Deep within the most infamous dungeon, the 'Primordial Core', lives the worst boss monster of all time. Its the story of the struggle of a boss monster who just wants to rest.

He was suddenly summoned to another world one day.
Monsters poured out, a huge disaster incoming.
His ability the lowest.

[Player's level is low]
[Your level is hopeless]

It doesn't matter whether you're the chosen warrior, a talented wizard,
or someone who travelled back in time.
One must do everything they can,

in order to survive.

The Regressor's Instruction Manual.

"It doesn't matter if I'm trash." Is there anyone who wouldn't do anything they could to survive?

Young Woo Shin, Username: Grid.
In the words best virtual reality game <SATISFY>, bad luck always revolves around him.
But he stumbled across a job during a quest, the strongest legendary job out of over 2 billion players!

Combining reality with a gaming world where ferocious beasts roam freely, filled with numerous mysteries and dungeons. In order to defend against the onslaught of these beasts, everyone undergoes class transfers and crazily levels up. On the day of his transfer, Lu Fan becomes a hidden class – Dragon Tamer. However, due to the immense strength of dragons, it is deemed impossible for anyone to tame them, earning Dragon Tamer the reputation of being the most useless class. Fortunately, he awakens the Super Treasure Map System. As Lu Fan, with his mighty dragon, sweeps through everything, the entire world trembles.

Lokan was the ‘King of Violence’ who reigned as the strongest in the virtual reality game, ‘The Lord’. Unfortunately, the assassination order issued by an enemy guild caused him to lose everything. To his surprise, the next time he woke up, he had returned back to three years ago!

“Fucking brats, just you wait. I’ll devour you all!”

A new story begins as Rokan, who travelled back in time, climbs his way back to the top!

The holy land of the Demonic Path, the ten Demonic Sects. When they combined their strength, the world came to call them Demon Palace. And now, in the holy land of all the world’s demons, a Heavenly Demon awakens, ready to devour the martial world..

He’s in the deepest part of the Jianghu. Keep your eyes wide open if you do not wish to get dragged into the abyss.

I killed the player.

He was a real son of a bitch…

He loved me too much and was a sociopath.

Now that I'm back in time, I'll kill him before being manipulated again and save the harem's girls who will help me win the video game's scenario!

This battle fantasy manga follows several heroines who protect people from the monsters that appear through a gate connecting to an alternate world known as the Mato (magic capital).

People called “challengers” are gambling their life trying to escape from The 100 Story Tower to win 10 billion yen. But what will happen when Tatsuki Kuroumi awakes at this tower without remembering anything about his prior life, including entering the tower as challenger?

He was just an ordinary guy running a small restaurant. But behind that quiet life he was actually a legendary veteran who spent thousands of hours in a hardcore zombie-survival VR game.

Then one day, the world he knew turned upside down. The game he mastered… dying and respawning endlessly… suddenly became real.

A zombie apocalypse breaks out without warning. At that moment, he awakens a strange power: the ability to open dimensional gates.

Now he moves between this world and another, preparing for the coming collapse.

Soon, familiar faces from his gaming past begin to appear… the endlessly respawning Bunny Princess, Duck-Butt Quack-Quack who commands monsters, and other unbelievable players start “logging in” to reality.

The world is falling apart. Humanity blurs with pure survival instinct. But he stands firm: “This isn’t a game… but I know this battlefield.”

What choice will the strongest former players make when everything reaches the end?

Witches suddenly declare war against humans, causing two-thirds of the world to fall apart.
They summon monsters called "Supporters" and devastate human residences but why?
Survivors gather people with the power to combat the witches and called them Witch Hunters! Tasha Godspell is one of the strongest nicknamed "The Marksman" along with his "Jack-O-Lantern" looking Supporter. He fights the witches but cannot really bring himself to hate them.

The worst talent that no one can compete with.
Unstoppable Demon God, Dan Uhyeon.
A thousand years after being sealed for the misdeed.
A thousand years was enough to get rid of Dan Uhyeon’s sense of superiority.
A world that has changed, solitude with no one knows, and the only thing left is despondency and emptiness.
“Time goes like the wind. There’s really nothing left.”
A little girl who appeared in front of Dan Uhyeon lost her purpose and will to live aimlessly. Hwa Somi.
For a girl who seems to have nowhere to lean on, Dan Uhyeon feels the same and gradually begins to open the door of his mind.
“I’m Dan Uhyeon. Come with me.”
The story of a warrior with an icy heart and acute and pure girl
The story of an unusual family’s life in the midfield will warm your heart.

One day at school, Youta Tada sees someone strange entering school. Out of nowhere this being appears next to him and makes him fall from the third floor! But before he hits the ground, he wakes up in a strange world where beings like dragons exist! Youta then meets a young paladin named Lumi and discovers that he is the only man on the entire planet, and also that its inhabitants are extremely 'weak' to his presence or more specifically, his touch. Would this be a paradise?

“You good-for-nothing bastard. You are the son of a Sword Saint, yet you dare pull such a defective Class!?”

During the〈Divine Blessing Ceremony〉of the 15-year-old Elma who came from a lineage of Sword Saints, he had manifested a commonly deemed defective class known as the Heavy Knight. He had been deprived of his position as the next head of the Edvan Household and was then exiled. The Heavy Knight class had an unbalanced status and useless skills, to top it off, it was even said to be a class cowardly and indolent people have.
But, Elma knew better—that this world was the world of the game he had used to play before—and that the Heavy Knight class was the strongest class to exist. Elma made full use of the knowledge he had in his previous life and began his efficient walkthrough of the world he was reincarnated into.

A super-class dragoon group-Cyril, a boy who was banished from the S-class guild "Lindworm" for some reason. What he had hidden was ... the ability to "talk" with the dragons, which was unconventional!
Cyril who met unique dragons and launched his own guild. Perhaps because of its extraordinary qualities, the level of the guild soars at the fastest rate in history! Cyril, whose arm was recognized, will make a name for himself as a non-standard dragon knight.

If you become a hero and defeat the Demon King, a life of idleness awaits you...! This is what the young man Jirei believed, and he worked hard day and night to achieve his goal. However, when he found out that the heroes who defeated the Demon King were the ones who were doing all the hard work, he ran away. But the girls that Jirei had been saving on his journeys before he knew it came pouring in one after another to win his heart and body...?

To fulfill his childhood promise, the boy aims at the top of the magical world with his sword in hand. There is only one way for him, who has no magical power, to reach the supreme peak…

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/

By the will of the goddess, Itsuki Shinomiya was given the privilege of choosing various abilities and being reborn in another world.
However, before going to the other world, he didn't want to involve himself in scary, dirty, gross things like battles.
Fiercely determined to live a slow life, he chose the unique skill [Pocket Money], giving him an amount of money once per day.
"With this, I can hang out with girls without having to work!"
Dreaming of avoiding battles and living with cute girls, Itsuki stepped into the other world!
But the reality was not that simple.
Getting attacked by giant bugs, getting caught up in arguments at the guild, and getting stuck with slaves?!
In the end, will Itsuki be able to live his ideal slow life?!
Using unique skills and manufacturing skills, an exciting other-world slow life with beautiful girls starts now!