Everyday is a normal day in the small town where Kasuga Arata lives. However, everything changed on the day of the Black Sun, and following it, a magician appears before him. The Black Sun caused the Breakdown Phenomenon which destroyed the town where he lives. Because of this, his normal life was artificially reconstructed by a Grimoire that his childhood friend had left. Just what is the purpose of the magician coming to the town? What will he do with the Grimoire's keepsake?

From MangaHelpers:
The story begins in 1420, right as what would be known as the Bohemian War began. A young girl named Sharka is raped and left for dead among the corpses of her whole town, but she manages to survive. She is picked up by the Bohemian forces, who put a gun in her hands and take her on board as a soldier. Will Sharka be able to fight and take her vengeance?

He is a successful writer who has created a fantasy world in his novel. But he made a terrible mistake in the end, causing the protagonist to reveal himself as a traitor and the world to be dominated by the demon king. He received the wrath of readers and regretted his choice.

Then he woke up in his own novel, in the body of the villain Shin Kang Ho, a ruthless killer who works for the demon king. He is five years before the disastrous ending, and has the chance to change the fate of the world. But Kang Ho has no intention of being a hero. He knows the world is cruel and full of greed. So he decide to use his talent and knowledge to achieve everything you can, without caring about others.

Kang Ho will devour all the resources, rewards, skills and treasures he finds on his way. He will become the strongest and richest of all.

When a stray black cat named Kuro crosses Mahiru Shirota’s path, the high school freshman’s life will never be the same again. Kuro is, in fact, no ordinary feline, but a servamp: a servant vampire. While Mahiru’s personal philosophy is one of non-intervention, he soon becomes embroiled in an ancient, altogether surreal conflict between vampires and humans.

Have you ever noticed that someone you knew is no longer themselves? The subtle changes they show that indicate that they are no longer…human? Join hunter Ha-Te and the part-timer hunter Ji-Hyun on their adventure of hunting trolls to save the humanity!

Mai Shintani, who works at the Kitakabane Police Station was suddenly assigned in the "Organized Crime
Countermeasures Division", commonly known as the "Sotai". Immediately after that, she gained influence within
her jurisdiction. The leader of expanding yakuza faction "Tatsygamigumi" Shogo Mikuro mysteriously disappeared.
There's a tension in the conflict between cases of opposing Yakuza groups. And for some reason, Shintani is looking
composed at the northern police station. Behind it is an absurd shocking truth?!

Kai, who comes from a family that specialized in dark-style occupations, sought even greater strength.

One day, he saved the fourth royal princess who was under attack by monsters. This was the the trigger for him managing to join an academy that specializes in training people for holy occupations.

He endures training so incompatible with his physical constitution that it could make him faint, all to become the polar opposite of the strongest dark knight—the Kingdom's strongest holy royal knight, The Royal Paladin.

An occupation-change drama of a genuine dark knight begins!!

"Now let us enjoy our deathmatch—to our hearts' content"

A spin-off of the series Murciélago featuring the character Reiko Kuchiba.

It's about the coastal lifeguard, as Hyogo Kanbayashi tried to make his way through to enter Tokkyuu, the elite lifeguard team.

"...It's fine if I want to live."

Flamme was chosen to join the hero's party even though all her stats were zero. The only thing she had was an ability with no known effects, "Inversion." It was completely worthless in combat, but even still, she wasn't discouraged and did whatever she could for the party. However, the famous genius sage Jean was unsympathetic and did whatever he could to drive her out, finally resorting to selling her into slavery.

Even at the slave shop, Flamme was persecuted endlessly, finally being fed to horrific monsters just to serve as entertainment. However, when she picked up the "Cursed Greatsword" that was supposed to melt her body away, her life was quickly 'inverted.'

The curse turned into a blessing, and her despair became inverted—this was the start of a dark fantasy interwoven between two young girls!

After killing the Demon Lord, Blum Dilmond was pursued by the kingdom and forced to leave the country. While spending days trying to avoid the assassins aiming at his neck, he suddenly came up with an idea. He could hide inside the dungeon that was once the Demon Lord’s hideout. If it’s there, then he could be safe.

Without hesitating Blum went into the dungeon, but then he met someone unexpected in the lower levels, one of his former companions with whom he fought side by side against the Demon Lord. Moreover, a maid, called Irene, who once served the Demon Lord is also there. And so since their interests happened to match, the three of them decided to cooperate together to rebuild the worn-out dungeon, working earnestly in order to turn it into their own safe paradise.
Links:
Author's Twitter
Japanese Light Novel ( on Amazon.co.jp )

Several decades have passed since the Hero defeated the Demon King and brought peace to the world, and the Hero has grown old enough to only vaguely remember his magic spells. When the remnants of the Demon King's army attack the Hero, he decides to set out on a journey again. This time, it's not a journey to save the world, but a "death preparation journey" to look back on his life.

In a world where peoples' names grant them superhuman powers... Two agents from the Nordic Naming Bureau (NNB), an agency specialized in investigating crimes committed by "Namers", handle the case of a man and his missing wife and son. Things take a turn, however, when the duo come face to face with the man, who wishes to give his son the same name as himself...

The year is 2016 a.d. Some time ago, humanity had escaped the path to peril. This tale takes place after that period. This is the tale of a hero once again.

Hotta Youta is killed while returning home from work on a cold evening. He wakes up being carried by a bunny-eared woman! Featuring Reincarnation, Guns and Harem, its a Gun vs Magic Story that gives Hotta Youta a new life... and an edge!

Kim SooHyun is an ordinary high schooler who isn’t good at studying, fighting, or being attractive. Suddenly, he’s faced with a quest window right in front of his eyes. After being given the powers of a game [system] out of nowhere, how will our hero confront the challenges ahead of him?

Valt Aoi is a cheerful boy in the 5th Grade. Crazy about Beyblade, he works hard to better himself at Beyblade with the partner Bey, Valtryek.

Valt's close friend Shu Kurenai, who is regarded as a Beyblade genius, is a participant in the National Tournament and is called one of the "Four Kings" due to his high influence within the tournament. Valt, who is inspired by Shu, sets his aim towards the National Tournament!

From Intercross:

Kurosaki Mafuyu was a juvenile delinquent and head of her gang before her subsequent arrest got her expelled from high school. Now that she’s transferred to a new high school, she’s determined to become an “ultra-shiny, super feminine high-school student.” But with a new friend like Hayasaka-kun and a homeroom teacher like Saeki Takaomi (who may be more than he seems), will Mafuyu really be able to live a girly-girl high-school life!?

Ranga was an ogre. However, he was also a strong ogre. Strong enough that he became one of the four most elite demons in the whole land. And, as with many other stories, his comrades betray him. Upon his death, he reincarnates as a normal human. Now, with all of the knowledge and strength of his former life, what do you think he’ll do with this new opportunity?

a) Live a peaceful life
b) Live a slow life
c) Do whatever he wants

Webnovel Link: https://ncode.syosetu.com/n9030ey/

To repair the singularity of the future, the main character, Ryuka Fujimaru, will shift again to lay down a tremendous battle. Kengoro Nishide of "Umehara FIGHTING GAMERS!" Breathes new life into "FGO".