In a summer vacation, a group of 15 children discovered a mysterious man living in a seashore cave, along with his high-tech gadgets. The man claimed to be a game developer creating a video game with a giant robot defending Earth from 15 alien invaders, and asked those childs to test the game for him. The kids agreed happily at first, but soon they began to find the game horrifying, not only because of its realism but also because the first fatality among them happened right after their first victory. Worse yet, they had no idea how to stop or leave the "game."
Original webcomic From MangaHelpers: Ichijo Kazuya thought that he was murdered, but when he came to, he was back in his high school days. He lived his entire life as a playboy and had had countless sexual encounters with women until that fateful day that he was killed. He realizes that his murderer was his old high school friend Tanaka Masaki who was jealous of Kazuya’s relationships and his built up anger eventually exploded. Taken back 15 years into his past, it seems that he has been given a second chance at life and given a chance to make different choices. He decides that the way to prevent his eventual demise is to make sure Masaki is more successful with girls and loses his virginity before Kazuya. But fate seems to be steering Kazuya towards the path of his previous life and keeps introducing the same girls he had sexual encounters with. [vyc]
Eun-Jo decides to commit group suicide, unable to cope with the burden when her daughter dies in an accident. However, she opens her eyes to the day before. She soon realizes that once midnight strikes, she is sent forty-eight hours backwards. How can she stop this? Eventually, she decides to continue reliving the past so that she can improve the life of her future self. But what happens when nothing she does has an impact on her future?
Viewed by some as a monstrous scourge and others as dark gods, the dragons are almost as ancient and powerful as Odin and the other Aesir, and for countless years have lived wild and free, unbowed and soaring across open skies. But things have changed. The dragons have been tricked and enslaved by the malevolent Loki and the traitorous Nidhogg, the Black Dragon. Now, their only hope for freedom rests with those few dragons who were able to avoid enslavement, one of whom was Iris. With ancient fire burning in her veins and hungry for vengeance, Iris has allied herself with the Einherjar so that she might gain the chance to burn Loki to ashes and free her captive brothers and sisters. Crystal Arena is a manga series based on the strategy game Crystal Arena, a story of the legendary Einherjar fighting alongside with the mighty gods in the ultimate battle of Ragnarok.
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.