From MangaHelpers:
Nearly half the population of Sakurada, a small town near the Pacific Ocean, has some sort of unique power. These powers range from being able to enter the mind of a cat to resetting the world back to a certain point in time in the past. There is a group known as the "Kanrikyoku" that controls and monitors the use of these powers. Asai Kei and Haruki Misora work for their school's club called "Houshi" club, which execute any missions received from the Kanrikyoku. Misora has the ability to reset the world three days. This means that all events and any memory of the past three days that "could have" happened, never happened. Kei has the ability to "remember" the past. Even after Misora uses her powers to reset the world back three days, Kei will retain those three days in his memory. Combining their powers, these two solve missions issued by the Kanrikyoku.

Mahiro thought she was all alone in the world until her long-lost brother, Ren, and his handsome, mysterious friend showed up and turned everything upside down! Competent, determined and dangerous, the two men have vowed to protect the innocent girl from the ruthless Queen Phibula, who is hell-bent on seeing her dead. As Mahiro learns more about her forgotten past, she and her handsome bodyguards must face explosions, assassins, betrayal... and the promise of blossoming romance.

Simon, once brilliant law student at the prestigious Haversford Campus, now finds himself council for those in need of representation against the occult. It's the age old Faustian tale, but this time, Faust has a killer lawyer.

A horror-mystery thriller drawn with Mr. Nohman's signature unsettling style makes us question why we live and what makes us human.

With seemingly nothing left to live for Kim finds suicide as the only means of escaping the cold reality of the world around her. That is, until one day when a stranger with an even stranger request comes to her for help. Chaos and calamity ensues as the atrocities and heartaches that have created Kim, the stranger and a mysterious Dr. Foster begin to unfold and begin to enlighten us as to how sinister this world truly is.

The story investigates the monsters among us, and the monstrous things we do to others and most importantly, to ourselves.

Fight to Live, Fight to Survive. If you want to live, reach Estancia. Your life is in your hands.

Sakia is a city of criminals - criminals who have been stripped of the memories of their past. Here, they rot yearning for the one thing they remember, their homes, their heaven, Estancia.
There is only one rule in Sakia. No one leaves without permission! The irony though, there is an escape, a train that leaves the city regularly. Is it too good to be true? Or is someone helping them, and why is Estancia the only thing they can remember?
This sci-fi adventure will have you guessing at every "checkpoint". The secrets, plots, and relationships will have you questioning every thing. Never take things at face value.

A Chibi manga of Kugiko-san.

Folklore detective Asou Daisuke would rather deal with normal, everyday, things like cheating spouses, embezzling partners and the like. (That and his huge collection of ero-manga.) Because whenever he deals with the supernatural, he gets the hiccups.

But no matter, an endless stream of desperate people come to him troubled by what he calls allegories. Those are stories, usually urban legends, that one believes to be true and if one believes strong enough can cause them to become true. His first case involves "The Man Under The Bed." Can he stop this creepy man with an axe before he chops up kawaii Hiranuma Kanae? Why does Asou count his hiccups, and just who is that strange girl in his bathroom?

First story arc of JoJo no Kimyou na Bouken series.

Jonathan Joestar, a young wealthy son living in Victorian England, has his life destroyed by a recently orphaned Dio Brando, who was taken in by Jonathan's father. Dio, who plots to drive Jonathan to insanity and inherit the Joestar fortune, becomes an unstoppable vampire that Jonathan must fight.

A long-awaited comic series which is a collaboration with the rising stars “EBiDAN39”! A teenage prodigy… and also a dropout?! Follow the school life adventures of six unique and unconventional students! Due to his excessive absences, Riku Rokuoin , who is a genius with an IQ of 270 ,ends up needing to go to a special “ Sunday Remedial Class” but the students he met there were ones of his kind!

Note: The series was simultaneously published in Japanese, Chinese and English (as Ebisu Gakuen Sunday Class Detectives) through DeNA's Manga Box app and ran for 37 chapters. Only the first 20 of these chapters were translated into English. In the published volumes, these chapters were re-compiled into a total of 10 chapters.

From Pinoymanga Scans:

In the 24th generation of Kings of the Joseon Dynasty, a boatman known as Seo-mok unknowingly helped a mysterious woman and Japanese spies who were disguised as rich Korean men to cross a river. But after crossing the river, they tried to kill Seo-mok... Left with no choice, Seo-mok then took the woman hostage--and soon, secrets began to unfold.

The education system has changed its way of punishing students. If there is a problem now, the students go to court. But its not a normal court, its made out of students and preschoolers. Attorneys , prosecutors and judges are all students. Follow the case of Tento Nanahoshi as he and his attorney Abaku Inugami try to prevail the accusations of murdering the pet fish of the class. It will be a tough process as the prosecutor is the cute and rich Pine Hanzuki.

The day of the coronation has finally arrived, but peace is nowhere in sight. The King is still under attack by a mysterious faction that is trying desperately to put an end to his life.

And this time around, the trials facing them might just be too great to overcome. His Majesty and his "Right Eye" both have secrets they're keeping from each other. Secrets that could tear them apart... And destroy the kingdom.

From Yen Press:
Sora, a young boy who lives a peaceful life on his tropical island home, is set adrift when a horrible storm wrecks the world he loves and separates him from his friends, Riku and Kairi. In another world, the Disney castle is in chaos when King Mickey goes missing, and it’s up to Donald, the court magician, and Goofy, the captain of the army, to find their king. When both Sora and the King’s allies happen upon each other and learn that the ills that have befallen their worlds are the doing of dark beings without hearts known as the Heartless, the three recent acquaintances take up arms together in an epic quest to travel to unknown worlds, set those worlds right, and find their friends!!

From LuffyNoTomo Translations:

Oz Williams is a kid genius who has a special power when it comes to helping the dead get revenge!

19th century London is the place where kid detective Oz Williams and his unusual assistant live. Oz helps solve cases that the police have trouble with and in the end, the murderer always ends up killing themselves due to a mysterious power Oz shows them in order to take revenge for the dead.

Oz has the ability to hear the dead and in the form of a Jack-o-lantern, the dead take their revenge on their killer. Oz loves sweets and always wears a Halloween costume all year round, so that's why he is known as the Halloween detective!

Vyalen, the main character in the story, is a graduating high school student from their school.Their school was pretty known as one of the best athletic and academic breeding students. In other words, only those who have special talents, elite minds, and abilities could only enter the school. Each of the students were categorized according to their major fields-- like being an elite, academic, and athletic. But, for the school's first in history they were not able to categorize Vyalen for whom he has this unknown ability that allows him to "artificially" use or create talents that he's not even used to... Moving on, within only 12 twelve days he will be graduating from his high school. That's why he is in a hurry for confessing his love to her long beloved crush, Trixy. But suddenly one morning, on his way to school, he suddenly bumped into a puny little nerdy girl named Lnear. having the thought that he had heard this name somewhere... later on. He finally realized that it was a classmate of his that must be sitting next to him that never came to school since the first day of class...

From K.I.S.S.: Everyone dreams of getting into Glory Hill, the university where successful applicants are guaranteed fame and fortune. Being looked up to as role models, the people of Korea are anxious to see what will become of the five new students which have been accepted. Watching from a distance a boy sits at the bus stop with an indescribable look etched onto his face. Original Webcomic

Viewed by some as a monstrous scourge and others as dark gods, the dragons are almost as ancient and powerful as Odin and the other Aesir, and for countless years have lived wild and free, unbowed and soaring across open skies. But things have changed. The dragons have been tricked and enslaved by the malevolent Loki and the traitorous Nidhogg, the Black Dragon. Now, their only hope for freedom rests with those few dragons who were able to avoid enslavement, one of whom was Iris. With ancient fire burning in her veins and hungry for vengeance, Iris has allied herself with the Einherjar so that she might gain the chance to burn Loki to ashes and free her captive brothers and sisters. Crystal Arena is a manga series based on the strategy game Crystal Arena, a story of the legendary Einherjar fighting alongside with the mighty gods in the ultimate battle of Ragnarok.

From Fate:
Set in a fictional European country in 1924, a Japanese exchange student meets a mysterious, brilliant girl who only leaves the library to sleep. Her brother, a detective, relies on her mind to solve difficult mysteries, several of which draw her away from the library.

Nobody know where it is, but it's a place that offers shelter to those who hate their lives or are trapped in the labyrinth of their own hearts... a mysterious hotel. Even now, those who are tired of their lives come to stay in the "Kiri no Mori" Hotel...

In 2012, the author released another chapter, not yet included on a volume, as part of the 35th anniversary of Petit Comic.

In her Ay (Aniversary Box - 2013) the author wrote that this work is unfinished.

K, a robot detective, joins the Tokyo Metropolitan Police Force’s Science Division and is partnered with human partner, Shinjo Go much to the chagrin of Chief Inspector Shiba Daizo, who distrusts the Robot. Together they battle the crimes perpetrated by the renegade conglomerate R.R.K.K. “BADO” (Robot Rental Kabushiki Kaisha – Robot Rental Company)