Kardinal, a researcher who loves light novels, had been reincarnated as the villainous daughter of an otome game. Her banishment flag is raised, but oblivious to the game's storyline, she doesn't know how to overcome or avoid it. She makes the critical decision to live on her own and become a villainess until the very end! She'll rise up in this unknown world embracing her new role.

The manga centers on a man having love problems at work, when a girl appears before him who turns out to be his reincarnated mother.

Reincarnated to a werewolf magician, the Protagonist Veight was instated as the vice head of the Demon Lord's third brigade force. Occupying a remote market town, he was entrusted to management and defense. As a former human, born a monster, I can understand the sentiments of both sides well enough. Because of that, those around seem to think I'm a man of wisdom, or something of the like, but it's really just one trouble after the next. I have to follow those monsters that are overly quick to resort to violence, and do something about the humans, who start to complain immediately. So today as well, I'll do my best at managing the Demon Lord's main force.

When the Demon Tribes led by a Demon King appeared and launched a massive war at mankind, all hope seems to be lost, until a brave group of heroes managed to turn the tide and even defeated the Demon King.

John Serieux, a mid-ranked soldier of World's Resistance against the demon's army, had fortunately been able to witness the Demon King's fall by the Heroes, but also was unfortunately killed a moment after. Miraculously, he was still able to open his eyes, only to realize that his mind had been sent back to the past when he's still a baby!

With all the memories of his adult years, the knowledge of many scientific breakthroughs during the war, and information of the upcoming great disaster all intact, John is determined to cultivate his potential efficiently and optimally to help change the future for the best.

The Sophen country had been destroyed by the empire. The sole daughter of a count family, Leylin Efran, had to find a husband to be able to inherit her family. So she wouldn't have to suffer through loveless marriage, Leylin decided to find a husband to have a one-year contract marriage with. In the middle of her quest, a young and dashing man appeared before her. Leylin was convinced this is the right man for her, but is he truly the answer to Leylin's perilous situation?
Original Novel: https://ridibooks.com/v2/Detail?id=2008012958

Official Japanese Translation: https://piccoma.com/web/product/14746
Official Chinese Translation: https://ac.qq.com/Comic/comicInfo/id/645647
Official Indonesian Translation: https://kakaopage.co.id/content/Aku-dan-Pernikahan-Palsu/3247

“Who’s this male prostitute-looking kid?” I am the Matchless Ha Hoo Young, the greatest martial artist reigning over all the lands! There is no one that is my equal! I was drowning in futility and emptiness because there was no more that I could accomplish in the human realm. To reach the peak of martial arts, I must become a saint! “I finally succeeded!!!” “Stop! Your ascension is not permitted!” The other saints refused my ascension due to my karma after much slaughter, and I fell, just like that.
When I woke up, I was 60 years in the future. I was reborn as the second lord of the Namgoong family, Namgoong Hyuk. Where has all the internal energy that I’ve accumulated gone?! Moreover, I have the Nine yin energy blockage?

Tanaka is a middle-aged man with a face only a mother could love and a personality that no mother could love. After dying from an accident, a god sends him to another world where he has healing magic.

Join Tanaka as he goes around ogling beautiful women and then watching them get fucked by men other than him. This is a new manga version of the LN isekai series of the same name, so if you read the first series you sure as shit know what’s going to happen.

Jung-woo is stuck in a reincarnation cycle along with his nemesis, Shin-Ryong. Ever since he was little, he had a dream.
He wanted to become strong enough to conquer Murim.

However, things did not always go the way he planned. Shin-Ryong defeated him on every occasion.
At this point, Ha Jung-woo had been reincarnated 5 times and was defeated yet again.

When he is reincarnated for the sixth time, he is born into the modern world.
Being born into a new world changes Jung-woo's goal, as Murim is gone.
Yet he continues training in order to defeat Shin-Ryong.

Ultimately, he prioritizes the goal of becoming stronger to defeat Shin-Ryong, while trying to adapt to this modern world where he has a family and goes to a school like a normal person.

Zeff Einstein spent his whole life mastering red magic and was finally recognized for it, yet a new spell that was soon created revealed that his talent for red magic was his lowest. Bitter at the thought of all his wasted effort, he creates a spell to send his old self back in time to his younger body and together with the determined "genius" mage Milly and the handsome swordswoman Claude, he intends to master magic more efficiently this time.

Lee Hyun Ho, an ordinary man who was looking for a job in Korea, has been reincarnated into a prince from the Joseon dynasty.
But unfortunately, he was reincarnated into Grand Prince Jinseong, the younger brother of the tyrant Yeonsangun!
Although he graduated from a decent school, Hyun ho struggled to find a job.
One day, he went to sleep after spending his day living the ordinary life of a poor Korean, and when he opened his eyes, he found himself as Grand Prince Jinseong from the 15th century.
Since he was now a rich prince, his plan was to live the high life but…
He finds out that his brother is Yeonsangun, the king of Joseon, infamous for being a crazy tyrant!
And thus marks the start of the ordinary job seeker, Grand Prince Jinseong’s (Lee Hyun Ho) plan of making the tyrant Yeonsangun into a great king and to protect his own wife.
The unpredictable "Yeonsangun mental care project"! "Alright~~ Let’s change history!"

A Company President diagnosed with cancer accidentally transmigrated into a novel, and became the villainous emperor the male lead is going to kill?! On top of that, this male lead is the prince of the enemy kingdom that is being imprisoned by him at this moment…. Feels like he just took a step closer to death! No way! In order to live, I must please him, but I never knew that it wasn’t just simply hatred between us….

After reincarnating, I found myself as the Villainess in an Otome game I often played in my past life, the world of “Love☆Magical”?!
Although I reincarnated as the Villainess Isabella…having memories of my past life, if I let the scenario play out as it did in the game, I’d be going down the execution route…?! To free myself from the worst possible ending, my noble battle begins, however…
Is it possible I could fall in love with the non-Love Interest character I loved so much in the past, can I really…?!

Can this overly unusual Villainess rewrite the ruin route awaiting her――

A bit dumb yet cute girl and a kind-hearted and tolerant girl. Those are the childhood friends of the boy whose peaceful life is turned around after being reborn in another world.
Will they be able to survive in another world with only a skill for hitting really hard!?
They’ll manage somehow...!

Entering high school, Fujimura Kotone dreams of making friends and finding love. However, her classmates avoid her because of her scary demeanor. One day, a group made up of two girls and a boy come into her class and kneel before her, proclaiming, "It's an honor to meet you, Demon Lord!". With their antics, will she be able to obtain the normal love life she desires?

A reincarnation romantic comedy that transcends space and time!

The isekai fantasy story centers on a man who dies due to overwork, a phenomenon that has unfortunately become a known problem in Japan. Just before dying, the man thought that if he was reincarnated, he would want to live the lazy life of a rich man's dog. His wish is granted, but it doesn't turn out the way he anticipated. He comes back to life in another world as Rōta, a dog who belongs to the daughter of an extremely wealthy person. However, at just one month old, he is easily larger than a human, and he realizes he is no ordinary dog.

Our protagonist was reincarnated into a world with goblins and dragons....but his optimal job is "villager". Using the cheat "getting one chance to redo life after death" he will show you what a villager can do.

Passing to another world at the sound of duang, divine doctor in both Chinese and western medicine Feng YuHeng became the abused first wife's daughter of Da Shun Dynasty at the fraction of a minute. Wanting to kill me, one scalpel will cause you hemiplegia? Fighting with me? Carrying the pharmacy, holding fame and profit, even the Emperor worms his way into being friends with me! But what is the circumstances with that engagement, a disfigured lame person wall thumbed me, also wanting to help labor and capital to gain the world? Rogue Prince are you foolish!

"My dear villainess, do whatever you want to do. Just don't see that son of a bitch."

A girl dies and is reincarnated as Sasha, the daughter of a poor noble family in a romance novel she used to read. To survive in her new life, she approaches noble ladies with her innocent appearance and cold wit. Hence, she got the nickname 'The Nobles' Pet.'

Rebecca, the villainess of the original work and the Prince's fiancee, appears in front of Sasha, who's using her talent to live the sweet life. Knowing the end of the original, Sasha tried to stay away from Rebecca, but she cannot take her eyes off her cool and collectedness! So Sasha uses her cuteness as a deadly weapon to stand between Rebecca and the womanizer Crown Prince... and... can Sasha survive and win Rebecca's favor?

The villainess Rebecca X Healing Pet Sasha's fantasy!
Official French Translation: http://delitoon.com/webtoon/favorite-heritiere
Official Chinese Translation: https://www.kuaikanmanhua.com/web/topic/5352/

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world, exist huge humanoid weapon known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid and Adeltrud Olter: together they will aim to become Knight Runner, pilot of Silhoutte Knight.

Age 41, Oh Joong Seok. A man who did all kinds of misdeeds and put his life on the line for the organisation to gain the highest position. But who knew the end of his life would be so miserable… Joong Seok’s ‘virtuous living’ project starts now, one by one.