Tsurumi Asuta is a 17-year-old second year high school student. He was an apprentice cook working at the public diner "Tsurumi-ya" that was managed by his father. One day, Tsurumi-ya is hit by fire and Asuta dived inside the burning shop in order to save his father's santoku knife which is said to be his father soul, where he found demise.

When he came to, he was in the midst of a strange jungle. He was then attacked by a beast resembling a boar, but Asuta was saved by a girl named Ai Fa claiming herself as part of the "People of Morihen." It was then that he realized he was in another world.

From Kirei Cake: 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. 

Dias fulfilled his parents' will to help others, and kept fighting on the battlefield to that end. Now known as the “Savior Hero” from his long wartime career, he was rewarded with a vast territory from the king. After having met the horned Kijin girl Aruna who lives there, he begins his new slow life as a lord.

One day, an ordinary high school student is transferred to another world. He raises his level in the other world, successfully defeats the Demon King, and saves the world! With his strongest status, he decided to return to his own world; however, in the world to which he returns, a new "dungeon" has appeared.

Lock n' load with the baddest soldiers of fortune ever to hit the high seas of Southeast Asia! Aboard their World War II era torpedo boat, the Black Lagoon, Dutch the Boss, Benny the Mechanic, Revy Two Hand, and Rock, the salaryman from Japan, deliver anything, anywhere. In the dangerous underworld of the Russian Mafia, Chinese Triads, Colombian drug cartels, crazed assassins, and ruthless mercenaries, it's hard to know whom to trust. But if you've got a delivery to make, and you don't mind a little property damage along the way, you can count on the crew of the Black Lagoon.

High school student Boji Nichiro is isolated from the rest of the world due to fierce bullying. One day, however, the world is transformed by the "dungeonisation" phenomenon! In the midst of the chaos, Nichiro awakens the unique skill "Shop". It was an out-of-the-box skill that allowed him to buy everything from food and daily necessities to unrealistic items! The start of a painful and "wacky" modern fantasy from "Shosetsu-kaerou"!

The Calamity War that engulfed all of Earth, and the Gundams deployed then which were said to have brought it to an end. 300 years later, some have been hidden, some abandoned.

Argie Mirage, a boy who carries the past of his family's death at the hands of a Gundam, meets Volco Warren, a boy who wishes to rebuild the Gundam his family left behind.

To destroy a Gundam. To rebuild a Gundam. In the midst of the two boys' intersecting fates, the Astaroth will awaken from its 300 year slumber.

Side story set in the Mobile Suit Gundam - Iron Blooded Orphans universe.

The manga tells a fictional version of the story of historical Tang China diplomat Wang Xuance, centering on his diplomatic journey from Tang Dynasty China to the Empire of Harsha in India in the 7th century CE. When he comes upon a crumbling empire that is now hostile to him he escapes to Tibet and raises a confederation of Tang, Nepalese, and Tibetan soldiers to mount a raid on the Empire of Harsha.

In 1912, a young woman tracks down the elderly Nagakura Shinpachi, determined to hear the true story of the Demon of the Shinsengumi, the Vice Commander Hijikata Toshizou. Hijikata's story begins in 1859, when he is a violent young man honing his sword skills while peddling his family's medicine. Soon, in his quest to find stronger people to fight, Hijikata starts to come into contact with others who will eventually be his comrades in the Shinsengumi. The first one to make an impression on the brash young man is Kondo Isami, who proves to be a better fighter than Hijikata...

"How did you know? I hid it well so that no one would find out."

Adrian Caesar von de Paltzgraf, the successor to the Paltzgraf Family. He is hailed as an angel in this world, but only I knew that the serial murders and murder attempts happening in the area which everyone was talking about were all committed by a young, good-looking gentleman.

[Adrian's murderous intent has increased.]
[Convince Adrian to lower his murderous intent. If not, you die.]
[Adrian's murderous intent is at 92%.]

I am the only one who knows. I was the only one who transmigrated into the world of this ridiculous horror game.

---

Note:
- Only Ridibooks has all the volumes, due to Volume 1 of the side stories being R19.
- "No Exit Horror" is the English name on the ebook and physical Korean novel cover.

On Christmas Eve night, Meiko, a female college student, planned to spend a peaceful evening alone on the island. However, when she woke up, a corpse was lying in front of her. From that moment, she was faced with a series of grueling trials unlike anything she had ever experienced before. To reunite with her parents, whom she parted with in an unfortunate way, she must survive—even in this twisted world.

[The Dungeon is resetting.]
Once a Dungeon has been explored and its traps are activated, it resets itself for the next ‘users’. But those resets don’t apply to me?! The only existence that has become free in the endlessly resetting dungeon. Armed with absolute grinding, Jeong Dawoon ‘the Bug’ begins his dungeon exploration!

From ANN:

Guts, known as the Black Swordsman, seeks sanctuary from the demonic forces attracted to him and his woman because of a demonic mark on their necks, and also vengeance against the man who branded him as an unholy sacrifice. Aided only by his titanic strength gained from a harsh childhood lived with mercenaries, a gigantic sword, and an iron prosthetic left hand, Guts must struggle against his bleak destiny, all the while fighting with a rage that might strip him of his humanity.

Warning: This manga is for mature audiences only, since it has sexual content and graphic violence (gore, blood, rape, etc). Definitely not for the weak hearted.

The 1988 Prototype chapter won a prize at the Comi Manga School Miura attended and the main series won the Tezuka Osamu Award for Excellence in 2002.

Story centers on a boy named Tokio, who lives alongside other children inside a beautiful wall. One day, Tokio receives a message that says "Do you want to go outside of the outside?" In a heaven that has begun to tear itself apart, a group of boys and girls begin their adventure.

A manga about combat maids engaging in trench warfare

August 1893, church calendar. The kingdom of Nohmaland declared war on the Flatanian empire and invaded their territory under the pretext of atrocities against Patlasi within the empire In order to support the regular troops, the empire send the [armed service], and armed maid group tasked with guarding/policing the castle inside, to the front lines. The war against the kingdom still continues.

Challenge it. As many times as it takes until your spirit breaks. In order to rekindle the life that has been extinguished, in the harsh and merciless mountains of the underworld — A staggering dark survival epic depicted with overwhelming artistic skill.

A future where the cold war between the USA and Russia never ended. Setting Moscow as the stage, "Liquidator" Daniel Kuragin runs through alleyways with a submachine gun in hand! by "Goblin Slayer" creator Kumo Kagyu, the overwhelmingly popular web series has begun publication!

Yeon-woo had a twin brother who disappeared five years ago. One day, a pocket watch left by his brother returned to his possession. Inside, he found a hidden diary in which was recorded “By the time you hear this, I guess I will be already dead….”

Airi Hirakawa, a model in a popular woman magazine, is suddenly hit by someone in front of her house and wakes up in a room full of garbage. Airi is confused when she is suddenly proposed by Hirokazu Imai, the man who is her kidnapper and stalker.

And this is how her life of confinement begins, where suffers sexual violence and where even toilet breaks and meals are managed.

*WARNING*
Contains abuse, kidnapping, rape, moral degradation, sadism etc.

"It isn't the strongest who survives. The one who survives is the strongest."

After being discharged from the military, Jin Seowoon did nothing but play games like a loser. One day, he was invited to the world of "Cloyd Survival," which resembled a game he enjoyed.

In that world were masters of martial arts, kings from other worlds, and notorious killers...

It was a gathering of monsters that surpassed human imagination.

Jin Seowoon had just one objective — to survive and become one of the top ten.