I reincarnated into the "Villainess Eumiella" from an RPG Otome game. In the main story, Eumielle'as merely a side character, but after the ending, she reenters the story as the Hidden Boss, a character on par to the Heroes with her high stats!!

Lighting a fire in my gamer's soul, and taking advantage of being left on my own in my parent's territory, I train! Train! And at the end of my training...... By the time I enter the academy, I managed to reach level 99.

Though I had planned to live out my days as inconspicuously and peacefully as possible, soon after entering the school, I'm suspected by the Heroine and Love Interests of being the "Demon Lord"...?

A popular Web novel of seeking a peaceful life, a fantasy story of the strongest villainess!

The manga centers on veteran novelist Mariko Kōda, who lives with the families of both her son and her grandson in one house. Feeling like she no longer has any place in her home, she decides to leave the house and strike out on her own, beginning with living in a manga cafe in the city.

Akihiko Shimura, 20 years old (male). When I woke up in the morning, I was a little blonde loli.

From CoyoMoose:

The world that was once supported by four evil Gods has fallen to a crisis. Using song and dance, it is up to the kashikans to bring back the Gods which fled from their confinement.

Nina had a rough start to life, stealing to survive—and eventually being sold into slavery by her own brother. But to her surprise, her captor, Prince Azure, ordained that she would live the life of a princess... specifically, that of the recently deceased princess-priestess, Alisha. But despite her changing fortune, Nina won't give up her old life without a fight... and Azure might just be the one to finally match her wits. But how much can she trust Azure? And can she stop the feelings budding in her heart, knowing she must eventually marry another...?

Note: Won the 46th Kodansha Manga Award for Best Shoujo Manga in 2022.

A young girl named Rahzel is booted out of her house one day by her father with the instructions to 'see the world.' And so her journey begins. However, she won't be doing it alone... for she befriends a stoic young man named Alzeid seeking revenge for his father's murder.
Alzeid and Rahzel are like oil and water... but even still, they feel strangely drawn to one another. This could be either the result of an underlying attraction -- or their shared powers with magic. And so, the two reluctant allies travel from town to town, using their powers to help the helpless, while discovering their own respective places in the world.

An empire stained with blood

That day, consumed by the cursed sword, I cut down the people I loved most with my own hands.

Fifteen years have passed under its curse. Now, having claimed all ten legendary swords forged by man, I made a wish upon the holy sword.

"Take me back—to the time I killed anyone."

Time rewound to the moment before all tragedies began. And yet, the sword remained in my hand.

This time, I won't succumb in the same way. Neither the cursed sword, nor fate, nor anyone else will control me again.

"There won't be a second miracle.
This time, I will find happiness."

I absolutely hate a world filled with sweet talking. I'll fight the Heroine's rationale head on!!!

After waking up as the villainess she admires so much from her favourite otome game, Alicia trains hard every day to become the greatest villainess of all time.
Mangaka's personal twitter: https://twitter.com/mkntbr
Mangaka's work twitter: https://twitter.com/hsakari_

"When I got fired from my job, I went to a different world.."

Fujioka Noel is a hard worker for a black company, but her efforts go unrewarded when she is handed a notice of dismissal one day. Frustrated and sinking into despair, she was suddenly transported to another world..

In front of the bewildered Noel appeared Fenrir, the large, silvery-white wolf. Taking a liking to her, he took her into his care as his 'beloved daughter.' Before long, in the midst of her healing, she became caught up in events that will change the world..

Once a commoner, Wellmy Ernest ascended to nobility when her mother married an earl. She tormented her same-age half-sister at home and school, stole her heirship and fiancé, and finally sold her off to the allegedly cruel Lord of Magic. It's not like her plain, meek sister could oppose. Wellmy got everything she wanted.

One day, Wellmy receives an invitation to a late-night soiree from the Lord of Magic, likely to announce her sister as his fiancée. Wellmy attends with her mother and father, but what awaits them isn't the brilliant banquet they were expecting...it's a tribunal condemning them for their abuse of Wellmy's sister.

Which means everything has gone just as Wellmy planned...

This is the story of a lone villainess who plans to make her sister happy even if it means she's hated in return.

Lucia grew up not knowing she was a princess. But when her mother died, she entered the palace and had the chance to see her entire future in a dream. In her dream, when she reached 19 years old, she was auctioned off to the bidder who offered the highest dowry. Her life became miserable from then on. When she woke up from her dream, she was determined to reshape her future, realizing that she had plenty of time before the crucial turning point. Thus, she begins her journey to change her dark future.

A single mother who despises men is neighbors with a younger, womanizing man! Despite being scum, he is great at cooking and childcare--does that make him an ideal partner?

At least this much is "normal," is it not?

Elma who was raised in a prison was dangerously granted pardon and released. Though she tries to heed her mother's words to be "normal," while working as a maid in the royal palace, her outlandish abilities and behavior end up shaking it up in its entirety. Successfully carrying out the job of four people by herself in one morning, brewing tea that would taste as if it were blessed by the heavens, dissembling a giant tuna with one stroke of a sword, and even using a surgical procedure more advanced than recovery magic as her forte. —If not a little dangerous, even this much is normal, is it not?

The curtain opens on a story of a thoughtlessly peerless girl who had intended to be normal. (Source: Mangaupdates)

From Storm in Heaven:
The first mouse appeared on the night of a full moon over two thousand years ago. A timeless children's song among the humans tells how it made powerful mice companions and legions of war mice. Then it declared war on all humankind. Pai'yan is on of the king's honored 7 heroes, renowned for his skill in fighting the mice. He comes home after a long campaign to find his young son kidnapped by the Magic Mouse, and his son's pet kitten Toraji transformed into a half-human cat mix. Now Pai'yan travels with Toraji, searching for any word that could lead them to the Magic Mouse and his missing son.

Set 13 years after the original series, the story focuses on Miki and Yuu's little siblings.

Diarin, a priestess without any noteworthy family background or connections, always gets the toughest assignments. So when her boss tells her to help Ceres, a war hero, reintegrate into society, she decides to stop being a pushover and get as much as she can out of it, including a juicy promotion. But upon reaching Ceres' manor, she’s greeted by a growling hound instead of a human. Tasked with the impossible job of turning the mad dog into a proper gentleman, she dedicates herself to caring for him. But his unexpected obsession with her was never part of her plan.

There my fiancé stood, gazing intently at my charming younger sister. When I saw them fall in love the moment they laid eyes on each other, I was hit with an overwhelming sense of déjà vu.

Aah, again?

My fiancé had been in love with my younger sister even in my previous life.
There was nothing I could do but watch it all unfold.

And for some inexplicable reason, I’m the only one who keeps returning to that exact point in time.

Trapped by fate.

And yet, amidst the turns of the hourglass, I still find myself falling for him…
Artist's twitter: https://twitter.com/pimashiro

When six-year-old Inés laid eyes on the handsome heir to House Escalante, she promptly made the boy her fiancé. Since noblemen are all the same, she figured she might as well choose a pretty one. But Lord Cárcel isn't ready for this sort of commitment just yet, and he spends the next decade and a half avoiding the marriage at all costs!

Luckily, that's no trouble for Inés, as this marriage failing is exactly what she wants. In fact, he has her blessing to sow his wild oats as long as he stays out of her business. Unfortunately, being a playboy isn't as fun when your fiancée gives you permission. And doesn't this mean she's cheating on him too? Now, Cárcel is determined to change Inés' mind about him and prove he can be the husband she's always wanted.

I‘ve made up my mind. If I can't be an empress here, I'll be an empress somewhere else. The popular web novel Remarried Empress has been adapted to webtoon!