Oh great hero! The evil Demon Lord has once again arisen to terrorise our lands, and we have summoned you to save our people! No, we don't want you to fight the demon lord! Of course not; we're the good guys! What sort of good guys kidnap people from other worlds and force them to take part in wars that have nothing to do with them? That would just be plain evil! We'd be no better than the demons!

Arc was an ordinary young woman from Earth when she was summoned to an icy hell where she fought for her survival in the name of training to become a hero. Now, after defeating the Overlord itself and achieving the status of hero, she leaves with the goal of enjoying her freedom. She arrives at Arlas, a fantasy world with magic and monsters, a world with numbers, tiers, and classes, a world governed by the System that summoned her.

Ten years ago, Amelia woke up alone and lost in a broken world where she had to fight for her survival. Now, after reaching the pinnacle of power, defeating the Void itself, and escaping the abyss, she has finally found her way back into the real world. But instead of returning to Earth, she arrives in the land of Vacuos. A fantasy world with magic, monsters, Classes, and Levels. A world that is governed by a System like it were a video game.

They asked Amber to become a magical girl three times. She refused. That only made her more interesting. The fourth time, she asked them.

Quinn can barely handle her own life. When the Library of Everywhere discovers her compatible magical signature, suddenly, she is the sole existing potential librarian. Now, it's not only the weight of her world on her shoulders—Quinn must connect with the library system before the universe itself disintegrates. Once she's settled, it should be quiet, peaceful work—just as soon as she battles a few engorged bookworms, repairs hundreds of years of damage, and figures out why there's been no librarian for the last several centuries.

The usual result of a human taking a runaway semitruck head-on is a very sudden, very fast track to the pearly gates. But for one newly noncorporeal man, there's another option: become a dungeon. Feeling sorry for the desperate angel assigned to him, the man relents. Heck, if it doesn't work out, he can always chat with Saint Peter about it later. Next thing you know, he's a dungeon. Admittedly, a small run-down, somewhat unimpressive dungeon (more of a house, actually), but you gotta start somewhere, right?

If waking up in a new world isn't bad enough, Hestia starts her new life as a small, newborn dragon in a hostile forest filled with vicious monsters. With status screens obscuring her vision, her first task is to escape two hungry kobolds wanting some grilled lizard for breakfast. Equipped with fragmented memories from her past life and the gamelike mechanics of her new reality, Hestia must face trials, beasts, bosses, and more as she grows in size and power.

The Netherworld: it is a hellish landscape inhabited only by demons. Joining the ranks of newborn demons, Salvos is thrown into the violent, anarchy-ruled landscape of that world. To survive, she will have to learn, she will have to adapt, and she will have to evolve. She will gain experience to reach new Levels of power. Her curiosity aids her but her pride could be her fall. It is the nature of the Netherworld to avoid or conquer any threats faced. After all, the law of evolution is survival of the fittest, and Salvos is a survivor.

She wanted to be a Necromancer, but awakened as a Saint! Somehow her summoned heroes are all undead? How will the church react when their Saintess summons a skeleton in place of a mighty hero? Sofia isn’t too keen on finding out. In this world, Gods choose [Saints], and [Saints] summon [Heroes] from other worlds; everyone knows that. But Sofia had a thing for bones ever since she was a child; there’s only one [Class] she wants: [Necromancer]! When, by the whims of fate, she gets both classes at the same time, the system breaks.

After the collapse of the known world, Rowan Wilder opened his eyes and found himself on the first floor of the Tower. With a flawless memory and a mere eight cards to his name, he must venture out and prepare himself for the coming calamity.