Based on the widely popular light novel World Of Immortals.I am using the light novel's description below...
The World of Immortals, it is the world every mortals long for. For many, it is an eternal glory to cause a spatial distortion and enter the World of Immortals. But the vicissitude of time is simply merciless, the legends regarding immortality had long been forgotten.

However, a miracle shall rise once more! An immortal was about to split the space with martial arts and cut all ties with the mortal world. The protagonist, Xiao Chen, was caught up in it and accidentally brought to the World of Immortals. What will they find in the vast world beyond the rift?

Continues where Tantei Gakuen Q ended two years later. They are still in Dan Detective School solving cases.

Strangers ally with each other to survive a Battle Royale style game of death on a deserted island against other contenders. A lot of contestants have amnesia and each person has a life sustaining bracelet which heals wounds over time.

Beautiful appearance, beautiful food, beautiful legs, beautiful voice, beautiful skills...
Which beautiful boy is your type...?!

The trouble that arises at Private Yubiwa Academy is rumored to be resolved informally, secretively and for free, by the mysterious "Pretty Boy Detectives."
In order to search for "a star she saw 10 years ago", second year Mayumi Doujima opens the door of mystery to the 5 beautiful boys!

Boredom in middle of nowhere can never be a good thing. And the girls featured in this one-shot prove just that.

A student council president asks a newly appointed priest to help her out with strange events that has been happening around her school. But what it looks like is not what it appears to be.

The story is about a young pilot named Shin Kazama and his experiences at Area 88, a mercenary air force base secluded in the desert of a war torn country. Shin goes from head of his class at a world renowned aviation school dating the beautiful daughter of an airline president to a mercenary fighter pilot bound to Area 88 by a three-year contract that he was duped into signing by a jealous and competitive childhood friend. Determined to earn $1.5 million dollars to buy his way out of the obligation and return home, killing becomes second nature to Shin as he quickly rises to the top rank at Area 88. Overwrought with shame and self-loathing for what he has become, Shin begins to question whether he is still fighting for survival, or like his fellow mercenaries, for the sheer excitement and camaraderie of battle.

Note: Won the Shogakukan Manga Award for shōnen in 1985.

A journalist discovers a mysterious video when she becomes interested in the deaths of some local teenagers who attended the same high school. Only after watching the video does she realize that it is the missing link in the deaths of the teens. With just one week to live, she must solve the riddle of the accursed video if she wishes to save herself.

Strange events during a festival night.

Yasoinaba’s very own Investigation Team are back in action in a new adventure based on the critically acclaimed Persona Q series! While enjoying Yasogami High’s cultural festival, the Team suddenly hears the ringing of a mysterious bell and a bizarre, new exhibit appears at the festival. Inside this exhibit is a most curious maze—one that will take them on a wondrous and treacherous journey. And as they explore this labyrinth, they’ll meet new foes and maybe even some new allies from the Persona universe…

This series is a retelling of the SAO Aincrad Arc starting from a day or two before the clearing of the First Floor Boss, and continuing onwards. The first chapter was included in the Anime as Episode 2. Note: Please be advised that the side stories in this series have some changes from the original Light Novel versions of the Sword Art Online main story.

Opus is Kon's metafictional tale of Chikara Nagai, a creator under pressure to finish his latest graphic novel, Resonance, who finds that the harshest critic of the shock ending he's got planned is the character who'll have to die in it! Nagai's strengths and weaknesses as a creator are tested beyond their limits as his present and his past, and the worlds of the manga and of reality, become the levels of a maze he may never escape... let alone get a chance to resolve the story!

From Viz:

Out of nowhere, a Japanese elementary school is transported out of the world they know, and into a nightmarish wasteland. Have they gone to another planet, or is this toxic world actually a vision of Earth's future? Soon, the students and teachers must struggle to survive in impossible conditions, besieged by terrifying creatures and beset by madness. Part Lord of the Flies, part post-apocalyptic science fiction, The Drifting Classroom (1972-1974) is a classic can't-put-down manga series. It was adapted into a Japanese live-action movie (1987).

It was awarded the 20th Shogakukan Manga Award in 1975.

April 2014, Japan. It all starts with the High Energy Accelerator Research Organization that’s looking into the yet-unknown Exotic Star particle. A great war begins between two factions: the Enlightened, and the Resistance!

One day while walking home from her job, Kurumi Akino finds a wounded young man, and saves his life. He mysteriously disappears after that, and leaves only the name “Hakuron”. Next thing she knows she’s been kidnapped from her school, and is on a private jet with that man, heading to China. It turns out she saved the life of the most infamous mobster in Hong Kong, and he wants her to stay with him.

Stand Alone Complex takes place in the year 2030, in the fictional Japanese city of New Port. The story follows the members of Public Security Section 9, a special-operations task-force made up of former military officers and police detectives. The manga presents individual cases that Section 9 investigates, along with an ongoing, more serious investigation into the serial killer and hacker known only as “The Laughing Man.”

Alexia Tarabotti is laboring under a great many social tribulations. First, she has no soul. Second, she’s a spinster whose father is both Italian and dead. Third, she was rudely attacked by a vampire, a terrible breach of social etiquette. Where to go from there? From bad to worse apparently, for the appalling Lord Maccon (loud, messy, gorgeous, and werewolf) is sent by Queen Victoria to investigate the incident, and he is none too happy to see Alexia at the scene. With unexpected vampires appearing and expected vampires disappearing, everyone seems to believe Alexia responsible, given her soulless ability to negate supernatural powers. Can Alexia uncover what is happening before she becomes the next victim?

A bloodstained man stands in front of a terrified girl. He proclaims his love for her and makes this ominous declaration: A year from now, she will either die alone or will be with him forever. Now, rumors abound about the cursed girl that causes any boy who proclaims his love for her to die. Join us to discover the mysteries of Metronome.

A, B, AB, O...

These are the common blood types with which most people are familiar, but there are rarer strains in the world, "hidden blood types." Individuals possessing these are called "strangebloods," and they are imbues with incredible abilities by the very blood flowing through their veins.

But what happens when all of these disparate blood types come together? The result is rumored to be the legendary "Blood of Wisdom" which bestows god-like power. Little surprise, then, that more than a few unsavory characters are actively pursuing this awesome power. Can Chiaki Kaminaga and his friend Kaguya Daidouji survive this blood hunt...?

Keyman is the resident hero of Lockville City, a place inhabited by both humans and animal people. In the years since his debut as a hero, crime has decreased significantly, which does not look all that great for the local police force. But one day, after he catches yet another group of criminals, Keyman is mysteriously murdered. Detective Alex and his police force are investigating the murder, and one of their major clues is the words "Dr. Necro," which were carved onto Keyman's body after his death. Their case gets even stranger when Alex unexpectedly meets "Dr. Necro," who appears to be a young girl, in a bar. What monster could be behind the murder of Keyman, and what does the childlike Dr. Necro have to do with it all?