Goblin Slayer Gaiden 2: Tsubanari no Daikatana is a spin-off series of the main Goblin Slayer! light novel. This is the manga adaptation of the light novel.
Set 10 years prior to the original series, the story centers around Sword Maiden's party of six adventurers on their journey to the Dungeon of the Dead to kill the Demon Lord.

“I don't want it to end…” Akira had made up his mind to confess his feelings to Himeno, the girl he liked, on the day they graduated elementary school. But what was waiting for him in the classroom was Himeno like he had never seen her before! Before they knew it, Akira and his classmates were trapped inside the school, unable to escape. Who was doing this, and why? Mysterious forces close in on the 11 fearful children, as if to laugh at them. This is the story of a harsh fate that awaits them. Does a hopeful future await them, or an ending filled with despair...?

This is a continuation of the story of Higanjima, featuring an isolated island surrounded by fish demons and a population of warring vampires and humans. Ryousuke, his girlfriend Kazumi, and his friend Yamaoka are shipwrecked by the fish demons and wash up on the shore of this cursed island. They soon encounter the inhuman cruelty of the vampires first hand, before Ryousuke is able to meet up with the human resistance. Ryousuke wants nothing more than to escape the island, but mainland Japan may not be safe for long. If the humans don't defeat the vampires soon, then the vampires will succeed in their plans to spread the virus to the mainland!

When Ivy was born into this world, she remembered her past life.
Remembering her preincarnation, she strove to avoid strife.
But fate curdled at the status check, when kids learn who they are.
For she had only one skill - Taming - and not a single star.

Ivy was weak from the start - at most, she could tame a slime.
Her parents hated her for it (apparently, being weak is a crime?)
Only one woman in her village would treat her as her own.
But after she "died", Ivy got the hint and ran from home.

She met a slime and named him Sora (she's a gamer?)
And such begins our story - of a small girl who's a tamer.
Yes, you may be scoffing at that tag called "isekai"
But you know the rules, and so do I.

You can't leave this island until you've killed 100 people. The most deadly survival game begins on a solitary island where desires swirl and only the strongest survive!

From DrCoke at MangaHelpers:
He has never been the type to stand out in the class. Kurihara Yuzuru has lived life by avoiding entering the lives of others, staying to himself. The story begins where he has to go to a whole new school, which means new classmates. He lacks any confidence to make new friends, so the fear of rejection drives him into a wish he never thought he would make. This single wish leads to a first day of class he would never forget. Yuzuru will have to make choices that will significantly alter others' lives, choices he could never make in the past.

Alicia is an orphan living in Ciel, a world of swords and magic. One day, she discovers that she is "the heroine of an otome game." Even the death of her parents was simply part of the story.

Alicia decisively rejects the heroine's role as "nonsense." Taking the name "Aria" as an adventurer, she gradually grows into the "Ash-crowned Princess of Slaughter" who wields multiple weapons and magic!

But, when she receives a request to escort a "villainess," without realizing it she finds herself caught up in the stage of the game where nobles struggle against each other...?

"I am 'me.' I'm not a character in a game!"

The story follows Hikari Shirochi, an ordinary high-school boy whose hobbies are games and PC-modding. In the first chapter, mysterious phenomena occur to his body, which conducts static electricity unusually well.

In the 17th century, the Holy Roman Empire was ravaged by the Thirty Years' War. In the middle of this chaos appeared a japanese mercenary named Isaak. His fierce battle begins.

The brave tale of the peerless Great Emperor Leonard the First was evaluated as a universal truth.
However, in his younger days, before he managed to unify the continent, he was a boorish and clumsy young man, he got his homeland taken away from him and was branded with the infamous name of “Nosferatu”. This is the story of a great counterattack, a great revolt.

Leonard vowed to recover his homeland and truly became a mighty warrior. Several great generals, sages, talented women and geniuses comparable to gods and demons got attracted to the single-minded Leonard and congregated around him. Eventually, they became a great force able to engulf their depraved fatherland and contended against rival countries.

The story centres on the oddities that appear in the distortions within everyday life.

What destiny awaits them after the screaming?

After abruptly departing from a train in a small town, a couple encounters a “weeping woman”—a professional mourner—sobbing inconsolably at a funeral. Mako changes afterward—she can’t stop crying! In another tale, having decided to die together, a couple enters Aokigahara, the infamous suicide forest. What is the shocking otherworldly torrent that they discover there?

One of horror’s greatest talents, Junji Ito beckons readers to join him in an experience of ultimate terror with four transcendently terrifying tales.

Every 100 years, 100 demon children are sent to Earth to compete in a battle to become king of the Demon World. Each demon is paired with a human partner who is given a spell book of a specific color. The human can cast the demon's spells through their book. If a demon's book is burned, they disappear and return to the Demon World. The last demon remaining becomes the king. The show is oriented around Gash Bell and his human partner, Takamine Kiyomaro.

Won the 48th Shogakukan Manga Award in the Shounen category.

The battle action manga tells the story of how humanity is threatened by monsters with overwhelming might called "Kijū." As the cities are destroyed and the people fall into despair, a rooster stands up to face against the threat. It is the story of how a single rooster saves humanity.

Based on a popular game from Niconico.
Sara Chidouin returns home from school late one night to discover that something's gone terribly wrong.
When she comes to, she finds herself, her friend Joe, and 9 other people trapped in a mysterious place.
Placed in life-and-death situations, they must come to an agreement about what they should do - and who should die.

The middle-aged man and airsoft enthusiast Daisuke Koga is summoned to a different world on his 40th birthday. Given the ability to turn airsoft guns into real guns, Daisuke must save the other world while traveling back and forth between reality and the fantasy world. Alongside female swordsman Rena, Daisuke becomes the only gun user and dominates in the fantasy world after work!

An unknown parcel arrives to Yoshio, a 30-year old NEET. The content is a game disk titled “The Village of Fate.”, a beautiful CG game with real-life images.

All of the villagers in the game are high-performing AIs, who behave remarkably close to human beings. In the game Yoshio takes the role as the god of destiny and is in a position to guide the villagers. But his only options in the game are to give a message, a prophecy, once every day. The villagers will follow the instruction, and their gratitude transforms to the power of miracles, which the god of destiny can use.

Yoshio is worshiped as God but in reality he lives like a shut-in. Thanks to villagers he will again learn the joy of life and thanks to him the villagers will be saved.

A catastrophic event has thrust the world into an age where disease begets disease. Ostracized for his unconventional treatment methods, the dark Doctor Ikuru is stricken with an immortalizing disease. On a desperate mission to die, he must save a world desperate to live. This medical science-fiction adventure will go to the very edge of humanity and back in one man's search for an ending to his suffering, all while saving the world he wishes to leave.

(Source: MANGA Plus)

Note: The manga got originally published as a short series of 4 chapters on February, 2020 in Shounen Jump +. On September 6, 2022, the manga got serialized and its 4 original chapters got republished as part of the serialization.

Ikuto Touhohin just had a last fight with his old man, one that led him to make a rash decision to run away from home. He boards a ship, deciding to take a vacation, but the ship is suddenly hit by a huge storm--one that sends Ikuto overboard! When he regains consciousness, he realizes he is still alive… on some island. An isolated island. An isolated island with nothing but girls and talking animals. Stranded on an island with only girls, no electricity, gas, radio, television… like he was back in the stone age.

Cute girls doing risky forex trading.

An unknowing Sudou Kaname is invited to try out a new mysterious mobile app game called "Darwin's Game", but later realizes that he's in for more than he's bargained for when he finds out that there's no way to "quit" the game.