Genre - Mystery

Large mysterious alien ships have been looming above Japanese towns for three years, filling the sky. Everything changed three years ago. And yet, nothing has changed. No weapon used against the invaders' ships had any success, beyond destroying part of Japan and leaving its economy in shambles. JSDF is fighting a guerrilla battle against the aliens all over Japan. America is joining the 'war' effort with more aggressive tactics, dividing Japan over the pacifist principle laid out in Article 9 of the Japanese constitution. But this may just be the mundane story of young high schoolers. "No matter what happens, I won't back down. At least not until this world filled with lies and deceit crumbles away. The real threat to humankind is not invaders, but me."

If you take the midnight train by mistake, take a look around you, is it the same world you are familiar with? If not, hold your breath and face your fears...

Light Yagami is an ace student with great prospects--and he's bored out of his mind. But all that changes when he finds the Death Note, a notebook dropped by a rogue Shinigami death god. Any human whose name is written in the notebook dies, and now Light has vowed to use the power of the Death Note to rid the world of evil. But when criminals begin dropping dead, the authorities send the legendary detective L to track down the killer. With L hot on his heels, will Light lose sight of his noble goal... or his life?

A one chapter sequel of the Death Note manga which tells what happened 3 years after it all ended.

Climaxing Exorcism is an indecent and obscene ability that does nothing but make an opponent purify and ascend by causing them to reach orgasm. In this world, where monsters and evil spirits are common and exorcists are in demand, promising students attend the renowned Taima Academy. Enter Haruhisa Furuya, a client of the reviled peaking expulsion and Misaki Souya, a young lady with a hostile stare equipped for uncovering individuals' mysteries. This is the narrative of how the people who were known as the most obviously awful, absolute lowest grade exorcists become the most grounded ones ever.

Deka Wanko tells the adventures of Ichiko Hanamori, a rookie police detective, assigned to Squad 6 Investigation 1 Department. Not only does she have to prove her worth to her fellow male colleagues (that includes her brand new partner, Kirishima, a young hot-headed detective) but also to the top #1 award-winning police dog, Michael! (Source: Deka Scanlation Group)

From DrCoke at MangaHelpers: Humanity has found the perfect energy source that gives the wielder near god-like powers. This energy source has been named "Demon". The rare individuals that have the capabilities to wield this power are known as "Mediums". To become one of the Mediums, Taichi has transferred to the Meissner School. On the first day of transferring into the school, he literally runs into an energetic girl named Nui. She is a Medium and attends the Meissner School. Taichi will require her help to become a Medium himself and survive against hostile Mediums.

16 year-old Kudo Shinichi, a famous High school detective, treats his friend, Mori Ran to a theme park named Tropical Land. After solving a murder case that occured on the same day, Shinichi notices and tails two people in black. However, one of them notices Shinichi and knocks him out. Instead of killing him, they gave him an untested poison that was supposed to kill him yet leave no traces. However, instead of killing him, it shrunk him into a 8 year old boy. Shinichi now goes under the name Edogawa Conan.

The Comp is a popular portable game system that also functions as a smartphone. But it suddenly becomes a portal for demons to travel to the human world! Kazuya receives three Comps, from his master programmer cousin Naoya, for himself and his two friends Atsuro and Yuzu. In order to survive the demon invasion, the trio have to use the Comps to summon and subdue the demon that appears in order to fight back against the waves of demons that are about to swarm Japan!

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.

In this present reality where "stones" are at the focal point of life. A metal expert visits an underground town and meets a kid whose left foot is frozen. The two go on an excursion to save the kid's family as expert and understudy.

Takaomi Matsubue and Arika Togawa are second-year students at the same high school. By some strange quirk of fate, they started dating. Matsubue-kun is a really weird guy (in truth, other people just don't understand him), which causes Togawa-san to ponder: "Why do I like this guy anyway? Why do people fall in love?" They encounter a profound mystery: Tsugumi Yoshimoto, a girl who has been sleeping, sleep-eating, and sleep-walking for half a year. According to Touko and Rinko Mishima, sisters who are also well-acquainted with the structure and interpretation of dreams, this is a matter that concerns them all...

Bells that are called gods. The past and present story of the bell's secrets and Hong Ryeong, the one chosen by the bell.

Daisuke Niwa is an ordinary, if slightly unlucky, middle school student. On his fourteenth birthday, he comes down with a \'condition\' that has plagued the men in his family for three hundred years. When he sees his crush, Risa, he transforms into his alter ego, the phantom thief Dark Mousy. Unfortunately, when Dark Mousy sees his crush, Risa\'s twin Riku, he transforms back into Daisuke. The only cure for this craziness is if Daisuke can get Risa to fall in love with him ...