From Viz:
The more Wedding Peach and her friends Yuri and Hinakiku discover about their new-found magical powers, the more Rain DeVilla and her evil henchmen vow to destroy them. In the never-ending battle between love and hate, three young girls are the world's last line of defense against the onslaught of evil.

Main story is in vols.1-6. Vol.7 is a recap volume.

“Tia, your brother has to do well for you to do well.”

By committing all sorts of evil acts, she made her brother the emperor. But her dedication was rewarded with betrayal. At the brink of death, the one who extended a helping hand was her arch nemesis, the righteous Grand Duke Cedric.

"Devise a plan."
"..."
"I can't think of anyone else who could turn the tables in this situation, Lady Rozan."
"..."
"Lend me your strength."

It wasn't possible to restore the balance of power for an empire that was already falling into ruin, but there was a way... to turn back time before everything went wrong.

With her blood and tears, she sacrifices her own body to cast ancient magic in order to turn back time.

This time, she wouldn't fail.

Returning back to her 18-year-old self, Artezia resolves to become the villainess for Grand Duke Cedric.

"Please ask for my hand in marriage. I will make you the Emperor."

An official spin-off of the the super famous fantasy "The Eminence in Shadow".
OP main character × isekai reincarnation × misunderstandings!? This is the beginning of a spin-off of the super-famous web novel isekai fantasy "The eminence in Shadow".
Cid is a boy who reincarnated in another world, and decided to enjoy a scenario of being "the eminence in shadow, someone who meddles with the story from the shadows, and exhibits his true power in secrecy". Thus unfolds the story of him and the secret organization he leads—shadow garden—as well their their pleasant friends! An easy-going 4-koma manga starts right here and now!

I found myself possessed in a game I used to play occasionally.
And to top it off, I'm the female warrior of a barbarian tribe that only has bad endings.

...Alright, let's escape.

Late at night in the middle of my part time job at a convenience store, I had an encounter with a robber and was mercilessly stabbed to death.

As I was about to lose my consciousness, I thought about how much I wanted to do this and that when I heard a voice……

『The wish to be summoned has been confirmed. Granting Unique Skill 《Jack of all Trades, Master of None》』

Rude words such as that were said. Jack of All Trades, Master of None? Don’t screw with me!

Such thoughts and wishes were for naught as my consciousness faded, when I came too I was standing on a green foggy hill.

(no overpowered protagonist and no harem)
[Description from novelupdates.com]

Aikawa Eri dies in a traffic accident after staying up all night playing an otome game. She reincarnates as Eris, the villainess of her favorite game. In order to avoid the bad end, she tries her best to change the story, but as expected, it’s hard to rewrite fate…

She is abandoned by the prince. Even more, her life almost ends when she is attacked by a gang of thugs, but a young man appears...

Will the antisocial prince change her destiny? This is the reincarnated villainess’s rebirth romance fantasy!

Scamming all day, every day, often venturing alone. He bluffs to get the ultimate power in this cultivation world?! world traveler Xue Que doesn’t always bluff, but he needs to.

I wanted to design!

A dream I have had since I was 12 years old and have nurtured since then. For thirty years I worked hard, not missing a single day, but the reality is that I'm a construction site manager constructing buildings for other people. If I hadn't made that choice back then... Would I have become an architectural designer? Thirty years after all that, a miracle happened to me.

I went back to my university school days 20 years ago, in 2010.
I'm 22 years old, but with 20 years of field experience, I'm going fulfil my dream of being an architectural designer and make world famous designs of my own!

Dragon Ball Super will follow the aftermath of Goku's fierce battle with Majin Buu, as he attempts to maintain earth's fragile peace.

A scholar who failed the national exams is picked up by a martial arts master and given the task to record his life into a book. Through their journey, Son Bin meets many great people and soon finds himself following the same path as the master, as the Martial Arts King.

From Udon Entertainment:
When Mara Shin’s dog Toto gets lost one fateful day, she follows his trail along some yellow brick road and ends up in the wonderful land of Oz! Everyone instantly starts calling her Dorothy, but these aren’t the cowardly lion, brainless scarecrow and heartless tin man adventures you remember. This fantastic fairy tale features familiar characters…but with a definite action/animated twist!

A classic redone for new fans. Met Mara Shin a ordinary student whose life was normal until one day she chase after her dog Toto. That when she saw the yellow brick leading her to Oz. There thing are not the same Oz that we know. Colons, Robots, and Chimeras oh my. So join Mara (Dorothy), Abbe (Scarecrow), Namu (Tin Woodsman), and Tail (Cowardly Lion) down this twist adventurer down the yellow brick road.

When Ivy was born into this world, she remembered her past life.
Remembering her preincarnation, she strove to avoid strife.
But fate curdled at the status check, when kids learn who they are.
For she had only one skill - Taming - and not a single star.

Ivy was weak from the start - at most, she could tame a slime.
Her parents hated her for it (apparently, being weak is a crime?)
Only one woman in her village would treat her as her own.
But after she "died", Ivy got the hint and ran from home.

She met a slime and named him Sora (she's a gamer?)
And such begins our story - of a small girl who's a tamer.
Yes, you may be scoffing at that tag called "isekai"
But you know the rules, and so do I.

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.

Jihoon was leading a draining life due to his demanding professor, when one day, his daughter fell out of thin air!

Thanks to Chaerin, who was as smart and pretty as an elf, things started to look up for him. His skin started to get better, his eyesight and intelligence improved, and he even got taller and more handsome.

This was all according to his daughter Chaerin’s plans!

Jihoon, who used to be an ordinary science and engineering university student, became a researcher leading the Fourth Industrial Revolution, AI!

From AQUA Scans:
The curious prince of the mermaid kingdom, Naru, sees a human girl, Nami, and falls in love with her at first sight. Yearning for her love, he seeks a witch to turn himself into a human! But to gain this form, he has to exchange "something" in return...

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!

"...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!

Who will you “play” with tonight—? A sweet and sugary harem romantic comedy about sleeping with elves ♡

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 )

“Your names will be Arjen and Arien.”

We were just like any normal twins going to high school, but then we lost our lives to a sudden accident and our second life as twins began!

And so we live inside an abandoned palace along with an abusive mother and a cold-hearted emperor as a father.

But on our 5th birthday... The king suddenly wanted to see his children.

"Why so suddenly?"

We can only trust ourselves!

Initiate the twins' Project Survive the Palace!
Links:
Promotional Video: https://www.youtube.com/watch?v=_cWvQ8JJxDw
Original Web Novel: https://page.kakao.com/home?seriesId=51841156