This award-winning classic story focuses on Marlee, an agent of the space empire sent on a mission to track down the opera singer Eroccus. There are three intertwining narratives which span planets and hurl the readers back 30,000 years in time. The narrative takes place in a non-linear fashion, unfolding across space and time, before folding back upon itself at its culmination.

Note: Winner of the Seiun Award in 1983.

Note 2: Gin no Sankaku was not serialized in a manga magazine. Based on content, it could be considered either seinen or josei.

An bonus chapter included with the final volume of Getter Robo Āḥ. Dr. Hell discovers a biomechanical lifeform known as "Kedora" in the depths of Bardos Island, and realises that he can use it to fight Mazinger Z.

The story of this chapter was loosely adapted into the sixteenth episode of Shin Mazinger Shougeki! Z-Hen.

From Dragon Voice:
First of Jack & Elena series, where Jack meets Elena. The two are robots. They can live forever. Do they want to? Maybe yes, since they found each other.

From PRISMS:
It's a story of a love triangle composed of two sexless (but not completely genderless) androids and one human woman.

Many children mysteriously disappear in 2005. This is called it the "Reasal Phenomenon." A few children came back with tails on their behinds. One of them was Hana Yamaguchi. Hana calls upon children with tails and creates the "Macro Cosmic Invincible Legion of Kids."
These children can go freely back and forth from one world to another and with such special powers, they save missing children. But then, the Ali Troops invade this world. This is a fascinating science fiction drama about the wonders of the universe.
--Kodanclub.com

From CMX:

Matsuyuki Takeru could not have anticipated the decidedly different turn his life would take. After his mother's death, life continued at a reasonably normal pace — he studied hard for exams, played fantasy role-playing games, even fell in love.

But things began to change when he discovered a half-sister he didn't know about. A strange boy started appearing, claiming to be a warrior reborn who must fight an epic battle against forces of evil! When fantasy becomes reality, will every choice he makes affect the outcome?

The 00V features different variations of the Mobile Suit from the series, and provides the stories about them in every chapter ("volumes"). The earlier stories of the 00V were told from Robert Spacey's perspective based on his encounters with different mobile suits during the height of Celestial Being's armed operations. The perspective of the stories later shifts to different characters, providing their side of the story behind the development and the operation of some of the mobile suits given in 00V.

The year is Universal Century 0133. Ten years have past since the armed resistance of the aristocratic fraction, the Crossbone Vanguard, was subdued. Tobia Aronnax is an exchange student onboard the spaceship Smashion to Jupiter, but during a surprised attack by a group of space pirates who call themselves the Crossbone Vanguard, he finds out that there were actually hidden agendas among those in the Smashion and in Jupiter itself. After being saved by a member of the pirates named Kincaid Nau, he was taken aboard the pirate ship, the Mother Vanguard, and was convinced by its captain, Berah Ronah, to join them. The pirate group's true identity was revealed to be a guerilla group resisting the secret fraction within Jupiter, the Jupiter Empire, which intends to conquer Earth. Now Tobia must pilot one of the three powerful Crossbone Gundam to help this new Crossbone Vanguard in their quest to oppose the Jupiter Empire's plans.

From moetron

Total Eclipse is set in the same world as MuvLuv Alternative, at Alaska's Yukon base, test site 18, where first-class staff from all over the world regardless of country gather to work on new Tactical Surface Fighters.

The main characters are engineers and pilots and it features many TSFs that failed to show up in Alternative.

From ADV Manga:
Najica is a skilled perfumer for CRI Cosmetics, but her talents include more than creating sweet fragrances. She is actually a special operative for the secret intelligence agency behind CRI. Armed with an arsenal and an android sidekick, Najica is on a recovery assignment with no end in sight!

Shinji Ikari attends the NERV Foundation Academy and lives a life of relative normality. One night he encounters Rei Ayanami and Kaworu Nagisa fleeing the scene of a violent explosion and is eventually recruited to assist them and Asuka Sohryuu Langely in fighting the Angels, who have taken on human form, in order to retrieve their cores to support the world tree, Yggdrasil. Should the Yggdrasil die, their world would be thrown into a chaotic state where parallel streams of existence collide, eventually bringing about the destruction of all things. -- Manga Updates

1. Kohrogi
Mitsurugi Kai is a wizard that must pass a test of character. He doubts himself due to his past. His test is to retrieve paper charms by himself. On his way, he meets Kohrogi Orine who is a fledgling singer who also doubts herself.

2. NOIZ
Hayami Shrou can see into the future of people by touching them. Two years ago he lost his parents in an accident, while his sister barely survived, but remains unconscious. He blames himself, thinking that if he had touched them and saw into their future back then, he could have saved them.

3. dZi:s

4. X-connection 2001

One day Taku and his sister Tamaki find themselves on a foreign planet called Slaffleaze. The planet is ruled by the more intelligent creatures, who are led by Zolba (in the name of the king). Zolba plots to invade the world they know as Capricorn (the Earth) to obtain more power. Taku and Tamaki have to stop him before Zolba opens the way to the Earth. In order to do so, they have to gain the trust of Mona, the last remaining member of the Yappi clan, who is the ancestral guardian of Slaffleaze.

Set in the far-future in 28XX, this series of interconnected stories follows the relationship between humans and androids. Two twin brothers, also androids, are "puppet masters." Arashi (Storm) has the ability to animate androids or "dolls" for a specific purpose and Shizuka (Quiet) can shut them down after they have fulfilled their roles.

Haia and Line are police officers in Labihem city at year 2025. This is their daily life and romance and crime solving.

This is a spin-off of the series Night Wizard. It has completely different characters.

ryuunosuke changes into a female wizard when he senses monsters called Emulators

The once-sunken Battleship Yamato returns from its watery grave to wreak havoc across Japan.

"WITH -Friends from Another World-" is a virtual reality social-networking game, which is about to end its service. An in-game couple, Natsumi (human) and Kanata (zombie) say their farewells in the game's final moments.
A short Zombie Girl x Girl oneshot.

In a certain star system, there is a small planet called the Onsen Planet. The entire surface is covered in hot springs, and the ones who manage them are the 4 Santa Monica siblings.