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]!!

Hiel was ridiculed for having a useless crest and was exiled to a remote island. When he grabbed an ice axe to reclaim the island, the true effect of his crest was revealed. With his production cheat he will reclaim this uninhabited island and start his life in paradise.

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!

Iruma Takumi, a 40-year old salary man, was dragged into a hero summoning just like in a template. What was his fate? The Goddess sent him and the heroes to the other world separately.

With the Goddess’ overprotective support, he landed in a different world looking handsome, rejuvenated, and quite different from a Japanese.

Although he wanted a slow life while working in the manufacturing trade, that was not permitted by the Goddess’ special body and abilities.

Would Takumi be able to live a peaceful life in a different world?

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!

Third part of the story of Dance in the Vampire Bund, and direct continuation of Dance in the Vampire Bund - Scarlet Order. We return to the story of Mina Tepes, the princess of the vampires, and Akira Kaburagi Regendorf, her faithful guardian, in her search for the coexistence between vampires and humans.

The story is set in a “land where two worlds intersect,” and it centers on “a strange romance between a boy and girl who meet by fate.”

In the Elgrand Kingdom, a certain earl’s daughter was well-known. Captivating men and women of all ages with her beautiful looks, she did as she pleased. To those who defied her, she had no forgiveness, crushing them thoroughly, and she caused misfortune for multitudes of people simply for her amusement. Beautiful and cruel, with sharp thorns, she was the “Rose of Ice.”

“Um, who is that story about?”

This is the story of an earl’s daughter, who will have everything she has to do explained the day after tomorrow, and who, after all sorts of troubles, tries to somehow attain happiness in the battlefield of women called the inner palace.

Note: Adapted from the first "villainess" WN, published in 2012.

Deep in the unexplored reaches of the dungeon, a corpse is discovered—one that shouldn’t exist. After Iarumas is resurrected, his memories of life before death are gone, and he spends his days delving into the dungeon to retrieve the bodies of dead adventurers. Can they be revived as well? Or will God reduce them to piles of ash on the altar? Either way, Iarumas collects his finder’s fee. And though his skills earn him some grudging respect, he’s also scorned for this cold, utilitarian attitude. The living keep their distance—Iarumas consorts primarily with the dead. That is, until he meets Garbage, a feral young swordswoman who’s the sole survivor of a massacred party. With Garbage by his side, Iarumas ventures deeper, scouring the dungeon for clues to his past, avoiding monsters, traps, and the inevitability of a permanent ashen demise.