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.

Senya is just an ordinary guy, who wanted to become an astronaut as a kid. One day and suddenly, he's transported into another world after seeing on the rooftop of his school something like a "tower" going across the sky. There, he witnesses a ruined world, where skyscrapers are connected by suspension bridges. Senya, perplexed, manages to see a girl standing on the roof of another building, as well as a masked man holding a bloody weapon in his hands...

Kurono Crawford (Chrono Crawford), a noble of Cepheus Empire had a secret. It was that he came from a Different world… Modern Japan. Having the knowledge about the modern weapons and his sense of values, he was an existence almost like a cheat, aiming to be the “Harem king”.

Abandoned by his superiors, left in command of the Empire’s rejects consisting of demi-humans such as Minotaurs, Dwarfs, and Elves, and thrust into a position as head of a poor fiefdom, Chrono will do everything he can to rebuild and strengthen his forces and revitalize the land, aided in part by his knowledge of the other world.

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.

Follow the fluffy travels of a female high schooler and a talking Shiba Inu across a post-apocalyptic world!

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.

The Yoshinomiya Municipal High School 2nd year students embarked on what they'd hoped was an educational trip with their friends and away from family but it was not meant to be... Their ship was hit by unexpected rough seas and crashed on a strange island! The surviving students are trying to understand what happened but soon they realize they are not alone on this island and the locals don't appear to be very friendly to strangers!!!

"Hellfire" – once sealed unquenchable fire, whose fierce flames can burn the entire world to the ground. Flare is an ordinary guy who lives in a border village and is sacrificed to an out-of-control fire. Experiencing inhuman torments in the hellfire, he would seem to have no chance of surviving…
But wait a minute! Is he not dying? Had he endured the fury of hellfire? Flare literally rose from the ashes and returned to the world of the living, gaining the ability to control the "Hellfire"! This is a fantasy story about the travels of a free hero who conquered the flame and cheated death itself!

WN: https://ncode.syosetu.com/n3806fv/

Alice Ryouhei, now a grown adult and married to Yuzuha, who is expected to give birth to their first child any day now, suddenly finds himself back in the Borderlands, the land between Life and Death, after getting into an accident. Will he be able to make it out of the Borderlands once more...?

A.D 70 The mightiest empire Rome started conquering the world. The whole Europe was havocked by Roman's foot. In Ablion, in order to protect their homeland, the Bravest Wyvern fought a bloody battle against the invader.
The term Bestiarii (闘獣士) refers to those that fought against beasts, whether through voluntary combat or execution, during the Ancient Roman era. Bestiarius refers to a single Bestiarii.

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.

A prequel series revealing Goblin Slayer's past and the events that led him to become an adventurer with the sole purpose of exterminating all goblins from the world.

Isamu doesn't stand out, and everyone calls him a "side character" behind his back. Even his passion for running doesn't get him anywhere on the track team, so he spends his nights languishing at a low-paying part-time job. It feels like everything he's holding in is going to boil over, but when people start getting infected with a mysterious illness that turns them into monsters when sexually aroused, he will have to learn how to control the urges he has pent up inside in order to survive.

A fantasy/drama story that follows a young girl as she participates in a survival game with the prize being a chance to rebuild her life to be better than the one she had. And the price of failure being her death.

[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!

A group of employees from the Fujitani Pharmaceutical Company are on a hiking trip. After the company suffered a crisis, the CEO hopes to improve teamwork and morale among new and old employees with this trip. Not everyone is as excited as he is. Unfortunately for them, they soon find themselves having to deal with problems that they weren't prepared for.

What's going to happen to these employees? Will they fall in love with hiking? Will they be able to work together, get along well, and bring the company back to its feet? Read and find out in this heartwarming story of adventure, friendship, and teamwork.

Four girls are stranded on a deserted island after surviving a plane crash. How can they survive?

What happens when several women with special circumstances compete for a rich handsome businessman's hand in marriage? Let the curtains rise on the “Courtship Battle Royale” show, where anything goes! Thus begins the beauty Gotou Yuuna's struggle to overturn her debt-straddled life!

Zuo Tianchen is the last living human in a mutated zombie-infested city. Just when he was sure he had died, he finds his soul returned to just before that ill-fated day ten years ago. He swears he'll protect the people important to him this time round and reunite with his past lover. Watch his struggles to survive equipped with his memory of the next ten years!

The story is set in the modern world, but there exist doors that can take people to the "other side," where strange urban legends and internet stories prove to be true. College student Sorawo Kamikoshi finds herself exploring one of these doors, and almost dies on the other side, when she is rescued by another girl named Toriko Nishina. Toriko is mysterious girl, but very skilled with a gun, and she seems to be searching for someone else on the other side. Together, both girls start to explore these doors to the other side.