Revenge~Sure is a sweet thing!

From MangaHelpers:
Sagara Soma is a hardcore gamer, who spends basically all of his time playing or thinking about games. Since he was a child, he's thought of how great it would be to really live in a game world. One day, when he breaks a promise to his cousin Maki in order to play video games, his wish comes true. "New Communicate Online," also known as "Neko-Mimi-Neko," is the game he was playing at the time. Neko-Mimi-Neko is well known for its trick quests, occasional unfairly high level enemies, and many bugs, all of which combine to make players die over and over again. Now that Soma seems to literally be a starting character in the game world, will he re-spawn after death, or actually die? Luckily, he knows just about everything there is to know about the world of Neko-Mimi-Neko, so he may be able to make the unfairness in the game work to his advantage.

Tadahiro Nasu is a downtrodden convenience store worker with nothing to live for but watching VR performances of Misaki Kanzaki, an idol who was once his classmate. Unable to take his oppressive life any longer, he electrocutes himself, only to find that his body has become pure electricity. With his newfound power to manipulate electrical objects, he'll do anything to support Misaki, whether she likes it or not.

Song An, the bottom social animal, is a down-and-out programmer. His daily work is responsible for fixing bugs in a game called [New World]. However, he is more keen to secretly add his own little easter eggs in the game. Turned into a real world, relying on the understanding of the bugs in the game and the easter eggs set by himself, can Song An successfully counterattack?

In an unexpected turn of events, Toki, a high school boy, started dating Fumi Munetsugu, the school's superheroine. After hitting it off to a good start, they faced the next hurdle in the path of romance: a kiss.

Completely out of his element, Toki was unable to go for it.
The fate of the world, however, depended on it...

Biorg Trinity follows Fujii, a high-school student who is in love with Enomoto Fumiho. He lives in a world where people are touched by a rare "illness" called the Biorg Bug. One day Fujii catches the bug which makes holes in the shape of hearts on his hands. What will happen to him now?

As Mustachio and Kenichi make their way through the hustle and bustle of Tokyo, they overhear a muffled scream from a parcel carried by an old man. Ever the curious type, Private Detective Mustachio follows the old man to his home, finding out that he is a scientist, Professor Yamadano.

When confronting Yamadano over the package and his intentions, Yamadano breaks his silence and reveals the discovery he made during a visit to Horseshoe Island. A discovery that has very grim implications...

The final installment in Tezuka's SF "World Trilogy" filled with Conspiracy, Political Turmoil, and Hardship.

Volumes 45 and 46 of the Osamu Tezuka Complete Works

Noah, the last survivor from Earth, aims for a new universe on the spaceship that was handed down to him by his mother who was a scientist. What he arrives at is a planet where living things possess magic. When he is out doing field work, he meets a girl who proclaims herself as the demon lord's daughter.

The cyborg youth will traverse a planet full of mysteries in this iseikai sci-fi fantasy.

One day, at the base of Mt. Fuji, appeared a "castle" pouring out Youkai. To curb the labour shortage caused by a declining population, the government decided to integrate the Youkai into society; however, this led to rising conflicts between Humans and Youkai.

In response, the JSDF, with aims to expand their influence in public security, secretly forms a Youkai penal tactical response force, "Tachikawa Task Force", to execute "tactical solutions" for the various issues born from this new society.

A post-apocalyptic world. Following her last order, the mechanical soldier Ria has been fighting an endless war for over a hundred years. With the people she was meant to protect gone, and her comrades-in-arms lost, Ria spends her days fighting alone.

Then, a human appears before her once more..!?

Due to global warming and rising sea levels of the early 21st century, humanity lost much of the Earth's landmass. At the same time, fleets of powerful sentient ships of unknown origin armed with advanced technology and weapons, known collectively as the "Fleet of Fog", mysteriously appeared and easily vanquished the world's naval forces. The Fleet of Fog impose a worldwide naval and aerial blockade, and thus preventing humanity from traveling across the seas.

Seventeen years after the battle, for some reason, Gunzou Chihaya and his crewmates aboard the I-401 and the personification (Mental Model) of the I-401, Iona, started fighting the Fleet of Fog...

Having been torn from the earth in ancient times, Planet Mamango is now re-approaching the earth after a lapse of 5 million years. One night, a private detective named Ban Shunsaku encounters a murder, and meets boy researcher Shikishima Kenichi, who holds the key to solving the case. Shikishima discovers that a stone from the Planet Mamango generates huge amounts of energy. Making a rocket out of the energy stone, Shikishima sets up an exploration team and departs for Planet Mamango. The rocket heads straight for Planet Mamango under the command of Shikishima, along with Captain Butamo Makeru, Ayame and Momiji, who are cabbages created by the captain, a rabbit named Mii, and Ban Shunsaku. In due time, the rocket lands on the Planet Mamango, where the group finds a “The Lost World,” an ancient environment where dinosaurs walk about and ferns and cycads cover the ground.

Note: The most widely available version (including the english one) is the 1948 one, directly published by Fuji Shobou. This is a remake of an unfinished series Tezuka wrote for the Kansai Kyouron Shinbun in 1946, which has been lost. He remade the series once again in 1955 for Bouken Ou under the title "Zenseiki Hoshi", but this version too has been lost.

Kaijin are attacking! But luckily for the people of Japan, heroes are there to protect them, with powers that run on a rate of yen per second. For Hiasa Sen however, there are much more important things to worry about, like catching sales on groceries, and his many part time jobs, all to take care of his little sister. When danger approaches however, he has a secret power of his own, but it may be more trouble than it's worth.

Chitose Morishige is a 12-year-old seventh-grader with no friend in the world. Her father, Professor Morishige, builds a robot companion for his daughter to ease her loneliness.

The only problem is that Ichika Robata, the android, is built much too lifelike that Chitose believes she's a normal human girl who either ran away or was kidnapped by her father. Ichika attempts repeatedly to prove that she's a real robot, with hilariously disastrous results.

From Yen Press:

Nai–a young man who travels in search of another by the name of Karoku, a lone bracelet his only lead. Gareki–a willful young man who earns his daily bread by thieving and picking pockets. Thrown together at an eerie mansion, where they are entrapped and framed, Nai and Gareki are soon hunted down as criminals by national security forces. As they are driven into a corner, before them appears the most powerful defense agency in the country, “Circus”–!!

An anthology collection featuring Nora and other unrelated stories.

In the distant future, the earth is invaded by aliens and their "machine life" weapons, and humanity flees to the moon. The humans develop android soldiers and organize a resistance army. A long battle ensued & the year is 11941. In order to break the stalemate in the war, a new type of female android decisive weapon, "YoRHa," was formed and descended to the front lines of the Earth. What is the future of the automatic infantry dolls that fight only to carry out their goal of.... retaking the earth for humanity? A complete comicalization of the musical drama that shares the same worldview as NieR:Automata, written and supervised by Yoko Taro! (MTL)

Lee Yooshin went to try out a new virtual reality game. However, it wasn't just a game. It has a 100% assimilation rate! A game world where everything feels eerily real- In the endless cycle of death and resurrection where logging out is not allowed, Yooshin prepares to fight. In order to escape the hellish battlefield from which there's no escape...

After the war, there are many "Extends" in the city, people whose bodies were modified to make them into dangerous weapons. Inui Juuzou is one of them, and he has no memories of his life and body before his head was transformed into a gun. Strangely enough, his head-gun is designed so that only someone behind him can pull the trigger. Juuzou makes a living by taking on cases involving Extends in the city, and he is assisted by Mary, an intelligent young woman that he has taken under his protection.