A sci-fi retelling of Wagner's "Ring of the Nibelungen", starring Captain Harlock. The series was first serialized from 1990 to 1991 in Chuukosha Fan, a used car magazine (!). A sequel was published for free directly on Shinchousha's webpage from 1997 to 2000, making it probably the first online manga.

Two siblings making their way through a world rife with atrocities…

Centuries in the future, in the year After Colony 195, Earth is surrounded by orbiting space colonies. The colonists are cruelly oppressed by the Earth Alliance, which uses huge humanoid fighting machines called "mobile suits" to control the populace. Behind this tyranny is the secret society called "Oz," which has infiltrated the Alliance military and steered it towards its repressive course. Now, the space colonies are ready to strike back. Five young pilots, equipped with advanced mobile suits called "Gundams," are sent to Earth to wage guerilla war against Oz and its Alliance puppets. The war to decide humanity's destiny begins...

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Two volumes of the author's best oneshots.

Volume 1: Mushi to Uta (Insects and Songs)

1) Star Lover - The odd relationship between a teenage boy and his uncle's "daughter."

2) Violight - A boy wakes up in an unfamiliar land, with only a strange, ethereal young man to accompany him on his journey to safety.

3) The Kusaka Siblings - A baseball player who's just quit the school team due to a shoulder injury and the adorable robot he adopts as his little sister.

4) Mushi to Uta - The story of a young man who builds models of insects for odd clients, and his siblings. Winner of the Shikitaishou award.

5) Secret - A two-page oneshot.

Volume 2: 25-Ji no Vacances (25-Hour Vacation)

1-2) 25-Hour Vacation - Marine biologist Nishi Otome takes time off and reunites with her brother, Kotaro, for the first time in a while.

3) On Pandora - The meeting between a delinquent named Nana and a strange transfer student at Pandora Women’s College, located on one of Saturn's satellites.

4) The Funeral of the Moon - A genius high school student begins living with a lonely man in the isolated snowy mountains of the north.

Note: Mushi to Uta was nominated for the 3rd Manga Taisho in 2010. 25-ji no Vacance was nominated for the 5th Manga Taisho in 2012. Winner of the Tezuka Osamu New Artist Prize (2010).

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A collection of short stories:

1. Shoujo, Shoujo, Shoujo na no
Hirako Bell, a pretty middle schooler had moved to the country. She currently dislikes the country due to her love for the city life. She also aspires to be a model, and therefore applied with an agency. She had also made a certain friend. Will Bell pass the audition? What about her new friend?

2. Solitary Girl
A strange disease has forced most mankind to extinction, leaving only a recently awakened girl Kana, and a robot teddy bear. Kana remembers a certain boy during her slumber, so searches for him and anyone in general throughout the now empty world. Will she find anyone?

3. Under Heaven
Miyata Chikami is a very popular girl at school that wishes to live a simple life. When she gets home, she is suddenly in debt situation, and one man had taken her to his place, as what her dad had arranged. He was a strange one, but she was quickly attached to him. Will Chikami ever have her simple debt free life, or will destiny run to another course?

4. Half is made out of love
Wataya Himari is currently dating the super popular Hosikawa Atari, her senpai. There's just one big problem: he is a sadist! Himari still wants to be lovey dovey with despite his nature, but one can only take so much. Can Himari ever be in a lovely relationship with her beloved senpai?
This story was released as a oneshot in the He Loves You anthology volume.

5. On The Bed
Mirai is a plain, and will always think that she would never have a boyfriend. Whereas, Kouki Koyomizu, a popular boy in her class stands out and is in a completely world to her. Due to certain circumstances, she ended up visiting his house and he kissed her? Just what is going on?

The decimating war against the androids turned much of the world to wastelands. Humanity though victorious, was forced to start living in shelters, to escape. Dr. Gepetto, one of the brightest android creators of his time, died. Leaving behind an inheritance of untold proportions. The only clue to finding it will be in a blue haired android, that he built and hid away in one of his estates. The android was reactivated, and she's attempting to escape the grasp of the new government. The hunt for the inheritance begins.

Mizu Wakusei Nendaiki (Aqua Planet Chronicle) series.

From MangaHelpers:

Tokitou Haruto, during his first year in middle school, lost all of his friends because of a Science Fiction novel he had read. He was so engrossed in the novel that he started calling men “Kei” and the ladies “Florlain,” which had spread throughout the school at that time. Unable to cope with the sudden exclusion, Haruto continued to isolate himself throughout his middle school years.

Now, as a first year high schooler, Haruto faces a new “problem.” One casual day at school, the classroom becomes perfectly still. Time has stopped again. Having experienced this time-stop multiple times, Haruto begins to wonder if this time-stop is actually a dream. But all of this doubt stops when he meets Sakazaki Kuon, someone else who knows and experiences the time-stop. She is also part of a team of members who defends the world from monsters who attack the world using this time-stop dimension: Kohakjal. What relation does Haruto have with a group who fends off time-stop monsters? Could it be that he's the only who can truly fight them off? [Midori-Mori]

Based on the early Japanese folktale Taketori Monogatari, this is a story about a Princess exiled from the moon and her story on Earth. On the dark side of the moon exists a highly advanced civilization divided into two clans, the Takenouchi family and the Umenouchi family. Takenouchi Kaguya is the daughter of Takenouchi Fumiya, the acting queen of the clan. Kaguya is the next in line for the position for queen but she refuses to be obedient and wants to enjoy life. The bratty Kaguya despises her mother and the people around her for being so strict and often wishes she was never born as a princess. Queen Fumiya has been severely ill for many years now, but has kept it from her daughter in order to protect her but her condition has worsened. The Umenouchi family takes this opportunity to start a coup and takes over the government. Knowing that she is not able to ensure her daughter’s safety on the moon, Fumiya sends Kaguya to Earth with the powerful katana that symbolizes her ownership of the moon. Without the sword, the Umenouchi family cannot usurp control of the moon. Kaguya is forced to mature and become stronger in order to take back what was once her mother’s!

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From ADV Manga:

On the planet Aqua, a world once known as Mars, Mizunashi Akari has just made her home in the town of Neo-VENEZIA, a futuristic imitation of the ancient city of Venice. The technology of "Man Home" (formerly Earth) has not entirely reached this planet, and Akari is alone, having no contact with family or friends. Nonetheless, the town, with its charming labyrinths of rivers and canals, becomes Akari's new infatuation, along with the dream of becoming a full-fledged gondolier. Reverting to a more "primitive" lifestyle and pursuing a new trade, the character of Akari becomes both adventurous and heartwarming all at once.

From: Easy Going Scans

A Demon Lord spirited the Princess away, and cursed her with eternal sleep. Countless knights sought to save her, only to die in vain by the Demon Lord's hands. But then, a Nameless Knight arrived to vanquish him and save the Princess, ignorant of what fate had in store for him...

The Golden Age of Pirates

In 1715, pirates established a lawless republic in the Caribbean and ruled the land and seas. These outlaws paralyzed navies, halted international trade, and plundered vast fortunes. They threatened the power structures that ruled Europe, inspired the imaginations of millions, and left a legacy that still endures.

Into this world sails a young, cocky, and fearsome captain named Edward Kenway. His skill with a sword and disdain for authority earn him the respect of pirate legends like Blackbeard, but thrust him into an ancient conflict that threatens to destroy everything the pirates have built.

Some robots go trick-or-treating.

From Rayns&Lele Scans: A devastating disease called Melancholia spreads across certain areas of the city, causing the unfortunate person to lose their memories of their most important person. Kazanami Toki is unaware that he has caught the incurable disease, but "by chance" he meets his forgotten lover, Hanamiya Yuna. After their fateful encounter, he is left with a strange feeling he is unable to understand...

From Horobosu Scanlations:

"Seriously, I'll finish you within three hours."

That's what Kirishima Haru had in mind when he entered the virtual world of a dating sim. Haru's had it all since childhood - looks, charisma, good grades, athletic talent and girls, but in this virtual world, Haru would meet the only thing he wants and unable to attain. At the edge of the incomplete world, the love story of a player and a NPC unfolds.