Penelope Eckart reincarnated as the adopted daughter of Duke Eckart and the villainess of a reverse harem dating sim. The problem is, she entered the game at its hardest difficulty, and no matter what she does, death awaits her at every ending! Before the "real daughter" of Duke Eckart appears, she must choose one of the male leads and reach a happy ending in order to survive. But the two brothers always pick a fight with her over every little thing, as well as a crazy crown prince, whose routes all lead to death. There's even a magician who's enamoured with the female lead, and a loyal slave knight! But somehow, the favourability meters of the male leads increase the more she crosses the line with them!

This is Penelope’s survival story, who’s been dropped in an insane reverse harem dating sim!

The virtual reality game “History of the Archana Continent” became part of reality, and “players” who were synchronized with humans appeared to protect the world. Lee Hoyeol, who was an ordinary salaryman, took over the body of the character he created in middle school, “Grandfell Claudi Arpeus Romeo.” Under normal circumstances, it would have been an absolute failure of a career, but Grandfell, whose occupation is a “demon hunter,” becomes extremely proud in front of demons! The only demon hunter in this world, Grandfell (= Lee Hoyeol) starts to make a move!

“The Hero defeated the Demon King in the war of men against demons…” Those kinds of stories are a thing of the past. Nowadays, adventurers, demons, Heroes, Demon Kings, and so on are all occupations that no longer involve putting one’s life on the line. Peace has returned to the world, and dungeon exploration has now become a form of entertainment. Adventurers and monsters now all fight using clones they’ve created with magic in an extremely popular form of dungeon clearing where nobody dies. The footage of the dungeon getting cleared gets broadcasted all across the continent, and I’m a member of a Hero’s party that was ranked the 4th most popular in the world… but not anymore. Parties had a limitation of 5 members, and I was told that an unpopular job like Black Sorcerer would only get in the way of getting to 3rd place or beyond.

Now that I became unemployed, I was forced to find another party but I just couldn’t find one. One day, I encountered a beautiful blonde red-eyed woman who told me she had a job for me. After being so touched from having someone recognize my abilities far more than my past comrades, I ended up agreeing to take an interview without asking for the details. When I arrived at my destination, I was at the world’s hardest dungeon where no party has ever reached the final area, the Demon King Castle, where the Big Four and the Demon King were waiting for me. This is the story of a Black Sorcerer that was kicked out of a Hero’s party and joined the side of the Demon King Army to repel the Heroes. (Source: Novelupdates)

Or
Please read the title again.

Artist's Twitter (NSFW): https://twitter.com/kana_kkn
Orignal webnovel: https://ncode.syosetu.com/n4836fm/

After diligently following the “demon king’s standards,” I ended up getting killed by the heroes.

What, my tower and I are a custom-made hunting ground for heroes now?

With this chance at life regained through regression, to hell with the damn demon king’s standards!

This is the story of surviving as the hard-headed(?) demon king, Berje!

One day Kang Songhyun opened his eyes on the Azul Continent.
He didn’t know the reason.
When he woke up he was no more in South Korea.
He’s thrown into a fantasy world.
‘Why did I come to this kind of place?’

At that time, the status window pops up in front of him
[Your job is ‘healer’?]

But among his skills…
‘huh? …No healing?’
That was the beginning of the life of an unlicensed healer. A healer who does not know how to heal.

Kang Songhyun is good at everything except healing
In a fantasy world as an unlicensed healer his story of survival begins.

A Twitter series about a handsome salaryman and an unapproachable office lady who dress completely different when they are off work.

Kenjiro, a first year high school student, has had a crush on Tozaki-san, who is in the same class with him since the beginning of school. Tozaki-san is kind to everyone, but for some reason, she only has a cold attitude towards Kenjiro.

The story of two foreign men living in Japan.

(from ebookjapan):

Nick, with his stylish hair, and Lever, with his dazzling eyes behind his sunglasses, are a HOT & CRAZY foreign duo who will face any obstacles that come their way!

The genius Kyogoro Miyata, who wastes no time in drawing, unleashes a shocking high-speed manga. Nick and Lever are finally here!

Every time she opens her mouth, it's nothing but abusive language, and her problematic behavior never stops. The protagonist has had enough and sets a “plan” into motion…??!

Liz who remembers being dumped by her lover in her previous life decides to live freely in her current one.

Holding a mysterious power, she was invited to the palace as a saint candidate where she meets with the crown prince who was actually her former lover from her previous life.

Though Liz looks to be the weakest among the saint candidates she is (likely) the strongest among them.

What happens when two yandere stalkers fall in love with each other?

Cedric, the Great Sage of Heaven. He was called a living legend because of his overwhelming magical power until he died an unlucky death due to the betrayal of his subordinate. Feeling the limits of his power, Cedric plans to start over by reincarnating as a child. However, he gets reincarnated in the body of a bullied student! For the young man who went as far as to give his life to call Cedric, a revenge drama of the strongest great sage begins!

Sora, a Japanese boy who was summoned to another world, gained the skill "Walking". Its effect is that "no matter how much he walks, he never gets tired". Because of this weak skill, the king expelled him from the group of summoned heroes. But when Sora starts walking in another world, he suddenly levels up!

Walking had a hidden effect of "gaining 1 EXP for each step taken". He acquired useful skills such as 'Appraisal', 'Alchemy', and healing magic...

Getting one skill after another, he became talented just by walking! The adventure to encounter and touch the unknown is about to begin!

Dogged by pain and misfortune from the very beginning, Shin-Ae decides she wants nothing to do with people nor anything to do with romance. Although content with her unsocial, boring, loveless existence, her lifestyle is challenged after she ruins an unsuspecting strangers' clothes.

The manga is a re-imagining of the famous Journey to the West story, and centers on the Buddhist priest Genjō and his journey to India as he is accompanied by three beautiful and charming women: Son Gokū, Cho Hakkai, and Sha Gojyo.

An abused little girl with nothing to live for meets an old man with a nasty personality

I reincarnated into the body of a fake saintess who will die when the real saintess appears five years later.If I were to gather the monthly allowance given to the saintess I can at the very least buy a building!But while I was carefully setting up a plan to run away after playing the role of the saintess..."Choose me, or else...""I prepared a prison just for you. My goddess—""..."The male leads reacted differently than I expected. [The bored divine beings have started to gain interest after watching you.]I, Ariel, unexpectedly gained the interest of the gods.On top of that, the final boss who is planning on destroying the world isn't killing me, but helping me...? I have no interest in gaining the interest of the gods or destroying the world! So please just let me become a landlord like I wanted—!

The main character is reborn as a character of a game he played in his previous life. This character falls into ruin along with the villainess, spending the last of their years together, a man named Kururi Helan.
No details of this are written inside the game, it can’t be understood why this sub-character ended up with the villainess. However, that is of no importance.

Living as a needy farmer along with someone is unpleasant, so the main character seeks a profession. For now, he aims for becoming a blacksmith as he originally had skill in it.

A soft skin, short and coarse fur, tiny feet… What is that strange and cute creature? Hegol (skeleton) is independent and wants to raise a baby cat. He finally got a cat from the human agency service on the day he moved houses! But the baby cat got less fur on it's body… Does a baby cat look like that normally? He cannot contact the human agency service, Hegol takes in the sleeping mutated baby cat! To make matters worse the cries from the baby cat are pouring in number of protests and complains from the neighbors… can Hegol… Can he raise a baby cat? The big nursing Operation of the baby cat inside the Devil kingdom with the skeleton Hegol, the devil Adam and the succubus Lily begins!!!

[Adapted from one of the old top novels of all time!]
God created the Abyss to escape his boredom. Trapped in the hellish Abyss, humanity was on the path to the apocalypse… “Is it over for us… now…” On the brink of humanity’s annihilation, the four strongest survivors tried to prevent it by traveling back in time to the point just before humanity was pulled into the Abyss. But only one of them could go back to the past. “What’s there to think about? Isn’t it already decided who’s going? The strongest among us, Kang Hansoo.” This is the story of the life of the legendary powerhouse, Kang Hansoo, who returned to save humanity from its doom. Will he be able to save everyone?