From MangaHelpers:
After a terrible earthquake, Satoru wakes up in a pitch black cave that him and his friends were exploring. Desperately moving through the crumbling cave with just his backpack, he expects a warm rescue once he gets out. But what awaits Satoru was an unbelievable fact: Japan has sunk underwater due to the earthquake and he is stranded on an island with no one to help him. Can Satoru learn how to survive by himself?

What's a guy to do when a militant girl demands he date her little sister? Crazy right? Well, it's exactly what happens to transfer student Kakizaki Kokera. The Harimoto Sisters have a strange love-hate relationship he just can't help but get dragged into. And what's more, there's a strange town legend about a middle schooler who cleaned up the town with overwhelming violence five years ago called Urooboe Uroboros (Half-Remembered Uroboros).

When a genius manhua artist enters the world created byhis own pen, where humans and fantastical creaturescoexist, he is determined to become the god reigning overthis world. However, things are not as simple as he thinks.Will he become the god of this world, or will he only barelyscrape by to survive?

From Seven Seas:
Sumire Takahana is a seemingly normal school girl cursed with the ability to see malevolent ghosts known as Viruses. Her life hits a crossroads after a run-in with a gothic lolita-clad monster killer for hire, Lucia Nahashia. Not content to stay on the sidelines while these Viruses prey on the weak, Sumire reluctantly decides to join forces with the mysterious, eye patch-wearing Lucia to hunt down these Viruses before they can hurt anyone else.

Based on the Vampire Savior installment, from the DarkStalkers video game series produced by CAPCOM.

In the world of makai, there are horrible monsters that humans fear, called Darkstalkers. Lillith, a fellow Darkstalker, falls to Earth (London) and befriends John. What will he do when he finds out what she is? Will Lillith survive Master Jedah's attacks??

From Boku-Tachi:
Humans are suited to be come a warrior of the Gods world. Once proven to be the holder of an honourable soul, a Goddess - The Warrior Virgin - will lead and show those the way into the Gods world, and yet dead, their souls will be given the opportunity to walk down the path of life. Necromancer, Lezard Valeth and his young apprentice Louie meet a "Hero" from a small town. Is he perhaps one of these honourable souls and what interest does Lezard have in him?

From Valkyrie Scanlations:

The princess of the kingdom of Dipan, Alicia, was abandoned by her parents when she was still a child. The rumour says that she was posessed by a Demon and therefore lost her life. But the truth reveals different. Alicia in truth, inherits the soul of the Battle Maiden Silmeria, one of the three Valkyries, what she has to hide from the rest of the world. That of course gives people reason to think she has a split personality. She is taken to a castle far away from her kingdom and hidden from the public and ever since living a quiet life. Until that one day when Odin, the lord of the gods, decides to come after the lost Valkyrie and forces her to return to Valhalla...

"Why keep the pigs behind a fence?" "Why do you think, Jae?" Are you the pig, or are you the fence? In a small and ancient kingdom, a new leader arises. But with a new leader, means a new ring of followers-- and not all people wish to follow. NOTE: READ LEFT TO RIGHT. CONTAINS STRONG LANGUAGE AND SENSITIVE TOPICS.

Welcome to the future, in S.E. 156. Thirty years before our story begins, an ace space pilot by the name of M2 Rimstein was put into an experimental cold sleep until such time as he would be needed.

That time is now. He is unfrozen and put in command of the Dance Mania unit of three superb pilots, though two are rookies: Stellasta von Argyll, Malloy Chihaya, and Cloud Neelsen. Accelerated training commences, and new ships and gadgets are brought out so that they will have victory over their enemy.

Unfortunately, things go awry fairly soon when M2 is captured and brain-washed by a planet which sends him out to fight for the enemy. Malloy at first refuses to fight his commander, and then does so with the conviction that he can bring him home to the Great Carrier.

Bringing him home may be easy, but regaining his mind?

from Translated Treasures

From Tokyopop:
After establishing an idealized utopian country, the legendary warrior, Hong Gil-Dong, disappeared without a trace. As time passed, the people of the land began to forget about Hong Gil-Dong, who had been enjoying a peaceful existence of anonymity in a small village. Until one day, when a band of unknown warriors invaded the village, leaving it in utter ruin. Now, Hong Gil-Dong has returned, determined to raise his village from the ashes-but in order to accomplish this he will need funds. And so he finds employment as a bounty hunter, capturing wanted criminals. Then, in a twist of fate, Hong Gil-Dong inadvertently rescues the daughter of a wealthy merchant from a kidnapping attempt. Consequently, he is hired on as her bodyguard, and charged with delivering the girl safely to her father. But evil forces lurk in the shadows, observing the hero's every move-waiting for the opportunity to strike.

*The manga is already subbed to volume 3 chapter 20 and it's still ongoing!*

11 years ago, Eun Sung-min was one of the few survivors from a village that experienced the "Evil Phenomenon". He and his maid were saved by the mysterious Phantom King and his group, Phantom. Now the Special Environmental Protection Agency is searching for the answers to what happened on that fateful day, and how to combat the "Evil Spirits" that caused such mayhem. By Dredshi Scans Prologue (From Volume 1): The great 'incident' of Yong-Ah city has made the whole world acknowledge the 'Evil Phenomenon' as a disaster and the enemy of humanity. 11 years later, the survivors have reconstructed Yong-Ah city, overcoming the horrible incident and finally leading a peaceful life. Eun Sung Min, living with only the family maid, is one of those survivors. But there was a faint memory that resurfaced through that painful memory... "Phantom King"; and, a stranger who appeared one day, Choi Seung Cheol, explaining the dangers of the new 'Evil'. He convinces Sung Min to fight the covered truth about 'Evil'. What choice will Sung Min make in the face of this upcoming danger....?

Vongola GP (Gran Prix) is spin-off series of Katekyo Hitman Reborn!, made by Takayama Toshinori. Manga introduces Tsunayoshi Sawada, called No-Good Tsuna who is descendant of world's legendary racer, Primo and his side-kick Gokudera Hayato. They battle on various members from the original Katekyo Hitman Reborn! plot.

Alternative Universe where the American government became corrupted and immoral. The only thing that seems to be good is an organization called SPIDER. Little did people know, SPIDER is the center of corruption itself. SPIDER specializes in experimenting on humans to create human weapons.However, a group of experiments teams up with a police officer to make their escape and fight against the organization.

A Violence Jack one-shot from 2001. What happens when Jack and some bikers mysteriously get sent back into the age of samurai.

Reincarnated to a werewolf magician, the Protagonist Vyett was instated as the vice head of the Demon Lord's third brigade force. Occupying a remote market town, he was entrusted to management and defense.

"As a former human, born a monster, I can understand the sentiments of both sides well enough. Because of that, those around seem to think I'm a man of wisdom, or something of the like, but it's really just one trouble after the next. I have to follow those monsters that are overly quick to resort to violence, and do something about the humans, who start to complain immediately. So today as well, I'll do my best at managing the Demon Lord's main force."

Official manga page

A peerless master from the mountains and a mysterious jade that can predict the future…

Our MC Lin Yi is an ordinary high school student with a mission: to make the schools top beauty fall in love with him. Furthermore, this was assigned by her father.

Although Lin Yi doesn’t want to deal with the stuck up beauty, it is his elder’s order, causing him to transfer into and becoming beauty’s attendant. Thus, the story of the overpowered attendant becoming the schools beauty’s personal bodyguard was born.

Description from Gravity Tales:
An assassin of legend returns to the cities, fueled with a new calling and a higher purpose- to hit on girls and protect the school beauty!

"I'm her bodyguard, so don't get too close... I wouldn't want the Miss getting jealous again."

From [Fujoshi Bitches]
Narasaki Naoto was born into a family of thieves. After committing a marriage scam, he is arrested and taken to the upscale apartment of elite detective, Oogaki Kaoru.
“I became a detective in order to distort that pretty face of yours.”
As the good-looking Kaoru with a stalker tendency calmly says that, Naoto slowly warms up to him as their peculiar living arrangement starts.
A love story of captivity between a forceful detective x con artist.

Almost five hundred years from now, life on Earth struggles to survive in the aftermath of an apocalyptic war. Beasterians, scientifically created human/animal mutants designed to be strong, disposable soldiers, are now the masters of the remaining humans. Humanity’s one hope is the birth of a savior who will lead them out of the darkness. Before that time can come, however, three angels, all superb warriors, must fight to save the life of the Holy Mother.