Takaya has fallen in love at first sight with a girl he saw at his college. The only problem is that she happens to be Yurina, the girl he spent his elementary school days tormenting. While he hardly remembers her from those days, Yurina hates him with a passion. She holds him responsible for all the lasting emotional and psychological scars that were caused by the years he made her life a living hell. Takaya hopes they'll be able to move past their history and fall in love, but can Yurina ever feel anything for him but hatred and the desire for revenge?

Kyoya Ida is a hard-nosed detective from the Shinjuku Police precinct. He is known in the force as an unreasonable type who would use lethal force to solve cases, making him unpopular with the enlisted and high-ranking officers in the National Police Agency.

Despite this fact, there are some in the force that admire Ida for his bravery and cleverness in using lethal force to solve criminal cases whenever legal means are met in a dead end.

Imagine living in a town where supernatural beings stalk the night for their next prey. Toukei Ibun takes place 29 years after Tokyo was established as the capital of modern Japan. Manzou is the owner of an inn in the town of Asakusa. His friend Hirakawa is a journalist who is investigating the bizarre crimes that keep occurring all over the city in the dead of night.

In a world where dangerous aberrations lurk outside the walls of the last human refuge, Piras, the spoiled and immature son of a war hero, must recover his identity after being classified as a terrorist and hunted down by a corrupt empire. Awaken is an ongoing webcomic.

The story is set in a middle school in Shishibone city. Tomohiro Miyajima, the main character of the story, and his group of friends are busy studying for an exam. One day, in search for a thrilling mystery as well as easy money, they take several donation boxes and fabricate a curse to scare everyone: “Ohone-sama’s curse”. After scrawling 骨 (bone) all over the chalkboards and spreading rumors of the curse, the donation boxes are quickly filled and the curse becomes a major legend of the school. Of course, only Tomohiro and his friends knew the curse was fake. It wasn’t possible for anything to happen.

That is, until they receive a donation of 50,000 yen and a letter to go with it, reading: “Please curse Tanashi Miyoko”

Immediately after that letter, bullying and crimes in the school escalated, strange incidents occur, and Tomohiro and his friends are left with a much bigger mystery than they wanted to have, that they are forced to investigate by themselves. What happened shouldn’t have happened. Those who are alive should not be alive, those who know what they know shouldn’t have been able to know, and familiar faces are hardly what they seem, but why? And how?

—Note: The world that this story is set in is the world shown at the end of Higurashi Kai, where Frederica Bernkastel meets Tanashi Miyoko and Miyoko’s parents do not die.

From bl-gyaru:

Niia is a good student who always has the top grade in his class. One day, his teacher finds out that he’s a smoker, so to receive a recommendation letter from the school, he’s willing to do anything for his teacher.

Kirishima, is a popular teenage boy and a star athlete at his school. For some unknown reason, he seems to have vanished off the face of the earth after quitting the volleyball team. His disappearance eventually became pivotal to the collection of stories about various individuals who are connected to him in some way, with each having a unique point of view about connections, relationships, social boundaries, and the similar events that revolve around them.

This story is based on the omnibus novel "Kirishima, Bukatsu Yamerutteyo" by Asai Ryou which was first published in February 2010.

Angelica North has lost her parents in a fire accident. She blames herself for their deaths, and this has driven her to darkness. Sylph Rave is an 'occult writer' who is rumored to see ghosts. These two strange, rumored characters are driven by fate to meet. How will Sylph help Angelica? What other mysterious things will haunt our troubled heroine?

2011, Seta Souji moves to the countryside to his uncle's house due to his parents working abroad. Not very friendly, he however managed to make a few friends there, and they all decide to solve the mystery behind the sudden cases of serial murders that strikes the area.

Ryu stows away on a space vessel, only to be found by the crew when it's far to late to return to earth. So they stick him in a spare sleep capsule instead. Things take a turn for the unexpected, however, when Ryu wakes up to find himself the sole survivor of the expedition, the spaceship having crash landed on a grossly mutated and wholly unfamiliar Earth. Joining forces with fellow survivors from a different crash, Ryu and his comrades fight to survive on this new and deadly Earth as they search for any humans that might've made it through the mysterious apocalypse.

In order to help their chief find a wife, the bandits kidnapped a woman from the bottom of the mountain in order to offer her up to him. The chief of the mountain stronghold, Lu Cang falls in love at first sight with the absolutely stunning beauty! However, on the night of the consummation... Warning: This involves explicit scenes of rape, torture, humiliation, and other which could offend some people. Note: The is the manhua adaptation of the novel with the same name. Each chapter from the novel was made into a volume of the manhua. There are two complete volumes of the novel with ten chapters each

Marie is trapped in a horrible situation. She's being constantly tormented by her classmates and regularly molested by her teacher. With nowhere else to turn, she finds herself asking for supernatural help from one of the seven demons of the seven mysteries of her school. All she desires is the death of her cruel classmates and teacher. How far will Marie be willing to go in order to achieve the murders that would free her from her living hell?

From MangaHelpers:

Technology has now allowed people to be numerically categorized based on their psychological, physical, and emotional traits. People have begun using this technology to standardize what everyone considers a "good way to live." They call this system "PSYCHO-PASS."

Although all people know the standard "good way to live," crime still occurs. Kougami Shinya and his colleagues are part of the governmental agency that apprehends individuals deemed lacking under the PSYCHO-PASS standard. His agency are actually comprised of individuals who were once found to be problematic for society. They are now the dogs of the government.

Yukimaru and his friends investigate the Shiroyashiki as they look for their missing friends and run into the strange Room 303.

A series of dark, atmospheric stories that explore the twisted condition of the human soul, interconnected only by the enigmatic Orochi: a perpetually young-looking woman with mysterious abilities who takes it upon herself to observe the lives of different individuals who catch her fancy, from afar.

The first half of the book is made up by the titular story, a serial killer thriller that gets all kinds of meta and crazy as it progresses. The second half of the book consists of a short interview with Kago (and Ryuichi Kasumi, a Japanese crime fiction writer) and a number of short stories. (from Caterpillar).

Contains two stories:

Chapters 1-3 -- Dokusaisha Granada
Naruse Kunihiko is an upcoming short film-maker who shares the spotlight with no one. He writes his own scripts, his own music, and uses the one-man art of claymation to realize his vision onscreen. An arrogant artist who doesn't tolerate any criticism, he operates solely on the desire for praise. So when he forms a friendship with Nakata, a journalist who has been assigned to interview him, Naruse finds himself unprepared for the trials of a real human relationship...

Chapters 4-5 -- Birthday

From Evil Flowers:

How many doors must you open before you can reach heaven? Is it after the next one, or the one after the next one?

From DrMaster:
After his mother's death, Kuro Takagi transfers to Yotsuji Private High School where his father is the proprietor. But Yotsuji is no ordinary school. It holds a strange rule of “No students on campus after dark!” On his first day of attendance, Kuro and his classmates inadvertently break the school’s highest protocol and find themselves victims of a faculty zombie attack. Although they manage to narrowly escape, this is but a prelude to more encounters with the undead, especially after Kuro discover his own blood-ties and latent zombie abilities. From there, it's full steam ahead as this dark and intense action/comedy shifts into high gear.

Compilation of short stories:

• Hotel: Since 2079 (2006)
It is the year 2272 A.D.
A computer continues to live on in order to complete a mission in a world where all life, including Mankind, has gone extinct. This is a record of those 27 million years of its heroic struggle.
• Present (2006)
Hanako suffers from a terrible disease. After awakening from a deep slumber, Hanako has only three days to live.
• Subete wa Maguro no Tame datta (It Was All for the Tuna) (2008)
Tuna have become extinct and Jun Shiozaki will do everything possible and imaginable to bring them back.
• Stephanos
Set in modern-day Japan, our main character Noriko finds out that she is pregnant with her lover Matsumura’s baby. He, however, is an important doctor with a family and everything already. Noriko wants to have the baby, but Matsumura says that it’s actually a rapidly growing cancer and that they have to remove it immediately. It might also be neither of these things…
• Diadem
A "Diadem" is a word for 'crown' that has its root in Greek. "Stephanos", which appeared in "Mandala" 01, was also a 'crown'. It seems that we could consider this the second work in a continuing series of shorts that should perhaps be called a "Crown series".