From MangaHelpers: Hatou Gaku has a very odd friend at school named Marii Yukari. Yukari has purple eyes and a bizarre way of looking at the world: she sees all living things as robots. This has not always worked out well for Yukari, even costing her a best friend when she was younger. However, Yukari insists that the things she says she sees is true, and her vision seems to give her insight into the abilities of others. Gaku thinks she's just weird, but she soon realizes that Yukari has unexpected talents. It seems she can fix anything, and even the police come to hear her insights. It turns out that Yukari's purple eyes are not unique in the world! However, there is one important distinction among those who see humans as other objects. Do humans appear as unimportant as objects, or do those objects appear as important as human beings? [tethysdust]
In 1998, Battler Ushiromiya's younger sister Ange has lived a miserable life being raised by her Aunt Eva, the only survivor of the murders on Rokkenjima. Bullied and unhappy, Ange finds solace in the diary of her cousin Maria and the world of magic until she rejects its existence. However, with Eva's death and the inheritance of Beatrice's titles, Ange receives an offer from the witch Bernkastel on how to bring back her lost family. Meanwhile, in 1986, Battler Ushiromiya and the Golden Witch Beatrice continue their game, with Battler aided by Ange, hailing from twelve years in the future, in hopes of saving their family at last.
From MangaUpdates: There is a mysterious group of people who inflict cruel and fatal games on people for their own amusement. Tatsuya and Misa are out on a date in an amusement park when they wander into one of these horrific competitions on the tallest roller coaster on earth. The seats fall out of their 12-person roller coaster car, and they are told that the game will end when all but one person has fallen to their death. Will the passengers be able to find a way to escape the competition? Will there be any retribution against the orchestrators of this sick crime?
A four chapter crossover between Mahou Shoujo Of The End, Hakaijuu and Versus Earth.
From Wikipedia: Set in the modern age, the story is about Miharu Rokujou, who just wanted to live a normal life and inherit an Okonomiyaki restaurant. At the moment, his biggest problem was the constant pestering from Kouichi Aizawa and Durandal Thobari Kumohira, who started a Nindō (忍道?, lit. "Way of the Ninja") Club. Miharu wanted nothing to do with "ninjas" and turns them down every time. But soon, he is attacked by an actual group of ninjas and is protected by Kouichi and Kumohira. There, Miharu learns of the hidden ninja world Nabari, the roles of his classmate and teacher in that world, and of the secret art Shinra Banshou (森羅万象 Shinrabanshō?, lit. "all things in nature") within him. The secret art, containing all the world's knowledge, is sorely coveted in Nabari. And because of that, Miharu cannot return to his normal life. He must become the "Ruler of Nabari" to survive. From Baka-Updates: Rokujou Miharu was a seemly reluctant junior high student living in his own world. However, within him, lurked the ultimate power of Nabari, “Omnipotent”. To possess such supreme weapon, the Wolf Pack of Iga swore to bring Miharu back to Iga village. On the other hand, Miharu’s English teacher, Kumohira sensei, and classmate, Kouichi, were the Banten ninjas whose mission was to protect Miharu. A war waged over the ownership of “Omnipotent” thus started. To survive, Miharu must enter the hidden world Nabari, to become the king.
Nareh and Tareh are fraternal twins, Nareh the elder sister and Tareh the younger brother. When Nareh learns that Tareh has been accepted into the all-boys Ordinary School, she is shocked, and prepared to stop him at all costs...
From VIZ: In 2015, the "Angels" have returned, and Shinji Ikari, a fourteen year-old child of the new Earth, is forced by his father -- Gendo, commander of the secret organization NERV -- to pilot the monstrous biomechanical weapon called "Evangelion" to match the Angels' fearsome power...
[From SnowKiss]: Aiko should be dead, but when she awakes in a secret hospital, she has no recollection of what happened that night until a monster showed up and her memories flood back. Her arm changed into a powerful weapon similar to the monster, a chimera arm. The secret organization Atheos asked her to help them fight off the chimeras. An accident happened that led Aiko to understand how much she wants to live, and decided to join Atheos, in order to find her place.
The son of a genius magician, Yoichi Takato has been something of a polymath ever since his high school days. However, his high school days are marked by boredom and an inability to open his heart to others. When he happens to join the magic club, he meets with friends to whom he can finally open his heart. But then, the curtain rises on a terrifying murder show! A spinoff story with Hajime Kindaichi’s nemesis from “Kindaichi Case Files”, “the hellish puppet master” Yoichi Takato must solve this murder case, even though he is still in high school!!
Ryuugamine Mikado is a boy who seeks for the exciting life of the big city--who yearns for an unmundane life; a hoodlum, a stalker denpa-girl, an informant, a champion fighter, a black-market doctor, and the Headless Rider astride a black motorcycle. But despite how different they are, all of these stories are interconnected by mysterious incidents going on in Ikebukuro: mysterious kidnappings, a pharmaceutical group supposedly performing human experiments, and the mysterious "colorless" gang known as the "Dollars." From then on, the existence of supernatural cases and a gang called the Yellow Turbans will rise to the surface, and Ikebukuro will pushed to the breaking point. + Heroman manga + Barbara manga
There is a special organization known as "anonymous" which takes children and raises them without names, without feelings, without souls. Then it sends them out to kill. Can emotions get through to these cold-hearted killers? A sequence of stories that deal with a few of the organization's members.
From Shinmakoku Scanlations : Shingakkou - Noli me Tangere - tells a story of Michael Levi. His father, mother and younger sister were murdered by people who seem to be members of a satanic cult. Michael and his twin brother Gabriel (or Gabby) were students in a Seminary. They heard rumors that the cult members were in the same school, so they returned back there and with the help of their fellow students and friends tried to uncover the mystery surrounding their family's deaths. But some things were better left in the dark.