A highschool girl stands at the edge of a building, about to take her own life. She then witnesses a brutal stabbing down below by a hooded man. She is instilled with fear at the mysterious man's cold bloodedness, cowering as he suddenly appears on the roof.

Aboard the Advenna Avis in 1711, a group of alchemists summon a demon in the hopes of gaining eternal life. The demon gives them an elixir of immortality and the method of ending their existence by "devouring" one another. Soon after, one among them begins to devour his companions. Realizing the danger posed by staying together, they scatter across the globe.
Centuries later in 1930's America, a certain federal investigator tries his best to combat the rise of organized crime during Prohibition, send a particularly infuriating terrorist to Alcatraz, and catch an outrageous thief duo. Meanwhile, the transcontinental train, the Flying Pussyfoot, begins its trail of blood across the country.
In 2002, a small group of the original Advenna Avis alchemists are on a journey to find the rest of their fellow immortals. However, there is one companion they did not expect to meet again.
Seemingly unrelated events, from a sleepy Italian city in the early 1700's to a modern luxury cruise ship traveling across the Pacific, reveal themselves to be far more connected than anyone could imagine.

From MangaHelpers: The Black Museum holds criminal memorabilia from the many cases that have been investigated by Scotland Yard. In this fictional re-imagining of the popular legend, a visitor comes to see a piece of particular interest, the leg of Spring-Heeled Jack. When the curator guides him to the piece, he begins to tell his story of the case of Spring-Heeled Jack, which began in the late 1830s. The earlier adventures of Spring-Heeled Jack involved an eccentric nobleman named Walter, who used his specially made suit to harass women. After an encounter with a very strong-willed woman named Margaret, Walter hung up his Spring-Heeled suit for good. Three years later, Spring-Heeled Jack returns, this time with a penchant for murder. Detective James Rockenfield first suspects Walter, but soon it begins to seem that someone else has taken up the mantle... [tethysdust]

An ordinary girl with a flute through her head! Mundane days of "kill or be killed"! Short stories loaded with love and dream and dead people, start now! Source: http://www.u17.com/comic/16179.html

Hiro's brother Atsuya is dating Hiro's childhood friend and secret crush Hikari. Hiro's affection for Hikari will lead him to commit an un-punishable crime against his older brother. At least, he thinks it is un-punishable, until he is kidnapped and imprisoned by a group of people wearing animal masks. The judging is about to start! Basicly same principles of "gore Game of concealed murderer" as in Doubt.

As kids, Rei always protected her best friend, Ichino. After being separated for eight years though, their roles have reversed: Rei is now bullied by the girls in class and Ichino is more outgoing. But Ichino says she’s become stronger for Rei’s sake, so she’ll protect Rei no matter what...

A collection of Rei Mikamoto's one-shots.

Three of the one-shots were originally published in "Bijo Amanda".

It's an epidemic of accidental death! Multiple college students receive odd voicemails from themselves, messages from the future, and all they contain are the screams of their own deaths. A few days later, at the date and time of the message's posting, they die in mysterious accidents, and oddly enough, each have a candy in their mouths.

With the space program attempting to travel to Mars, 21st century scientists were tasked with warming up the planet so that humans could survive on its surface. They came up with an efficient and cost effective plan of sending cockroaches and mold to the surface so that the mold would absorb the sunlight and the insect corpses would serve as a food source for the mold.
It is now the year 2577 and the first manned ship to Mars has landed on the planet and the six crew members are ready for their mission. But what they find are giant mutated humanoid cockroaches with incredible physical strength. The crew members are easily wiped out, but not before sending a transmission back to Earth. Now, humanity will send elite warriors to exterminate the mutated bugs and claim back Mars.

Note: Was nominated for the 6th Manga Taishou in 2013.

This series is a complete remake of the original Mao Dante, with new designs an a story slightly inspired by the anime of 2002. This time, the timespan of the story is longer, the character design is different, and all unanswered questions left when the original series was interrupted, are answered. This time, Mao Dante has a proper ending.

From Easy Going Scans

Young Ma Go-eun and her father are about to be evicted from the haunted house they've run throughout the years. But Go-eun is not about to let the park owner demolish their haunted house and her memories of her childhood and her mother. She resolves to go to the United States to surpass trials and get a million dollar cash prize awarded to those who can survive a stay in Ghost Jack's House.

Compilation of short stories, each about two girls hunting for mermaids to win their true love.

Human beings always thought that they are the only intelligent lifeform, but that is not true. This there are lots of things happening in the world that human science is unable to explain, within the human world, feral humans are appearing, they look human but they are a threat to the human species. they have been named " Sha / Evil " human being are totally unable to deal with these "Sha/ Evil" before "sha/Evil" was known to the general population, a group of mysterious individuals formed an enforcement department - Song of the black night

A mysterious illness is spreading rapidly through the halls of Fujimi High School. In a matter of hours, the campus is transformed from a place of learning into a hive of nightmares, as the infected students collapse and are reborn as flesh-hungry zombies! Only a handful of students escape the initial outbreak - among them Takashi Komuro and his childhood friend, Rei. He manages to protect Rei from the initial onslaught, but how long can Takashi and the other students hope to survive when the whole school - maybe the whole town - is out for their blood?!
Incomplete due to the author´s death

A young man called Gil wanders out onto a snowy mountain, hoping that he’ll die there. However, Gil is saved by Torta, a zombie who’s determined to find a way to die. The two of them form an unlikely friendship and learn that living

Puuka is a an unpopular bikini model. On the way to a spot for a photo-shoot, she and her manager hit a zombie with the car. When Puuka tries to escape she gets bitten and turns into a zombie herself. How will she continue her career as a zombie?

Set in Yokohama, this is the story of a vampire with a death wish and a priest with a "survival wish."

After hundreds of years, Mary - an immortal vampire who wants nothing more than to go to his final rest in peace - manages to discover the whereabouts of Maria, a legendary exorcist who has "Maria's Blood," which can be used to kill immortals, running through his veins.

However, this particular Maria is merely a descendent, and is himself clueless about vampire hunting. Despite that, having inherited Maria's Blood means he's constantly being targeted by vampires. Mary thus makes a deal with Maria: in exchange for Maria's discovering a way to kill him, he will protect him from those who're after his life.

Note: This manga is not BL.

A strange case occurred in London at the end of the 19th century. What is the true face of the vicious criminal roaming the city? The famous masterpiece epitomizing the phenomenon known as split personality is adapted into comic format!

A number of strange events are taking place in a curious town called Otonari. What is this mysterious girl, Punk, trying to achieve as she races against time?

After 12 long years, a white-haired boy by the name of Iori comes back to Mashira village, the place where his childhood trauma began, only to find yet another horror awaiting him.