Henry Morris was an 8-circled wizard who was a legend- one of the founding fathers who helped his friend become the king of a unified empire. After the son took over the throne, Henry was executed with the false accusation of leading a rebellion against the empire. He then wakes up in the body of young Henry Morris, the eldest of a baron family, who also happened to have the same name. Henry turns his life around by again relearning magic and also swordsmanship in order to become the first magic swordsman, all for the sake of revenge.

Good for nothing Yoo Hobin is always bullied by students who feel superior to him, yet he ignores them as his life is all too difficult already. However, an unintentional incident ends up turning his life around. He becomes famous through a viral video that he didn't even intend to upload! Everything is perfect! He instantly becomes famous and starts earning money from the accidental video he uploaded.

But since it was unintentional, he is unable to reproduce it. Fueled by the potential money to be made and the sudden change of popularity, he then plans to make more captivating videos that people will find interesting and help him gather more subscribers… However, he cannot accomplish any of that unless he learns HOW TO FIGHT.

From Population GO:
The manga adaptation of Gundam 0083. Years after the One Year War ended, in hopes of resurrecting the Principality of Zeon forces, Anavel Gato (also known as the "Nightmare of Solomon") steals a Gundam Unit 02 from the Earth Federation Forces. In the heat of battle Kou Uraki enters Unit 01 to confront Gato.

In 1988 an enigmatic explosion which has happened in Venezuela caused some mysterious case called "Lost Life Phenomenon". Indiscriminate murder, mass destruction, vanishing of an entire city... Some who got involved in the case say they saw a giant... Fast forward to 1991 in Japan. This is a story about girls who end up piloting gigantic humanoid weapons called "JINKI" fighting against their fate.

This manga started out in 2002 and had 9 volumes published, the "Complete Edition" came out in 2011 and had 3 'large' volumes instead, JUM will be doing the latter.

The island of Eldias, where one wish is said to come true after conquering seven dungeons. On that island, where adventurers gather and compete with each other, there is a boy who is a level 1 baggage handler. The experience he needs to level up is ...... about 100 million!? Despite the tremendous numbers, which make everyone feel sorry for him, the boy uses his "never die" ultimate skill in surprising ways to pave the way to the strongest!

Kang Hyunmoo is a dirt-poor man whose dreams of becoming a hunter were torn apart.
But one day, while he was dreaming of getting rich quick, something appeared in front of him…

[Difficulty: Hell. You are entering the Star of Apocalypse.]
“…What?”

He’ll now be monopolizing items and skills in a future Earth overrun with monsters!

“There’s still more to do, that’s why I need more time”.
With a strong determination, the old man picked up his Rejuvenation potion. The secret of this particular potion is that it rejuvenates the body while preserving the person’s memory. Essentially the fountain of youth. The old man took it anyways and it took a while for the potion to take effect.
--500 years passed…
The man, or young boy at this moment, awoke and found himself in the same world yet different. Nations disappeared, Regression of Civilization, decline in human skills and even basic alchemy has been lost!
Lost Knowledge, Lost Technology! Nothing impossible in the mastery of alchemy!

The brave tale of the peerless Great Emperor Leonard the First was evaluated as a universal truth.
However, in his younger days, before he managed to unify the continent, he was a boorish and clumsy young man, he got his homeland taken away from him and was branded with the infamous name of “Nosferatu”. This is the story of a great counterattack, a great revolt.

Leonard vowed to recover his homeland and truly became a mighty warrior. Several great generals, sages, talented women and geniuses comparable to gods and demons got attracted to the single-minded Leonard and congregated around him. Eventually, they became a great force able to engulf their depraved fatherland and contended against rival countries.

One day, the world transformed into a game.
'Dungeons' and 'monsters' emerged in the middle of cities, and 'players' who had received the gods' authority appeared.

Se-jun Lee, the guildmaster of the Messiah Guild that would bring salvation to the world.
"Let us save the world together. Let's put an end to this nightmare."
The whole world celebrated the hero's appearance,
And I became his comrade.

But...

He wasn't a hero nor a messiah like the world was hailing him.
He was a deceitful hero with the secret ambition to rule the world.
"You did well. If it weren't for you, I couldn't have come up till here."
I lost my life at his blade in the last dungeon.

...or so i thought.

The announcement I heard next to my ear the moment I died.
[Starting the game.]
I returned to the past, back when I still hadn't awakened as a player.

And this time, It's my turn......

To 'hunt' him.

Abel was a genius magician who held immense power in a world where the color of your eyes indicates how powerful you are. However, the strength that came with his amber eyes was so great, even his comrades looked at him with fear and contempt. He therefore decided to transfer his soul far into the future, hoping to find a paradise that accepts him. He would soon find out that people’s attitude regarding his eye color did change, but not quite the way he had imagined…

There has never been a hero like this before!
Is he a hero or an actual demon?

Kang Hansoo was summoned to this world with his classmates.
His classmates were amazed by this brand new world and the magic in it, but the only thing Hansoo wanted to do was quickly return home.

“Why would I give up my warm, comfortable house to have an adventure in this world…?

Even the goddess that summoned me said that if I wasn’t willing to, there was nothing she could do to force me and promised to return me to my original world.
She did teleport me, but…

When I opened my eyes, I was still in this world!
All of my friends were gone, and the only thing around me was monsters!!

A goddess tricked me…?
How do I get back home now…?
More than that, how do I survive here…?!“

Note: This is a direct sequel of Senyuu Main Quest Part 1, which should be read before starting Part 2.

Hero Lyman and Royal Soldier Toryuu, sent off by the King to subjugate the Demon Lord. The two of them are facing off against rampaging demonic beasts to protect some children. But just when they thought all hope was lost... he appears! Who's grown stronger than anyone could've ever believed! What kind of battle will he show us?

Rib Ma- whoops, that is, Hero Alba's new adventure starts now!

(This is a manga remake of Season 2 of the webtoon "Senyuu." Most of the plot remains the same, but with some additional scenes added and minor changes to dialogue.)

In the medieval town of Naudars, albino children hold a revered and protected status. Dorothea is one of these children and she has always wanted to see the world beyond her cloistered existence. When Naudars is attacked, all able-bodied men rise to defend their home. But Dorothea is prepared to defy tradition and enlist in the military. Like Joan of Arc, she must deal with the prejudices of those who are scandalized by the very existence of a young woman warrior. This spirited, sword-wielding girl has to defend herself from charges of witchcraft at the same time she's defending the land she loves.

Full-length side story featuring Jasmine and her past before she joins the Twin Horns.

This is never before seen content separate from the novel but entirely canon.

Minato is a college student who died in a plane crash and was reincarnated in a fantasy world. He was raised alone in the wilderness by his succubus mother, and now he tries to make his way as an adventurer

Yato is a minor god whose dream is to have a lot of followers worshiping him and praying to him. Unfortunately, his dream is far from coming true since he doesn't even have a single shrine dedicated to him. To make things worse, the only partner he had to help him solve people's problems, had just quit the job.

His godly existence and luck just might change after he stumbles upon Iki Hiyori and saves her life—a feat which also leaves her in quite a predicament as she is stuck with him until her problem gets resolved. Together with Hiyori and his new partner/weapon Yukine, Yato will do everything he can to gain fame, recognition and just maybe, one shrine dedicated to him.

When the end of the world came, in the hopeless darkness, Gu Qingshan broke away from time and space, and returned to the world before it collapsed, determined to change his fate. But as time went on, he gradually realized that the apocalypse is not as simple as it seemed…

<Undead> Noh Eunha.
After losing his family and closing off his heart, he just wanted to kill the monsters he loathed.
I regressed before my life came to an end in the deepest part of the <Abyss Dungeon> that was impossible for mankind to raid.
Since I’ve been reborn as a baby, let’s make this life different.
I will do anything for the sake of my happiness.
I’ll kill in order to live, and I’ll do my best to survive.
Even if I have to walk a thorny road by myself without anyone acknowledging me.
This life, I will definitely—

This is a world of magic where magic is used for everything. But deep in the forest exists a young man who spends his time training and bulking up. He can't use magic, but he enjoys a peaceful life with his father. But one day, his life is put in danger! Will his muscular body protect him from the magic users who are out to get him? Powerfully trained muscles crush magic as this abnormal magical fantasy begins!

From MangaHelpers:
From the perspective of an alien planet with super-advanced technology and tiny (1/60th the size of a human) inhabitants, planet Earth was the perfect location to banish their worst criminals. Five of said criminals were sent to the planet to be exiled, attached to little critters like frogs and rabbits so they can never be fully active. Due to an accident, these five criminals managed to escape and attach themselves to five different girls that were nearby. The one responsible for the banishment of these five criminals now must detach them from the girls by mouth-to-mouth release.