Alvis, the hero, lost his life in a battle with the Demon King. However, he lived on... as a skeleton!?

Ending his career as the hero who defeated the Demon King, he spent 3 years sleeping, playing and enjoying every day. However, in order to find his long time friend, Izana, he once again enrolls as an adventurer, and changes his name from Alvis to Al the Skeleton. Due to his appearance being that of a skeleton, trouble is not out of the question for his near future!

Protecting travelling merchants, mapping unexplored dungeons and so on; whilst undertaking numerous requests, Al the Skeleton wields his sword another day in order to save lives.

From Batoto:
Kikuno Kei, nicknamed "Kay", is a normal university student and a part-time hitwoman.

The future-fantasy world of Remnant is filled with ravenous monsters, treacherous terrain, and more villains than you can shake a sniper-scythe at. Fortunately, Beacon Academy is training Huntsman and Huntresses to battle the evils of the world, and Ruby, Weiss, Blake, and Yang are ready for their first day of class.

Note: This manga is based on the independent American 3D-CGI animated series by Rooster Teeth (created by Monty Oum). The manga itself is a prequel to the original animated series, and delves into the circumstances surrounding the four main characters.

A spin-off of the various works of Kamachi Kazuma. One day, Kamijou Touma (A Certain Magical Index) faced yet another misfortune. His toilet was broken and spraying water everywhere. As he was lamenting his misfortune, suddenly he appeared in a strange place along with Index and Misaka. Soon enough, more strange people begin appearing...

Includes:

A Certain Magical Index
Heavy Object
The Zashiki Warashi of Intellectual Village
The Circumstances Leading to Waltraute's Marriage
A Simple Survey / A Simple Monitoring
Killer Princess and Deep End

Long before any child of Earth came to the world of Tortus, the Liberators fought their own war: a struggle against the gods themselves. Oscar Orcus was never the type to seek out that kind of conflict. He lives a simple life as a magical craftsman. But when the powerful magician Miledi Reisen barges into his life, he’s swept up into the tides of history. When the two of them meet, sparks fly that will set the whole world ablaze!

Leader of hero squadron "Gerato 5 (Five)" aiming for world peace, Aikawa Fudou and fight leader of secret society "Gecko" aiming to conquer the world, Magahara Desumi ... there was a deep “fate” between the two of the organization ... !!

Mitsuru Masamune, a mild mannered high-schooler who hasn't had much of a presence since his birth one day had a roommate move in.
A silver-haired, blue eyed exchange student all the way from Germany, Leo.
They had a dignified appearance and had a cool way with their words with no room for timidity.
He used to think that Leo was a being far off from someone like him till he got to know about a secret of his after which their relation got a bit more special...?!

In this world, there exists monsters called Kajiki. They are huge and scary, for they were created to be eaten by gods. However, they are also very delicious…! Let the battles between monstrous food and a young chef begin!

Uchiha Sasuke heads for an astronomical observatory far from the Land of Fire where he joins up with Sakura and dives into an undercover investigation to search for traces of the Sage of Six Paths! There, they discover a plan that goes beyond life and death… Where will the battle take this husband-and-wife team?

Shuichi Kagaya isn't human. He has an unnatural sense of smell, and can transform into an incredibly powerful beast... of sorts. He does all he can to avoid standing out and being discovered, but no good deed goes unpunished, and his decision to use his power to save a girl spells the end for his quiet life.

Elena, who spent her entire life as a cold-blooded female knight to avenge her family, ended up dying without claiming her revenge. When she opened her eyes she found that she went back into the past. By day she was a lady in a dress, and at night she carried a sword to change history and prevent her family’s destruction.

“I want to marry you, Your Highness,” she said to the crown prince. She would do this to save her family.

During the anti-cataclysm period, the monk Chen Fanyu fell into the catastrophe of the day, but he dreamed of returning to the earth's young age in five hundred years. In the last life, I was on the top of the universe, overlooking the world, but no one was accompanied. This world is only willing to live with the right person. After 500 years, the immortal reborn and returned to the city, to make up for the regret and play the story of pretending to be the weak.

Comic Maplestory is an ongoing children's manhwa that has about 90 volumes as of December 2017. The first volume was released in 2003 and in this series, you will meet characters of the Maple World universe! Follow the protagonist Dodo and his friends as they go on various quests and learn the dark secrets of their world.

After falling into the gap between worlds, I gained “the ability to identify something’s status” for the cost of a single limitation. However, other than this skill I was completely ordinary. All I could do after landing in a strange world, was see through the status of things and use that information for my own growth.

One day, after being assaulted by enemies, a lone figure appeared and saved my life. What’s more, that person had an incredible “secret”.

Naruto was a young shinobi with an incorrigible knack for mischief. He achieved his dream to become the greatest ninja in the village and his face sits atop the Hokage monument. But this is not his story... A new generation of ninja are ready to take the stage, led by Naruto's own son, Boruto!

(Source: VIZ Media)

Spin off of main series Senran Kagura - Shoujotachi no Shinei, it portrays the main storyline from the point of view of the snake girls, and follow their misadventures, victories, and defeats when confronting Hanzo ninja, being released in Comic Rex. Different point of view from main story line, with main actors being the snake girls with focus on their academy.

Humanity's greatest gym rat Hansol, lost consciousness during a deadlift. When he opened his eyes, he arrived at a different world. Monsters appeared in front of him, and all that he could see was protein...? "I'll flip this world by working out!"

Yamada Takashi lost his life in the snowy mountains—that is what he thought, but he then appeared in an unknown place; another world that looked like the game he played. Moreover there are many things that he doesn't know... While puzzled, he still retains the strongest class ability and is relieved.

High rank magician, "Wise man" Marius is still living till today.

Three Years ago a Hero sealed a Hell Gate. The Seal has been weakening ever since, sporadically letting Monsters through. After a big Group of Monsters entered the Country through a Hell Gate, the profession of Heroes was needed again.
Touka Scott a small Radish Farmer in the southern Town of Cheza is prepared for sudden Monster Attacks. He built himself a hidden Pittrap with Bamboo spikes, to lure unsuspecting Monsters in if they ever try to Attack the Village. A Monster attacks and Touka tries to lure it into the Trap with freshly roasted Bacon, but the Monster dislikes this type of Meat. Thankfully the local Hero saves the Village from the Monster in the nick of Time. The hungry Hero tries to grab a bite of Bacon after vanquishing the Monster, only to stumble into Toukas Pittrap and Die.
After causing the local Heros Death, Touka is forced to take matters into his own Hands to protect the Region from attacking Monsters.

With Japan in the midst of a bloody revolution, an elite cadre of samurai swordsmen known as the Shinsengumi must protect the embattled city of Kyoto. Tetsunosuke Ichimura has spent his life dreaming of working at the Shinsengumi, and his wish has recently been fulfilled. As a page for Vice-Commander Hijikata Toshizo, he is privy to a wealth of secrets and is among Japan's highest ranking officials, some of whom are actual historical figures. When a strange gun-toting swordsman, Ryoma Sakamoto, recognizes Tetsunosuke and his brother as the sons of someone he calls the "Peacemaker," trouble brews and the other Shinsengumi run the outsider out of town.

Full of action, this sword-fighting and gun-toting story is centered on the bakumatsu, a chaotic and bloody time of revolution that would ultimately result in the disbanding of the samurai and the opening up and Westernization of Japan. Fifteen-year-old Tetsu must witness the war around him, and perhaps gain some amount of wisdom about the samurai.