Meet Sakai Hiroaki, a high school teenage mastermind with a genius-level intelligence and a lack of interest in anything that is easy to him.During one unlucky day, in an attempt to stop a student from committing suicide, he ends up committing suicide himself.After he awakens, he finds himself not in the real world, nor in heaven, but in purgatory, along with a group of others who did the same: commit suicide.Sakai discovers that he and his peers are subjected to never-ending intense death games in this world for reasons unknown to him, and he tries to find a way to escape.

What if an assassin who lost her memory while trying to assassinate the king suddenly collapsed and is then appointed as a concubine the next day? Yeon-wol, the only survivor of the Yeon clan, who were killed as traitors, becomes an assassin while hiding her identity in order to take revenge on the king. Yeon-wol infiltrates as a court lady and secretly seeks the king's neck, but falls into a trap set by the king and loses her mind due to the strong scent and collapses. The next day, Yeon-wol wakes up with no memories of the past, and unexpectedly receives the king's instruction and is enshrined as concubine Eunhyobi. King Hyeonu is furious at the actions of Akhee who brought Yeonwol, an assassin who came to kill him, as one of his concubines and runs to the concubine to kill her, but she loses control of her body... From LINE Webtoon: Wol Yeon of the great Yeon clan in the Kingdom of Asatae is a spirited girl who dreams of becoming a general one day. Her dreams are crushed when the royal government mercilessly eradicates her clan, murdering everyone, including Wol’s parents. Wol is left with no one she can trust but her tutor Jae-i, who proceeds to raise and train her as a master assassin so that she may take revenge against the king. Eight years later, Wol successfully infiltrates the palace to kill the king, only to find that all is not as it seems…

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).

I can only feel aroused around people that don't move.A psychopath who does not know love × A young boy in despair over life. A near-maddening love-hate relationship story...Raised by a single parent, Subaru was forced to work to pay rent while enduring abuse from his mother with a dependent personality disorder, and her lover. One day, Subaru's advanced wages are stolen by his mother's lover. To make matters worse, he overhears a conversation between his mother and her lover, who are both plotting to kill him to obtain his insurance money."I wonder why I'm alive..."He loses his will to live and wishes to die. When trying to act on his thoughts, a man he doesn't recognise, Kousei, approaches him and asks him to be his instead of committing suicide.To Subaru, who had been faced with despair, those words seemed to be like sweet temptation...

Zoas are monstrous beasts who disguise themselves and live amongst the humans. They were once feared for their physical talent and hideous form, but now, they are the hunted. Randa, a single-mother who concealed her identity as a Zoa, has now been caught in a mass murder case suspected to be the work of a sinister Zoa…    Unofficial English Translation (by the author)

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]

From Yaoi Is Life: Volume 1 : Inside a crowed train, a punk boy, You, is for some reason protected by a (dotekaku kakkou ii) B-boy. The B-boy, Makino, carries away with him a precious 'stone' that You had unknowingly dropped. He comes to ask You, who had ended up moving in Makino's home after much confusion, if he has any memory of himself. Has he met Makino is the past?! You was is shock, but...¦

[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.

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"Ding dong, welcome to the Infinite Archives game! Warm reminder: if archiving fails, you will face death penalties." Li Xingyun is unexpectedly drawn into an infinite world filled with various horrifying and terrifying instances, from the peculiar Fu Ling Street neighborhood office to the bizarre Nordic town, and the never-ending 666 train...

Eri Yukizaki is a girl who fights. She is a "pretty soldier." Her foe is the evil Chainsaw-man, who doesn't die even after being slashed. If he isn't defeated, the world will have no future. I was wrapped into this battle, and my life has changed completely... A "non-stop" negative youth story!

From Viz: In a world that has become 70% harsh desert, the Rainbow Council of the International Peace Keeping Forces, a team of super-powered global security guardians, have a growing crisis on their hands. No. 5, one of their own and known within the council as their top marksman, has left his post and gone rogue. It's up to the other guardians to track him down--but No. 5, with his mysterious companion Matroshka, won't go down without a fight.

In a high school classroom ruled by a "queen," a new student struggles to fit in with the other girls. The class has bullies, victims, and onlookers. Will she be able to survive?

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Byun Soo-ah, an impoverished novelist who only writes bad endings, is possessed by someone's curse as Choi Se-hwa, the villain of 'End of Youth', which is currently being serialized. Can Su-ah survive and return to her original world in a novel full of traitors, sociopaths, double personalities, and psychopaths?

The elementary schooler unlike any other, Kugi Kizutaka—who is searching for "useful pawns" in order to achieve his own ambitions—comes to learn of Mizukura Risuka, a magician with the title "The Red Witch of Time." Risuka had left the Kingdom of Magic through the Gate, chasing after her father, a great mage called both "a God" and "a Demon." An unpredictable and unchained magical tale!

Many creative liberties: “In a dark and obscure museum with an enigmatic collection, a group of teens, Millennials, work. Behind each piece is a chilling story of sorrow. A rubber ball retrieved from a haunted cave, a strange robot with the form of a butler, a salted pork rice from the window of a shop of murders.. What is the depth of darkness of the human condition. Come closer and I will tell you more.”

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From Hoshi Kuzuu: Chris, a beautiful young man whom he met at a bar and Yuu, who had a drunken marriage with him. And the matching tattoo on his ring finger was also meant as a joke... “We're married, so we've gotta stay together.” Persistent and possessive, he uncovers everything about Yuu's past. They happily drown in that drunken passion, but...!? A troubled tale of love that will move you to tears...has been drawn! • Kuroneko to Futari Kurashi (Black Cat and the Domestic Life)

Dr Kim works at the Korean equivalent of NASA. He has talent, brains and is unparalleled with his programming skills. One day, he hacks into the Mars Rover and catches the glimpse of an alien. Unfortunately, the device wasn't recording at the time and so he has no proof and clearly no one believes him. And as fate may have it, that alien has come to Earth believing she had been caught on video and wanting nothing more than delete that proof before her boss finds out. Misunderstandings ensue as the two characters meet and are forced to work together as a new group of aliens start stirring trouble on Earth.

From TVTRopes: (Game information) After the sudden death of her parents, a young woman named Shiori Kanzaki find a picture of a man that she believes to be her grandfather, and travels to Azaka VIllage, where he was apparently from, in hopes of meeting him. However, when she arrives she instead finds that the tiny village has a museum that she realizes she lived in as a young girl. There she meets Sakuma, a middle school girl who tends to get herself in trouble, and Suga, the strange manager of the museum who only communicates in written memos. Suga grudgingly allows her to stay at the museum for awhile and research her family. But there is a legend in the village of "Kotori Obake", a demon woman who abducts children who go into the nearby forest. How is this story connected to Shiori's past, and why does she hear voices calling her, commanding her to "Come fulfill the promise"?

The 1980's was an unusual decade. The price of land skyrocketed, and the value of money went well above the norm. The numbers that defined the world all spun out of control, launching one of the largest bubble economies Japan had ever seen. For Mahjong, as well, it was an age that saw high stakes games on a scale unlike any age before it. And in this age, a man some call "Kai" lives as a "Mukoubuchi", what true, lone-wolf gamblers are called.

…“She” is not the only one. A young girl, who suffered from a severe case of identity disorder, was abandoned by her parents and came to live together with her attending physician. Despite their peculiar relationship, the two were leading a quiet and comfortable life, until...

Even though J no Subete is three volumes long, each volume is a dynamic story in itself covering a particular stage of J's life. His life is a dark story and it's a very psychological manga. Book one is about all of J's trials and tribulations throughout childhood, during high school as he tries to find his place in the world and when he meets the somber honor student Paul... Timeline (from Oriolidae & Sparviero): 01 Barairo no Hoo no Koro v01 ch01-05 02 J no Subete v01 ch01-05 03 2 Shuukan no Adventure v01 ch05-06 04 J no Subete v02-03 05 Barairo no Hoo no Koro v01 Extra