From Aerandria Scans:

Who am I? I'm Gi-ryum, a tall, handsome bachelor, and the coolest guy in the country who even makes O△ sama (Reference to "Yon-sama": Bae, Yon-Jun from Winter Sonata) cry at my beauty. One day, I received classified info of the princess enrolling in a regular high school. Huhuhu. Can I snag the princess with my irresistible beauty?! I will be the king's new son-in-law!

"What is the boundary between game and reality?"

The world is in danger. Strange juggernauts called "Angels" have started to appear all around the planet, presenting riddles called "Paradoxes" to whoever happens to be in the near vicinity. Answer right and your land will receive God's blessing. However, if you fail to solve the paradox be prepared to receive divine punishment...

Once again, the police are baffled by the serial killings of several young women. Kudou, a detective, is referred to a young girl by a friend. But this girl isn't what she seems - Kudou saw her at the crime scene. Apparently she's a vampire!!

The short stories of Tomoko Yamashita.
First girl: There was a girl in the middle of the gruesome incidents. ‘I thought that I was invincible.’
Second girl: A recollection of ‘a girl’ who didn’t love an excellent boy, ‘me’.
Third girl: The future where you are cursed when you are born. The only girl who wasn’t cursed is nervous about her undecided future. ‘She is pitiful for not being cursed!’.

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.

With the genius-level reasoning ability he inherited from his grandfather Kousuke Kindaichi, Hajime Kindaichi has solved a great number of very difficult cases. But he is just a regular high-school student. Though he wants to get closer to his childhood friend Miyuki, he can't manage to make a move on her because no matter where they go, a terrible crime always occurs! Kindaichi hardens his resolve and invites her on a one-night mini-vacation! "This time it'll work for sure!" he says to himself. As goes without saying, this manga is a comedy spin-off of the popular work Kindaichi Case Files!

The young Erwin Smith is a rising star in the Survey Corps, humanity's only hope of defeating the man-eating monsters known as Titans. Ruthless and dispassionate, Erwin’s mind is devoted to strategies and intrigue. But beneath Erwin’s feet is another world, the Underground, where humans are born and die surrounded by the garbage the Capital throws away. Here, the criminal Levi survives on his wits and agility. But when these two ambitious men cross paths, who will prove himself stronger?
The origin story of Levi and Erwin.

The protagonist, an author, tells the story of his encounter with a certain young girl ten years ago. During his college days, he once bore witness to a traffic accident wherein an elementary school student was hit by a truck. Strangely, the girl's friend, who was nearby, only went over to check on her after carefully saving the game she'd been playing just before. Soon afterwards, the protagonist found himself captured and confined by this girl.

Xolia applies for the title of "assistant to the Devil." In exchange for signing her life away, all she asks for is information. Now she's wondering if this was a good idea in the first place?

From Storm in Heaven:

Kyu's greatest desire is to become a detective. To fulfill his wish, he goes to take the entrance exam to get into the detective school run by Dan Morihiko, one of the most famous detectives ever! At the exam he meets Megu, Kinta, Kazuma, and Ryu as they all try to pass the grueling three-part exam. Kyu wants to solve mysteries, and he gets his wish: his first real case appears in the midst of the exam!

The setting of Devil Survivor 2 spans the whole country of Japan. It tells the story of Japanese high-school students who receive emails from a website foretelling their friend's deaths. Mysterious creatures invade the country, and the students enter a pact, enabling them to summon demons from their cell phones with a special Devil Summoning App.

This manga is based on the horror-style exploration/ero-game of the same name. Reiichi heads off for a part-time job interview, hoping to get money for a new bike, and his self-styled servant Kuro-senpai tags along. The "interview" is in a western-style mansion, but no one seems to be around. The two of them end up locked in the mansion and must find their way out.

In the whole world there lay a mythical creatures which have their own ecosystem and can’t be considered part of the food chain. They also have supernatural powers and live together with humans. Ferry is one of the professional investigator, who researches the connection between the creatures and humans and is called a Genjuu Chousain (Mythical Beast Investigator). The story starts when a flying reptilian dragon (Wyvern) is attacking a village, and a Girl dispatch on the quest to research and investigate Wyvern and other mythical creatures.

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.

High school students Kamijou Haruta and Homura Chika are members of a wind instrument club that is on the verge of being shut down. The two are childhood friends and they spend their days practicing hard, while also trying to recruit new members. When a certain incident happens within their school, they work together to solve it.

(Source: ANN)

Sayoko is an incredibly kind, but solitary, young kimono-clad lady who has certain supernatural abilities. She can see ghosts, and she frees them from their places of death by agreeing to let them haunt her instead. As a result, everywhere she goes, she is followed by an army of well-meaning spirits that only she can see. Her weirdness tends to throw any normal people who would have otherwise possibly become her friends.

Inaba is a poor college student who happens to accidentally run over Sayoko with his bicycle.
Sayoko normally is unable to interact with people for long periods of time, because since she is haunted she endangers the health of other people just by being close to them.... But for some reason Inaba is completely fine with being around Sayoko even for long periods of time....

...Just what's going on?

Lee Wee Jin has to cope with his tyrant sister on a master-slave basis everyday. Trying to fool himself he evades reality, thinking she's tsundere and that she really likes him. Suddenly, these delusions become all too real.

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 series of murders has been happening during the red moon. People say that it’s the work of the “Death God with a Red Scythe”…the title character of a popular mystery novel!?