From Kirei Cake: Meet Sakai Hiroaki, a high school teenage mastermind with a genius-level intelligence and a lack of interest in anything that is easy to him. During one unlucky day, in an attempt to stop a student from committing suicide, he ends up committing suicide himself. After he awakens, he finds himself not in the real world, nor in heaven, but in purgatory, along with a group of others who did the same: commit suicide. Sakai discovers that he and his peers are subjected to never-ending intense death games in this world for reasons unknown to him, and he tries to find a way to escape. 

From MangaHelpers: For the entirety of his life, Yokoda Takashi has been drawing erotic drawings and it has been his way of expressing his sexuality. And now, he has managed to become a successful erotic comedy manga author for a monthly magazine. His series stars a character named Aimi who is actually based loosely on his niece with the same name. He keeps his job a secret, especially from his family from the fear that using Aimi’s name in such a perverted way would cause hatred from everyone. But his manga’s popularity rises and gets moved to a weekly magazine where there are vastly more readers and it seems like only a matter of time until the truth comes out. Takashi has to struggle between protecting his secret while keeping up with the production and erotic creativeness that comes with a weekly magazine series. [vyc]

A C-rank killer from the assassin organization “Glory Club,” Byun Hogil somehow ends up becoming a lawyer. Where there’s sky, there’s also rock bottom! Set in the same universe as [Killer Pietro], this is the story of our ordinary, small-time citizen-killer Byun Hogil, who never even got close to the legendary Pietro.

Hatori is an average teen boy with no passions in life. One day he meets Furuta, a girl with a keen eye for the extraordinary that's hiding in the streets where they live... Small wonders can change the world in this (extra)ordinary coming of age series!

What makes a 'proper adult'? Inspired by the words of his late father, Yutaro Urashima sought to become an upstanding member of society by developing and strictly adhering to his own "Articles of Adulthood." Little did he know, however, that those same articles would go on to dramatically change the world...

Her name is Mimi, she's a completely normal and well adjusted human being.
This is her story.

It feels like I (27 y/o) who specialized in [Training] skill was no longer necessary for the Hero’s party which has grown stronger for a certain degree. At first, I was the center of the party but in the end, the hero dismissed me from the party. However, because I have「Made a great contribution to the party until now」, I received a small「Fief」instead of retirement money. As my heart felt the loneliness of leaving the adventures front-line and heading to my territory, I thought something after seeing the seven villages with their 2500 population. My thoughts are the following… I wonder if I train these people, won’t my territory become strong enough that could even defeat the demon lord?

Due to the school bully's threat to get him game items, Ha Do-wan, the unlucky game shuttle, died after playing games all night long for a week. The moment he died, he got respawned to the classroom one week before he died... Everything is the same as that day. The only thing that has changed is the floating in front of him! What? Use the skills of the games I've played so far to beat the bully?!?!

In the imperial court, a young woman is put into servitude, Maomao. The tale is just beginning for the woman doctor/pharmacist from the red-light district, as rumors circulate about the emperor's children's lives being short-lived. Her curious nature and thirst for knowledge pushes her to action. To satisfy her curiosity, this young doctor/pharmacist will investigate the origin! What is shifting in the imperial court..!?

http://www.jp.square-enix.com/magazine/biggangan/introduction/kusuriya/

A prodigy of science and a solitary genius—yet terrible at so many things!?

Poor university student Sanosuke Saraki unexpectedly reunites with his admired genius classmate, Koharu Kobachi, at his part-time job back at his old school. However, this supposed genius is now a "5th year high school student" who has repeated her second year in a row...! Saraki's mission is to "make Koharu graduate by the end of the year."

Well, I was reincarnated! And my father is a former hero? And my mother is a queen of the spirits!? With my knowledge of my past life and my powers in this world... I'll protect my family's happiness!

Before the Pirate King was executed, he dared the many pirates of the world to seek out the fortune that he left behind in one piece.
As a child, Monkey D. Luffy dreamed of becoming the King of the Pirates. But his life changed when he accidentally gained the power to stretch like rubber...at the cost of never being able to swim again! Now Luffy, with the help of a motley collection of nakama, is setting off in search of "One Piece", said to be the greatest treasure in the world.

Note: The best-selling series in manga history.

Was a finalist for the Tezuka Osamu Cultural Prize from 2000 to 2002. The German translation of Vol 44 won the Sondermann audience award at the Frankfurt Book Fair Comics Centre in 2005.
Won the 41st Japan Cartoonists Association Award Grand Prize alongside Neko Darake in 2012.

In the early 20th century, a small republic found itself stuck between a kingdom and an empire - both of whom wanted to manipulate the republic to suit their own needs.

In order to protect itself from both sides of the conflict, the republic created a small group of soldiers whose job it is to suppress revolution and dissent in any way possible. This is the story of the Opera House.

Daichi and Akira have been childhood friends forever but have only started dating recently. While Akira is very much a tomboy, there are some parts of her that are surprisingly girly?

In a world where the Han Empire never fell, martial arts is a power used to squeeze the people dry. So when a new continent is discovered, both good and evil men alike flee to settle there and escape the tyranny of the Emperor, opening up the era of a Martial Wild West.

In the turbulent frontier, Zhang Qian is a man that reincarnated from our cushy, modern world, but his new world is nothing like the fantastical world he dreamed about from reading martial arts novels. While the martial arts in his new world are powerful, they are also too crude and lack elegance. And so Qian journeys the new continent for his dream of bringing true martial arts back to the new martial realm.

Manga version of the same-name anime. Enma-kun (a flame-based boy) along with Chapeauji (a demon with the form of a hat), Yukiko-hime (an ice-based girl) and Kapaeru (a Kappa) form the demon-hunting squad sent by Enma-Daio, the ruler of Hell, in order to capture escaped demons. With the help of the human boy Tsutomu, the Yokai Patrol fights the demons they encounter to stop them from causing mischief.

Gu Yangchun, who betrayed the Orthodox sects, became a demonic human under the Heavenly Demon.

Living as a demonic human, he led a life filled with regret. He committed countless evils not of his own accord, but under the orders of the Heavenly Demon.

In the Great Orthodox-Demon War, thanks to Wi Seol-ah, who cut down the Heavenly Demon that made even the three supremes of the Orthodox forces kneel, Gu Yangchun was taken prisoner by the Orthodox forces and suffered for his sins.

With whatever morals he had left in him, he died giving Wi Seol-ah information about the Demon Cult due to a bind the Heavenly Demon had placed on him.

Then, for some reason, Gu Yangchun regressed to when he had first met Wi Seol-ah. Realizing the regression was not a dream, Gu Yangchun decided to live a quiet life. However, bad ties from his previous life began to draw near, one by one.

Zeke Draker, the first direct descendant of the Dragon Slayer family to fail awakening. Possessing the talent of a healer instead of a swordsman, he was cast out by his family. Struggling desperately to grow stronger, Zeke met a tragic end.

At the moment of his death, mysterious words appeared before his eyes:

[The soul of an Elder Dragon is engraved upon the will of the one who persists.]

[An irreversible, promised power is being activated.]

When he regained consciousness, he found himself back in the Dragon Slayer family that had abandoned him, 20 years in the past.

"If I can become strong, I’ll make use of anything and everything."

Armed with a newfound, immortal power, the legend of a Dragon Slayer in a class of his own begins.

I, Maehara Maki, someone who couldn’t make any acquaintances or friends in high school, finally had someone I can hang out with outside of school. A girl.

Her name was Asanagi-san. The boys in my class called her ‘The class’ second cutest girl’ behind her back.

On Fridays, she would refuse her best friend, Amami, ‘the cutest girl in class’ invitation just to hang out in my house with me.

Together, we played games, watched some movies, read some manga while eating junk foods like pizza and hamburgers, and chugging cola without a care in the world. To others, we may seem sloppy, but it was a precious, secret time together for Asanagi-san and myself.

When the Devil King announces his retirement, he calls forth his two sons, Yomi and Sora, to give them each a quest. Whichever of them finds a pure Yamato maiden within a year would inherit the throne of the Devil King, while the other would die. Thus begins Sora's sex-fuelled adventure to find a woman that can satisfy his father...
(Sakigake!! Otokojuku Wiki)