Tsurara Takahashi is a middle school student who belongs to the Shinzen tennis club. However, she carries a great misfortune that she cannot confess to her friends: she met the mysterious Mahou Shoujo Site and was given a stick in the shape of an electric drill.

Viewers participate in a heavily advertised new quiz show where the winner earns one hundred million yen. But waiting there is a cruel game of death and competition. What will be the fate of the ten finalists? And just what is the true purpose of the quiz?

Everyone thought that the murder mystery had been solved. Everyone except for her, a seemingly normal girl who saw the true identity of the killer in a dream. With the advice of a mysterious and breathtaking man, she filed a report with the police. Now, the killer is coming after her.

Seven stories adapted from the horror of Hokazono Masaya.

This is a continuation of it's prequel, Kuro Ihon.

A boy wanders into a mysterious forest one night.

Aoi and Haru and secretly dating. However, Aoi notices that Haru has been worried about something, and the next day, he sees her fall from the roof of the school. He then discovers that she put a chart of relationships into his locker, and marked five of them as "clowns" who are trying to kill her.

A young man named Furuya contemplates the accidental death of his girlfriend, Sara.

This is a oneshot from the 90′s Four Seasons Award Anthology.

Manga adaption of H. P. Lovecraft's "At the Mountains of Madness" novel.

The story details the events of a disastrous expedition to the Antarctic continent in September 1930, and what was found there by a group of explorers led by the narrator, Dr. William Dyer of Miskatonic University. Throughout the story, Dyer details a series of previously untold events in the hope of deterring another group of explorers who wish to return to the continent.

The story has inadvertently popularized the concept of ancient astronauts, as well as Antarctica's place in the "ancient astronaut mythology".

From CPM:

In the future, alien invasion is a daily occurrence and everyone must be prepared. Elementary School #9 has assigned three students to fight off the extra-terrestrial threat.

You have three choices:
1. Accept that you are dead and await reincarnation in Heaven.
2. Deny that you are dead, and wander the mortal world as a ghost.
3. Curse one mortal to death, and suffer forever in Hell.

In the tale, an unnamed narrator pieces together the story of an area known by the locals as the "blasted heath" in the wild hills west of Arkham, Massachusetts. The narrator discovers that many years ago a meteorite crashed there, poisoning every living being nearby; vegetation grows large but foul tasting, animals are driven mad and deformed into grotesque shapes, and the people go insane or die one by one.

Alien lifeforms have taken refuge on Earth to start their lives anew, however these beings don’t seek cohabitation, they want to phase humanity out; Working together, these Aliens prey on human flesh and spiritual energy and can implant their essence on human females to bear their children. Benimaru is one of these children, but his mother also happened to be a Medium. By manipulating Benimaru’s spirit while he was in the womb, she managed to give him a human heart. For this, she was brutally killed and devoured by Benimaru’s alien father. From that point on, Benimaru swore to exterminate these creatures. Half-human and half-alien, one man wages war against an entire race!

Minita Kokage, a man who was bullied in his past due to his unfortunate name, encounters something unbelievable while working his part-time job that causes his daily life to suddenly change.

When you thirst for revenge, there's a surefire way to get it: Simply go to the strange website that appears only at midnight, and enter the name of your enemy. The Hell Girl will appear to drag your tormentor to eternal damnation. But you will have to pay a price… your soul!

Series of stories about Parasyte, from various notable mangaka.

A series of mysterious murders without injury are happening in Tokyo, how will Kumoi Soutarou react to them? A Oneshot from Miracle Jump!

From DrCoke at MangaHelpers:
A detective hunts for clues on the impossible "alibi" of the mysterious girl, a suspect for the murder of her own parents, who testifies that she has the uncontrollable and spontaneous ability to transform into literally anything. This collection of short stories is filled with mysterious and fantastic plot, introducing you to the fantasy worlds of Kawaguchi Madoka!

A spin-off to the popular zombie manga I am a Hero, set in Nagasaki.