From MangaHelpers: In the future, humanity is on the decline. Due to decreasing birth rates, the population has been quietly decreasing, and society has begun to regress in many ways. However, all is not lost because there is a new kind of people who are inheriting the earth-- small humanoids known as 'fairies.' This story features the young woman who becomes an official human-fairy mediator. Living with her grandfather, she plans to build a solid relationship with the fairy population. She runs into problems right away, as she suddenly realizes how difficult it is to even greet the local fairies. They see her as huge, terrifying, and godly, and it will take plenty of tasty incentives to convince them that she really does want to be their friend. Her exciting days with her fairy constituency have only just begun! [tethysdust]

Paw pads wrapped in white fur. Fluffiness around the neck. A bushy tail. A rounded figure that was the very definition of fur ball! ――A certain Japanese girl had been reincarnated into such a fox cub; Milfiria.
Milfiria was told to watch the house by her mother, as the mother left for the capital. However, unable to bear with the loneliness and deciding to chase her mother to the capital, Milfiria became lost in a fort protected by strong knights.

Bat has returned to her birthplace, Rainbowria, where her mother grew up. The 17-year-old Bat, as the princess of the Black Knight Queen, has roused the sealed Starship from its sleep. The story follows Bat's adventures in the mysterious Starship.

Dungeon Sherpa: a specialized support class that helps carry luggage and guides adventurers to explore and conquer a dungeon. Follow Rou, a young but skilled sherpa who operates in the Tyros Dungeon. Having lost his father half a year ago, Rou works to support his younger sister whom he cares for. One day, he is hired to to take on the job of assisting the hero Yuika, the Black Princess, who has previously made a name for herself at the royal capital with her party, Twilight’s Sword.

The battle between the Demon King and the Hero will decide the fate of the world.

Verna, the son of a nobleman, who remembered that he was reincarnated in the world of an RPG game, he was originally a mob who died without a name. The reason is probably the attack on the royal capital by the Demon King's army. Judging that, Verna mobilizes all the knowledge and wisdom of his previous life to find a way to survive in order to avoid a tragedy.Train yourself with the knowledge of the game and become friends with the Hero Mazel. The game start event "Monster Runaway Stampede".

On the battlefield where the Hero is absent, Werner shows a lion-like performance by thwarting the aim of monsters that no one has noticed, and will change the history of the game!?

The full-fledged war fantasy of mob characters who struggle behind the legend begins here.

[This is a story where the hero kills the princess.]

In a world where the dead devour the living, it is a great honor to become an "Undertaker", beings whose mission is to grant peace to the dead and return their souls to heaven. Advancing to the final stages of the exam, an apprentice, Leon, encounters a panicked girl while on a train to the capital...?!

From MangaHelpers:

In the world, especially during ancient times, gods existed and, even now, find their place in the world. But at times, there are mortals who, whether intentionally or not, kill one of these gods and receive the “curse” of the name “Campione” or God Slayer. Those under this curse gain the power of the god they slayed and receive the mission to obliterate any false god who attempt to take control of any local turf.

Godou Kusanagi is one such unlucky human who accidentally killed the Persian deity of victory, Verethragna, and received the powers of the god’s ten forms: Bull, Ram, Camel, White Stallion, Goat, Boar, Raptor, The Wind, The Youth, and The Warrior. But this power draws in all manner of trouble, which is inevitable since the role of a god is ultimately difficult for a human. Yet, one such “trouble” is that this enhanced status has currently attracted three ladies of powerful magic and religious backgrounds, who all wish to aid him in battle. But are they really there to aid him, or do they just wish to find love with him? And what business does the leader of the three, the magic sword-mistress Erica Brandelli, have with these heavily unorthodox activities? [Midori-Mori]

“Hey, hurry up and massacre those bandits!”

“No way, I don’t want to work…”

Spending my daily life in leisure, that was my pastime—until I was summoned into another world and met a blonde loli introducing herself as Dungeon Core No. 695.

“Save my dungeon. By the way, if the dungeon core is destroyed, you’ll also go down with me as the dungeon master.”

A dungeon with a single room. Moreover, one already controlled by bandits. This is a [Checkmate] no matter how you look at it. Guess there’s nothing to do but somehow get out of this situation so that I can [Not Work]!!

Manga adaptation of LN 7 of Mushoku Tensei

Adopted from a poor, rural orphanage by a wealthy duke, Naviah Agnus wanted nothing but to win her new father’s heart. Despite her best efforts, the calculating Duke only sees Naviah as a pawn, a mere stand-in for his terminally ill daughter Vivian, who was set to marry the crown prince. But when Vivian miraculously recovers, Naviah is pushed aside and driven to her own death. When she wakes up, she is 8 years old again, but this time, Naviah is done playing nice. Can they ever really become family?

Max-level internal arts, max-level external arts.

Jianghu, Murim’s famous and strongest, Cha Shin Hyeon.

I came back to Earth after reaching the peak of martial arts, but why has everything changed so much?

A world where monsters are coming out of dungeons, and hunters are leveling up via their status windows.

‘Start again from level one? That doesn’t phase me at all, since my martial arts are already at the max level.’

At the age of 6, Ed, a boy suddenly recalls that he is a reincarnated individual from modern Japan. However, his current life unfolds in the slums of another world! Struggling with a poverty-stricken existence in his daily life, he shares his living space with and eats with his childhood friend, a girl named Miinya. Their daily fare consists mainly of 'boiled beans.' Ed, drawing upon his knowledge from modern Japan, discovers edible wild plants and leaves suitable for making tea to improve their dietary situation. In pursuit of a slow life, Ed's life of gathering and hunting begins!

From NovelUpdates:

The high school girl Manami who had fallen down the emergency stairs at school had, before she noticed, become a three year old in the world of an Otome Game. What’s more, that little girl was one of the rival characters that appeared in the game; the can’t-take-a-hint-burikko-type-rival daughter of a marquis family. What awaited her at the end was social obliteration. Though she did get a bad feeling about this… Manami decided not to worry! It was a dream after all, so that had nothing to do with her. For now, she’s going to master magic! Hooray!

Like in the famous Osamu Dazai's book "No Longer Human"/ "Disqualified From Being Human" (Ningen Shikkaku) , the protagonist of this story attempts a double suicide with his lover... except he gets hit by a truck and summoned to another world instead.
Now he wants to find his lover, so he can commit suicide with her.

Harold is the descendant of the hero who defeated the evil demon king. In this peaceful era, Harold has become a convenient handyman for the townsfolk.

One day, a sacred book predicting the world's destruction is discovered. The condition to avert this catastrophe is... "you must complete the 'Newlyweds Quest' with the demon king's daughter." Thus begins Harold's unexpected married life with Yona, the demon king's daughter.

While Harold still feels bewildered by all this, not only can Yona perfectly handle the household chores, she sweetly pampers him when he's tired. However, she harbors a secret...

Hinowa Tomari is a normal high schooler, until one day he's told that he has to become the wife of a mysterious creature called Kanenogi.

This is the start of their newly married life.

From a young age, Minami Harusumi has had recurring dreams of Veronica, a princess whose kingdom is on the verge of destruction. He believes them to be recollections of his past life, and that he is her reincarnation. Because of this, he is ridiculed by his classmates. One day, when the mockery escalates into bullying, he rediscovers magic - something Veronica had studied and used. Reassured his past life is not merely a fantasy, Minami tries to learn more about his past memories and the reason behind them...

One young salaryman, who adores his plug-in, hybrid car that uses both electricity and gasoline, had been using camping in it as an escape plan from everyday life. Suddenly, he finds himself transported to another world with his car!

He'll start his life anew in this different world!

Leon was reincarnated in the world of an otome game that he was forced by his sister to conquer just before his death. He tried to live a peaceful life as a mob character, but he encountered a scene where a female student ignored the flow of the story and tried to become the main character. Leon ended up seizing Marie, a girl who had a similar atmosphere to his sister from his previous life, and succeeded in thwarting the scheme. It should have have been the right choice... but why was he feeling uneasy about it?

“Mister Perfect”

A living legend in the realm of mixed martial arts, the Champion, Kim Sanghyuk, was somehow reborn in the Murim world as the youngest son of Keum Hojang!

“This time, I’ll forge a new legend in the Murim!”

Against the backdrop of martial artists and untrained fighters scattered around Murim comes an oddity trained in Boxing, Taekwondo, Muay Thai, Wrestling, Jujitsu, Capoeira, Judo, and a variety of modern martial arts, ready to shake up the Murim!