kagami win the world championship and save Mamori?

3.9 (11)

Chapter 11

3 years ago
Sci-Fi Action Comedy Mecha Adventure
Sorobochis Splatoon Extras

A collection of Splatoon comics and fanart.

4.3 (15)

Chapter 8

3 years ago
Sci-Fi Slice of Life
Maria-san wa Toumei Shoujo

Maria discovers her invisibility powers when she is 5 years old, but there's a catch – whenever she feels calm or depressed, she starts turning invisible against her will. The only way to turn back or stay visible is to make sure she has heart throbbing doki doki thoughts available at a moment's notice. What better way to keep her heart throbbing than to hide in her handsome senpai's house, naked and invisible, and watch his most private moments? A new scifi work with a slightly(?) hentai heroine by the same artist that brought us Midori no Hibi and Mahou no Iroha!

3.1 (208)

Chapter 7

3 years ago
Sci-Fi Romance Comedy
Devil King

In Kitakaruizawa, a human larger-than-life springs forth from the Kobayakawa Research Center in the middle of the night. That same human, in an instant of pain and agony, turns to dust and is swept away by a forceful gale across the landscape, a tremendous sight witnessed only by clan of truck drivers rushing down the late-night highway. The experiment of Doctor Kobayakawa ends in a disappointing failure, yet the elder brother of a young Akio makes the acquaintance of the Doctor, unmistakably a trap, one bearing the danger of a new experiment…

3.6 (8)

Chapter 16

3 years ago
Monsters Demons Survival Office Workers Post-Apocalyptic Military Gore School Life Police Supernatural Thriller Sci-Fi Action Psychological Comedy Crime Adventure Philosophical Drama Horror Slice of Life Mystery Tragedy
Shin Megami Tensei - Eden

In a demon-haunted world following nuclear Armageddon, the devil summoner Raishin chances upon three children. After saving them on a whim, he asks what hopes they have for their future. Jack desires strength. Jin seeks to emulate Raishin. Ayame wishes for an end to conflict then asks what Raishin hopes for. Raishin answers he wants just one thing, to reclaim a paradise lost, to find Eden.

3.9 (25)

Chapter 8

3 years ago
Thriller Sci-Fi Action Psychological Adventure Drama Horror Fantasy Tragedy
Locke the Superman Classic

Locke the Superman first began as Doujinshi series and now those stories have been recollected. "Nimbus and the World of Contrast," "My Love For the Universe," and other long out-of-print Locke the Superman titles from the Sakuga Group era are published again to commemorate the 40th anniversary of King's serialization! A book of rarities that fans must have!

4.3 (3)

Chapter 1

3 years ago
Doujinshi Sci-Fi Action Mecha Adventure
Swallowing the Earth

Amidst the chaos of World War II, two Japanese soldiers hear of Zephyrus, an utterly captivating woman rumored to exist on an island in the South Pacific. The tales of this bold enchantress seducing men to their dooms are both chilling and fascinating. Over twenty years pass, and Zephyrus resurfaces in Japan, seemingly unchanged, to wield her mysterious power over men once more. The one man immune to Zephyrus' charms is simple drunkard, Gohonmatsu Seki, son of one of the wartime soldiers. Employed to spy on Zephyrus, what will Gohonmatsu uncover about her ultimate plot to create international discord and consume the world of men? What brought this woman to conspire for decades against patriarchal society -against an entire gender- and can anything be done to stop her plans? [Official English](https://emanga.com/collections/osamu-tezuka/products/swallowing-the-earth) --- **Volumes 259 and 260 of the Osamu Tezuka Complete Works**

3.4 (11)

Chapter 20.1

3 years ago
Survival Mafia Office Workers Post-Apocalyptic Sexual Violence Military Gore Police Thriller Sci-Fi Historical Action Psychological Romance Comedy Crime Adventure Philosophical Drama Medical Slice of Life Mystery Tragedy
Alabaster

James Block is a former sports star whose criminal endeavors landed him in jail. In prison he meets "Dr. F", a strange old man who tells James about a beam that can turn living things invisible. After escaping from prison, James finds and uses the laser on himself. But, because the beam has not been perfected yet, it only rendered his skin invisible, leaving his insides visible to the outside. Angered at his disfigurement, James takes the name "Alabaster" and begins eliminating the hypocrites and the boastful. He is joined by Ami Ozawa, the granddaughter of "Doctor F", who was rendered invisible after the doctor used his pregnant daughter as an "F Beam" test subject. On their trail is Rock, a vicious FBI agent. [Official English](https://emanga.com/products/alabaster-vol-1?variant=32122232710) --- **Volumes 89 and 90 of the Osamu Tezuka Complete Works**

3.3 (43)

Chapter 10

3 years ago
Monsters Survival Mafia Crossdressing Military Gore School Life Delinquents Police Thriller Sci-Fi Action Psychological Romance Comedy Crime Sports Adventure Philosophical Drama Horror Slice of Life Mystery Tragedy
The Sword of Alexander

Yorozu Genkurou, wandering warrior, possesses a huge sword which makes him redoubtable to his enemies. While he crosses a dark forest, he suddenly sees the fall of what looks very much like a spaceship. Since, he is constantly being attacked by strange ninjas and ambitious fighters. Indeed, he will soon realize that his assailants are nothing else than aliens landed on Earth to find 3 artifacts made of Orichalcum, an alien substance with powerful mystical virtues. And one of the artifacts is the sword he wields. The hunt begins.

3.9 (22)

Chapter 4

3 years ago
Sci-Fi Action Drama Fantasy
The Melancholy of Haruhi Suzumiya - Cheer Haru (Doujinshi)

There is something different about Haruhi Suzumiya today and Kyon plans to get to the bottom of this change in her mood.

4.1 (40)
Sci-Fi Romance Comedy Philosophical Mystery
My Kairos - The Tale of Little Gladiator

After being sentenced to death, the girl Gladiolus was sent to a planet inhabited by robots and is forced to fight as a gladiator to win her freedom!

4.2 (130)
Sci-Fi Action Comedy Mecha Drama
Oshikake Ouji wa Nido Oishii

A bottom corporate slave gets some heart and physical healing from the high-spec boy she picked up...? After staying up all night from doing overtime, Yuri Hayama was dumped by her boyfriend just when she thought they would get married. On the way home, she helped a little boy and the next day, she woke up hearing "Good morning" from a handsome guy? This is a story about a forcible love with a mysterious younger boy!

4.3 (41)

Chapter 2.3

3 years ago
Sci-Fi Romance Comedy
Phantom Ship

(From ebookjapan): On a stormy night, Isamu witnesses a black phantom ship flying in the sky. He follows a man who has descended from the vessel and ends up at the Terada residence. There he finds four men terrified by a threatening letter from a man claiming to be Daisaku Arashiyama. Gradually, Isamu's family's past is revealed. Is the phantom ship a friend of justice or an ally of evil? The manga that inspired the 1969 anime film "Flying Phantom Ship", Ishinomori's early masterpiece with its SF elements and poignant adventure action!

3.3 (11)
Monsters Ghosts Survival Supernatural Thriller Sci-Fi Action Psychological Comedy Mecha Adventure Drama Mystery Tragedy
Thunder Mask

(from mangaupdates): Tezuka himself is a main character in this volume, a mangaka who finds himself in a science fiction story about robots and transforming creatures. This is an adaptation of the tokusatsu series Thunder Mask. --- **Volume 270 of the Osamu Tezuka Complete Works**

3.4 (6)

Chapter 5

3 years ago
Monsters Survival Military Gore Police Aliens Adaptation Thriller Sci-Fi Action Psychological Comedy Mecha Superhero Adventure Drama Slice of Life Tragedy
Mega Man 6

In order to counter Dr. Wily's repeated plans for world domination, the X Foundation and the World Robot League are formed with the goal of peace. The X Foundation sponsors a robot championship to determine the best of the best. However, Mr. X, the general of the X Foundation, takes all eight robots and uses them to take over the world. Rockman's battle to stop Mr. X's ambitions begins.

4.1 (10)

Chapter 14

3 years ago
Survival Video Games Adaptation Thriller Sci-Fi Action Comedy Mecha Adventure Drama
Son of Shaka

*Who is he? Where did he come from? What did he come to do?* A man bearing the moniker "the Son of Shaka" comes by the peaceful, quiet Shogidani Village. Followed by a trio of triplet sisters, his agenda is unknown, but he quickly gains a good reputation within the village... He doesn't matter much to the village boy Tomeo, though, who is threatened with separation with his girlfriend, Seiko, and ever-persistent advances by the pesky Aoki. That is, until Seiko starts to feel swayed by the Son of Shaka's aid, his 'hand of love'. Tomeo's concern isn't just petty jealousy, though - the Son of Shaka's intent points to a certain direction.... George Akiyama ([*Ashura*](https://mangadex.org/title/14e8feb7-1388-4fae-9f2e-eb42c571ae91/ashura-george-akiyama), [*Money Crazy (Zeni Geba)*](https://mangadex.org/title/e8688451-514d-4af7-9e1e-bd1170bbe881/money-crazy) ) presents a chaotic thriller of a close-knit village being stricken with corruption, calamity, and absolute evil.

3.4 (11)

Chapter 9

3 years ago
Survival Military Gore Delinquents Aliens Thriller Sci-Fi Action Romance Comedy Adventure Drama Medical Horror Slice of Life Mystery
Dragon Ball Super (Official Colored)

Having defeated Boo, Goku is starting to get bored with his life on Earth. His wife, Chi-chi, wants him to get a job, but all he wants to do is train and fight stronger enemies. Elsewhere in the universe, the God of Destruction, Beerus, and his attendant Whis are traveling from planet to planet in search of food and entertainment. After blowing up some hapless victims, Beerus is reminded of a man from his dreams with the moniker “Super Saiyan God,” or something like that... The God of Destruction sets his sights on Earth to track down this mysterious man! Maybe this will give Goku something to do?

4.6 (206)

Chapter 9

3 years ago
Sci-Fi Action Comedy Crime Adventure Drama Fantasy Slice of Life Mystery Tragedy
1999 (What a wonderful world)

A story about how two friends tries to stop the antichrist, while the are making efforts to deal with their lives.

3.5 (165)
Sci-Fi Psychological Romance Comedy Girls Love Drama Slice of Life Mystery
Tiger & Bunny 2 - No one is perfect.

Young Jump oneshot. The duo Tiger and Barnaby receive their hero suit bangles for the first time. **12/26/22** - Extra pages of additional content added at the end (PGS 16-22).

4.3 (21)
Sci-Fi Action Comedy Superhero Drama Slice of Life
Nina Stardust

This world is full of strange wonders: giant snakehead fishes fall from space, planets are sold and bought, toy monkeys start conversations, a ¥ 300 million lottery hit is won, and special motors make islands fly! After being dumped in a garbage dump the past records of the robot Debris-kun (memory) disappeared into stardust. Due to a chance encounter, the pretty high schooler Nina picked him up stating she would not be a robot master but a teacher. So they lived together with her talented slacker husband Tahei. "After one year, five years later, 10 years later…and 50 years later…" Every time you go through a volume, time is progressing very quickly in this work.A robot does not grow old, but human beings do. The girls grow into adult women, the surrounding environment grows into devastation. Human beings are dying, but the stardust memory of the robot does not die. This manga might give you the feeling of being watched in the transience of the world, possibly from God's point of view. And so the story, in God's speed, proceeds to the future! Following ["Mobile Brigade eight Fukujin"](https://mangadex.org/title/1682), Satoshi Fukushima's new "time skip comedy" series for boys and girls is "Stardust Nina"! [MU+GoogleTranslate]

3.6 (19)

Chapter 9

3 years ago
Sci-Fi Romance Philosophical Drama Slice of Life