High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O'ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.

Shirosaki Reito was suddenly sucked in by a mysterious crack and got transferred in between dimensions. He got reincarnated as a baby in another world. He was born in the royal family and was the heir to the throne, but he was driven/kicked of the palace. The reason was that he was born as a Support magician and had Alchemist as a job which was the lowest job that existed in the new world and people who had that were considered jobless. But there was a secret hidden in that job!!
From jobless to the strongest job!!!

I accidentally took possession of someone in a 19+ reverse harem novel.

The problem is that I became Roxana Agriche, the older sister of the sub-villain. My damn father kidnapped the heroine's brother. Now, is the only thing left to meet a terrible end from the vengeance of the heroine?

But what if I can avoid that horrible development?

“I'm also interested in this toy.”

"I'll protect you until you can get out of here safely."

The heroine's brother, Cassis Pedalian, will definitely be able to pay me back later.

※Please be advised. This work contains somewhat sadistic expressions and portrayals of bloodshed due to the nature of the genre. There are images that may make you feel a little uncomfortable, so please take note.

Additionally, this is not smut; it's just R15.

Cruz was reincarnated as a low-class demon into Makai, the underworld. In her past life, aimed to be an A-list pâtissière, so now she’s bewildered by the jet-black food of this world! However, she was touched by the kindness of the demons around her. She declares, “I wish to make the citizens of Makai happy with sweets!” Thus, Cruz creates Makai's first “parfait” with limited materials. When the demons first taste her sweets, they become instantly captivated! Furthermore, even the most powerful Demon King of all time has heard rumors of her and summoned Cruz to meet him…?!

Her family used all their money for her extravagance and luxuries and brought a crisis of bankruptcy. While trying to figure out how to pay off their debts, she found a leaflet from the duke looking for a lost child. The reward is so much money that she could play and eat even after she payed off her debts! Following the memories of reading this book, right away, Lizelle picked up the boy who was caught in a trash dump in a poor village. She took the lost Lapel and went to the duke.

"This is the child the Duke is looking for."

Duke Chester said, looking at me with a doubtful glaze, "I need confirmation, so you should stay with my nephew in this house for the time being."

The strange cohabitation of the three people started like that. However, Lapel keeps thinking of her as a mother and won't let her leave.

"Let's get married."

Lizelle was startled by the unexpected words, "Are you insane? Did you drink?"

"One year. If you perform a contract marriage for one year, I will pay you ten times the amount of the rewards you were given."

"Can I call you 'honey'?"

And the contract marriage and marital life began. But why are his eyes constantly changing? Why do you keep coming every night!

After falling into the gap between worlds, I gained “the ability to identify something’s status” for the cost of a single limitation. However, other than this skill I was completely ordinary. All I could do after landing in a strange world, was see through the status of things and use that information for my own growth.

One day, after being assaulted by enemies, a lone figure appeared and saved my life. What’s more, that person had an incredible “secret”.

Humanity's greatest gym rat Hansol, lost consciousness during a deadlift. When he opened his eyes, he arrived at a different world. Monsters appeared in front of him, and all that he could see was protein...? "I'll flip this world by working out!"

Makia is a noble lady descended from an infamous witch. Thor, a boy who was raised with her and came from another world, is chosen to be the knight of the "savior". The two are forced apart and to see Thor once again Makia aims to be the top student at Magic School!

Yamada Takashi lost his life in the snowy mountains—that is what he thought, but he then appeared in an unknown place; another world that looked like the game he played. Moreover there are many things that he doesn't know... While puzzled, he still retains the strongest class ability and is relieved.

High rank magician, "Wise man" Marius is still living till today.

Hiroki, an office worker who works for a black company, likes anime and manga about being reincarnated into another world. One night, he hated his job so much that he said, "If there is a different world, I want to go there...!". To be summoned as a mage...! The days with the elf Millia, who is the owner of the heavenly voice, and the dragon Sophie, are completely different from what he imagined them to be. A different world comedy starts now!

King Grey has unrivaled strength, wealth, and prestige in a world governed by martial ability. However, solitude lingers closely behind those with great power. Beneath the glamorous exterior of a powerful king lurks the shell of man, devoid of purpose and will.

Reincarnated into a new world filled with magic and monsters, the king has a second chance to relive his life. Correcting the mistakes of his past will not be his only challenge, however. Underneath the peace and prosperity of the new world is an undercurrent threatening to destroy everything he has worked for, questioning his role and reason for being born again.

Official English Novel: https://tapas.io/episode/571162

Anezaki Satoru, a Genius had his childhood friend murdered and raped, he then tracks down her 15 killers and he murders them, he then gets sentenced to death for his crimes of murder, after being executed though, he found himself in a parallel apocalyptic world...

A hero with a production skill?? Akina Shoji, a salary slave, had a dream to open his own business. However, when he almost made his dream come true, he’s been summoned into another world with a “Cultivation” skill…

I confessed. I couldn't do it while sober so I took a shot of liquid courage.

“I like you.”
“Why?”
“I just like everything about you.”
“... I don't understand.”

Something's strange. His voice is deeper, his height slightly different, and his physique even more so. In fact, after a closer look, even the hair colour that reflected the moonlight⁠—this is crazy. It’s someone else. It's none other than Duke Cabel Willard who's known as the 'Grim Reaper' of the battlefields.

“Cabel.”
“... Excuse me?”
“From now on, don't refer to me by any strange titles. Call me by name instead.”

The corners of his lips that were always frozen stiff curved into a smile. It seemed like he would immediately kill me if the truth of my false confession was brought to light.
Official Chinese Translation: https://www.kuaikanmanhua.com/web/topic/5965/

In middle school, Konoha Satou dreamed of escaping into a world like that of Dark History, a romantic fantasy novel she wrote telling the story of the count's daughter Konoha Magnolia and the knight she falls in love with. Years later, her mother rediscovers that novel - only for Konoha to get hit in a traffic accident and die!

When she opens her eyes, she finds herself in the world of her own creation as the heroine's younger sister, Iana Magnolia. Somehow, she's been reborn as the character she created to be the greatest villainess of all time?!

Ghost-seeing School Boys oneshot included in volume 1 as chapter 3.5

The stoy of an elf queen who got isekai'd from her world into our world. Her name is Lady Elfinn, our titular queen.
And a sweet boy who believes in the Elf supremacy. His name is Isuzu.
Their fates clash after Isuzu gets assigned to take care of Elfinn, and help her accomplish her task: To become the queen of the human world and to guide us into a better future.
In order to help her with their final goal he proposes...

To master the old ways of the S&M to conquer the world!?
What awaits them in the future!!??

Game strategies and bursting with cheats: a second life! The strongest boss in the history of RPGs takes the world by storm! One day, the Demon Lord Menas is attacked by the empress of the Noahic Empire and her Revolutionary Empire. In the face of a beautiful blonde girl, Alex, a mysterious sense of deja vu washes over him… This looks just like the prologue of the game “Resis-Noah” in my dreams! After realizing that he is the final boss of this world, he decides to fake his death so he can enjoy a new life. With his cheats in hand, the new dark hero strives for a life of freedom!!

Guy reincarnates into the gardening apprentice who works for the rival character of the heroine of an otome game.
He doesn't care and just wants to be a gardener.

Original Novel: https://ncode.syosetu.com/n1313ff/

A young man unfortunately died in the modern era, he reincarnated in another world under the name "Eldo," which also happened to be a world similar to a VRMMO game that he used to play in his previous life. However, it's a world where he knows the "basic skills." Eldo became a level 1 adventurer, playing as a "novice," but he knows the world better than anyone, and this is because of the "data he knows." Will the reincarnation in this world make him strong?

On the way home from school, Kashiwagi Aki is kidnapped and finds herself in a world populated entirely by beastmen. She ends up in a pet store where the overzealous and impulsive wolfman Zinovy becomes infatuated with her and buys her on sight. Thus begins their strange and chaotic, albeit incredibly cute life.