This talks about Rimuru and his friends spending their free time doing something fun together. A spin-off from the main series "That Time I Got Reincarnated as a Slime"

An unappealing otaku awakens in the body of a pig after he passes out while eating raw pig liver. Pig finds himself in the company of Jess, an innocent girl who can read people's minds, and she accepts him despite his boorish thoughts... although she does plan to eat him. When Jess is in danger of succumbing to a dark destiny, can Pig save her using only his quick wits, wisdom, and refined sense of smell?

A man who yearns for freedom is reincarnated and he chooses the undesirable job "Carrier"--The fastest way to conquer both women and other world with wisdom and courage! A new erotic fantasy series from Nocturne Novels!

The strongest and oldest dragon who had lived through eternity allowed himself to be killed by Hero. Just as he prepared for eternal sleep, he realized himself reborn as Dran, a villager in the frontier.

Working the field, hunting forest animal, and having a warm life has filled his heart with joy he never experienced in his whole dragon life.

One day, when he's patroling the forest near his village, he encountered a powerful demon army...

After the first Gate opened in 2018, Lim Dae-In survived for 20 years on Earth while being connected to other dimensions.

The day after his long-awaited retirement celebration, he regresses by 20 years, back to when he had nothing…

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_

Kai who was reincarnated into a different world, thrown away by the corrupt church into an isolated Island full of dangerous demons. The key to surviving on the island is the Kai's Cheat ability to summon a different world's item that Kai only used in. With this ability, Kai built a “Pioneering Village”. Kai's survival & the fate of national life!

It is a different world ability that only you can enter, cute girls and survival life!

In the Tearmoon Empire, the disdained selfish princess Mia was sentenced to death -- or at least, she was supposed to be! Instead, she woke up as her twelve-year-old self??

To avoid the guillotine in her second life, she won't repeat her past failures...

"F-for me, something of this level is an easy task!"

Ultimate self-defense! The strongest self-awareness!

Using her previously clumsy, timid princess image, she will go against fate- a once-in-a-lifetime fantasy of fixing history!

‘Heavenly Demon’ Baek Joong-Hyuk opens his eyes as the eldest son of the Dimitry family.
Known as the fool of the Dimitry family, pushed over by the second son. The world’s opinion is irrelevant.
‘Heavenly Demon’, no, Roman Dimitry, cannot live a normal life.

OP ‘Heavenly Demon’ fantasy!

Who knew that even a stationary plant could be surprisingly capable?!

Our protagonist is a saint—or was, until she was betrayed by one of her fellow saint apprentices as well as her fiancé, a hero.
In her final moments, she recalls her previous life, when she was just a normal Japanese high school girl, but that doesn't help the fact that she's being eaten alive by a massive plant monster.

And yet, by a stroke of luck, she doesn't die for good, but instead reincarnates as said plant monster. With the upper half of a human and the lower half of a plant, she must now spend her life as an Alraune.

And so, she tries to live the peaceful life of a plant, photosynthesizing all day!
Welcome to the diary of a plant girl who just wants some peace and quiet, but something always gets in her way!

Web novel: https://ncode.syosetu.com/n4444ge/

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!

From ANN:

Guts, known as the Black Swordsman, seeks sanctuary from the demonic forces attracted to him and his woman because of a demonic mark on their necks, and also vengeance against the man who branded him as an unholy sacrifice. Aided only by his titanic strength gained from a harsh childhood lived with mercenaries, a gigantic sword, and an iron prosthetic left hand, Guts must struggle against his bleak destiny, all the while fighting with a rage that might strip him of his humanity.

Warning: This manga is for mature audiences only, since it has sexual content and graphic violence (gore, blood, rape, etc). Definitely not for the weak hearted.

The 1988 Prototype chapter won a prize at the Comi Manga School Miura attended and the main series won the Tezuka Osamu Award for Excellence in 2002.

Ten years after being transported to another world.

It was more than enough time to awaken from what at first, felt like an exciting fantasy dream world. And on this 10th year Wasa Tooru gives up searching for a way to return to Japan, after being unsuccessful for so long.

It was then that a job offer found its way to him— it was to be the bodyguard of twins who have knowledge of Earth.

She worked herself to death in her past life, but then she was reborn in another world as the villainess Ronia! As expected, her engagement is broken and she's expelled from society, but now she takes that chance to live peacefully, and even opens a cafe with the help of her fairy comrades, which is becoming unexpectedly popular with beast-kin...?

Komine is an ordinary grade-school kid who is at the top of his class. And for good reason - after dying, this is actually his second run at life. Knowing everything from upcoming class subjects to future events, Komine naturally excels at whatever he does.

…and then there’s Sarara Miyano, Komine’s classmate. The last time he was in school, he was despised by her because of some foolish actions he took in the past. But now that he’s mentally older and wiser, maybe he can turn things around?

Zechs has a younger sister. Her name is Caron, and he loves her very much. However, if things continue as they are, she will die an untimely death. This world is the same as the RPG romance game he played in his previous life where Caron is destined to die in every route. There was no way Zechs would allow his beloved sister to die so cruelly - that's why he'll resist fate to the bitter end!

Original Web Novel: https://ncode.syosetu.com/n5205hi/

William is the lone human in a city of the dead. Born with vague memories of a past life in contemporary Japan where he failed to do anything useful, he is determined not to make the same mistake again, and that this time, his life will be lived. But what does that really mean? Raised by a group of the undead, William must discover what circumstances brought him to this city and these people as well as what it means to not just exist, but to live a full life.

A man who lost his family and fell into the depths of despair meets his end—only to be reborn in another world of swords and magic as Aldo, the heir of a noble family. He begins a new life alongside his twin brother Elphas and his loving parents. However, haunted by the fear of losing those he loves once again, Aldo starts to shut his heart off from his family. But when the roar of a ferocious magical beast threatens to devour them, the boy rises to his feet— determined this time to protect what he once lost in his previous life. A story of redemption and a second chance at heroism begins!

Da-in, ended up possessing the villain of a story.

To make Stardust — the story's protagonist and his favorite character in a dystopian manga — happy, he resolves to become the villain Egoistic for her growth.

Da-in deliberately causes terror to enhance Stardust's abilities and preemptively prevents all the tragic events from the original story, but in the process, he gains public support while also drawing Stardust's suspicion.

Stardust, who initially opposed him, gradually opens her heart, and soon even begins to show signs of obsession towards him...?

Alban realized he had been reincarnated as the villainous noble in a certain novel. Just as he began training in swordsmanship and magic to avoid defeat by the protagonist, he learned that Leticia, a noblewoman surrounded by nasty rumors, was to become his wife! He was nervous about what kind of "evil woman" she might be... but, upon meeting her, he found an incredibly pure girl — angelic, and exactly his type! Alban, forgetting all about avoiding his doom due to her adorableness, resolved to take revenge on the mastermind who had set up his beloved wife! Using their villainous reputation to their advantage, they set out to lure the culprit, but... will they succeed?