Itou Kaiji is a bum who steals car emblems and slashes tires on what seems to be a regular basis. This routine changes one day when he is paid a visit by a man in a trench-coat. Once the two get talking, it seems that the visitor (Calling himself Endou) is a debt collector. The reason for his visit is an unpaid loan which kaiji had previously co-signed for a work-mate (Furuhata Takeshi). The original loan was 30000 yen and once Takeshi had disappeared, the loan then fell on Kaiji.

Kaiji is then told of a way to clear the interest compounded debt (which stood at 3,850,000 yen), which involved getting on a boat with others in his position. Once on the boat the debtors would then have to gamble with loaned money, which would end with a few winning, and others getting into deeper debt and having to work to pay of their debts. After some coercing kaiji accepts a position on the boat, in order to clear himself and make a bit of money as well...

The Kirionira are the demons that live in another dimension and invade the human world through people's dreams. The only defense humanity has against the demonic assault are the hunters who rely on their sex drive as a source of power to fight against them.
Riku Yoichi came from a long line of hunters and had high amounts of sexual energy which allowed him to be a great hunter. He moved away from his home town after middle school to demolish the Kirionira and was successful in finishing off the king and ending the battle forever. However, the peace came at the price of Yoichi losing his sex mojo.
Returning back to his home town, he soon learns that the demon invasion was not over, but without his sex drive, he is helpless to fight back. He tries convincing his childhood friend Namba Midori and her female classmates to get him sexually aroused, but they want nothing to do with it.

Based on the Nintendo DS / Playstation Vita game of the same title.

Inside every living thing is "Spiria", the core of each soul. Recently, there is a disease that contaminates people's Spiria, known as "Despir Disease". Despir Disease turns out to be due to the presence of Zeroms, the dream eating demons that are believed to only exist in fairy tale, inside a person's Spiria. The way to cure this disease is to link into their Spiria, called Spir Link, get pass the Spir Maze, the labyrinth created by the Spiria and defeat the Zerom before it consume all of that person's Spiria. This can only be accomplished by using Soma, the weapon which allow the person with strong Spiria to link into other people's Spiria and defeat Zeroms.

The story focuses on a young man, Shing Meteoryte. After his grandfather leave the quiet village where they lived in, Shing went down to the nearby beach, only to find two people lying unconscious ashore. Those two people turn out to be Kohak Hearts and her brother, Hisui Hearts. The meeting of Shing and Kohak sparks the start of his first adventure out of quiet village to the world...

A tale of love in all forms: pure like a child's, twisted like that of a scorned, lonely woman, and multi-faceted in between. Kurt, the prince of a faraway kingdom, leaves home to find a way to heal his petrified goddess-mother. Battling numerous monsters, overcoming challenges set forth by Medusa's apostles, and helping other people all seem so heavy for a ten-year-old boy. But never fear, he's not alone. His youngest aunt, a goddess from heaven, his girlfriend collected along the way, his-not-quite-adversary, not-quite-friend, mysterious dark apostle and various others are with him. All are drawn in by his charisma, his will, and his purity. Let's join Kurt, to travel to far, far away lands, to meet interesting people, monsters, gods, and goddesses...and then to kick their asses.

Hero is a dramatic adventure manga set in ancient China.

From Tokyopop:

When 10-year-old Wataru's father leaves home and his mother is taken ill to hospital, he decides to change his fate by travelling through the magical door shown to him by his friend Mitsuru. In a land of magic and monsters, Wataru must summon all his courage and embark on a journey with several comrades to meet the Goddess of Destiny and change this "mistaken fate."

From ryColaa:

There are mysterious masked-men trying to conquer the earth!! And to defeat them, the state started a project team called 'Rebirth Knight'.

Kang Chan, one of the strongest high schoolers, meets a girl named Chaewon and falls in love at first sight. However, Kang Chan hears from Chaewon that she is a member of the Rebirth Knights, and decides he wants to be a member too...

China: 184 A.D., a time of great turmoil. A young drifter named Zhang Fei stumbles upon a slaughtered village and encounters the volunteer army of Liu Bei. He joins them in time to help in the defense of a walled city. But later, while attempting to save the life of a little girl, he's struck by an arrow and thrown off a cliff. Rescued by two wizards, he is revived and given great powers. But the price could cost him his very soul!

Note: the series appeared in Kodansha's defunct Young Magazine Uppers, continued in Flex Comix Blood and then transferred to Flex Comix Next.

The daily lives of an extraordinarily jealous (yandere) girl, Hiyori Koharu, and her boyfriend, Minoru Fujito Original Comic: http://www.pixiv.net/member_illust.php?mode=medium&illust_id=44979493 Motion Comic: http://mcs.ensoku.club/con/965?from=rankingBox&culture=en_US

Gangnam in complete darkness…
"Am I the only one alive? What’s going on?"
… A boy wakes up to find himself in a building full of dead people. No cars, no electricity and no stars in the sky… Not only Gangnam, but the entire city seems deserted.

From Manga-Sketchbook:

In the previous "Kung-Fu Boy" series, Chinmi became the master of Kempo at Dairin temple, where he trained disciples. When they lose contact with Kyorinji, a temple of the same sect, Chinmi is dispatched to the Kanan Autonomous region to investigate.

He tries to enter Kanan with Pushin, a swordmaster whom he met traveling to Kanan. But they are attacked after trying to enter Kanan and pursued by the Border Police who chase them into a waterfall. A fisherman saves them and aids their entrance into Kanan. The people of Kanan are forcibly oppressed by the government. Chinmi befriends the people and makes the big decision to free them with his Kempo. Sorabi Boru, Lieutenant of the Border Police and Jirai, the evil king of Kanan attack Chinmi...

The manga adaptation of the latest RPG in the Persona series from ATLUS: Persona Q: Shadow of the Labyrinth. One stormy autumn night, the P3 gang is bummed that Gekkoukan High School's Culture Festival was canceled due to the weather. But out of nowhere, they hear a bell begin to ring. The next thing they know...

A mysterious beautiful woman hosts a death match that results in either death or rebirth. Pitting an Expert who reaches the peak limit as a result from training against an Esper who awakens latent superpowers from within, the chosen players will bet on their lives with a fight to the death! There can be only one survivor.

Aihara Shinobu is a high school student and lovely model. One day in Shibuya, she's handled roughly by a gang leader named Kyou, who insists he will make her his woman unless she can produce a boyfriend. Shinobu turns to her unrequited love, a true gentleman named Hibiki, the utter opposite of Kyou, and begs him to play the part. But what Shinobu doesn't realize is how long Kyou and Hibiki have waited for this moment...

Dio is a rock vocalist that got stuck in a battle against the Hell Princes on Earth. In between his glamorous rock & roll life, his pop idol "sister", and being chased by his bitter past, he has to fight the creatures from hell that are trying to kill as many human as possible. This is a start of a Rock and Roll Action Series!

Retired soldier Araki Kyosuke returns to Japan to settle down for a quiet life but when he meets heir to a big corporation Mimasaka Lune, old memories of a former life flash into his mind. Reluctantly, he becomes Lune's bodyguard to protect his protégé from attacks while learning of their past lives.

During the early 20th century, along with technological advancements, scientists were able to develop sophisticated magic. The combination of science and sorcery was Makinot, circuits made from spells that were put into objects to bring them to life and even gain a personality. It was developed as a military weapon and has now spread throughout the world. Akabane Raishin is now attending the Royal Academy to become the best in the world. Accompanied by the lovely teenage girl Yaya, who is actually Raishin’s puppet weapon, he plans on rocketing to the top of the class. However, his test scores come nearly dead last although his combat skills and determination are second to none. Raishin has to compete with the deadliest of classmates if he wants to come out as the king.

Redix and Kai lived a simple life , but suddenly and for unknown reasons , they started some commits for riot in the region . Currently they are studying the last year of High school , So they decided to stop those works for the purpose of finishing school, However .. One day they escaped from school just for fun and playing around ! But suddenly for strange reasons they found themselves in another world seemingly devastating and empty of its inhabitants ,but who knows if there are other people in this world or not ? and why were they transferred to it ?

"You can do anything if you put your mind to it." That is how Mio was raised... if you could call it that... by her rather lazy guardian Reki. Born on an island she has never been away from, Mio grows bored of her everyday life... That is until Sarah comes along.

Sarah is a member of an organization that explores and manages many "Homes", islands much like Mio's. For Mio this is her ticket to adventure, excitement and the most interesting thing of all... school! But is the school ready for Mio?

From Village Idiot:

Hideo Kawamura has a really terrifying look, but soft heart. While contemplating suicide, he stumbled upon this computer that contained the virus, "Wiruko", who convinced him to join the "Seimahei", a fighting tournament that has the world as its prize. However, Hideo happens to not have any fighting skills whatsoever, so he has to get through on his wits (and luck) alone.