In the year 1340 of the Shire Reckoning, one year before the departure of the Lonely Mountain expedition, the Grey Wizard had yet to visit the Shire, the Dwarf King was still forging weapons in the Blue Mountains, and the dragon still slept deep within the mountain…

In that very year, a young wizard unexpectedly crossed into Middle-earth, carrying the Hogwarts Sign-in System.

Overnight, Hogwarts Castle rose from the ground, standing tall and majestic on the lands of Middle-earth; flying broomsticks streaked across the skies, becoming a unique sight in this world.

In the wild lands, the legend of a black-robed wizard began to spread silently.

He was a friend of the Elves, a bane to the Orcs, a nightmare to the Trolls, and the lifelong nemesis of the Dark Lord Sauron.

Years later, when the Dark Lord was defeated, the Elves sailed West, and the Age of Men began—Duir, who had signed in at all corners of Middle-earth, looked toward the fabled lands in the West.

[Location: Aman. Would you like to sign in?]

In the shadow of the green lantern, Carl tapped Voldemort's diary with a hook stained with evil despair.

"Poor lonely ghost, you are mine, come out and play, how are we going to carry out this pleasant torture?"

On the day when the owl delivered the Hogwarts admission letter, Carl was excited, but also glad that he did not choose "Harry Potter" when he copied books to make money. He was just one step away from biting into the special melon of Avada. After Professor McGonagall arrived, Carl discovered his talent (external plug-in): "Detect Minerva McGonagall, Animagus Transformation... Match Nidalee, Vastaya Xayah Transformation..."

It is understandable that they can transform into a cat, but why did Professor Snape match Viego? "Forever lost my love! Defeat with a single glance!

Soar into the sky with the giant dragon of the Black Forest;

learn the fairy magic in the Fairy Garden;

meet the goddess of luck at the Fountain of Good Fortune with the brave;

combine the three holy relics into one in the face of the god of death;

in a world where wizards exist, are fairy tales the fantasy of genius or embellished history?

Through the mist of history, across the boundary between this world and the next.

Avalon, please show the truth of the world to the wanderers.

…………

"My dream used to be to become a best-selling fairy tale writer in the Muggle and wizard worlds."

The reporter from the Daily Prophet raised the microphone, "What about now?"

"I have written my life into a fairy tale that I am most satisfied with... Look, whether it is Muggles or wizards, is there anyone who can refuse my story?"

He was at Hogwarts, and had just become a Half-Blood Prince.

[Parent-generation; multiple female protagonists; no system]

…

In 1976, 16-year-old Severus Snape welcomed a new life.

That year, Voldemort had not yet split his soul into seven pieces.

That year, Nagini was still hiding in the forests of Albania.

That year, Pandora was still doing wonderful experiments at Hogwarts.

That year, Ms. Rosmerta was in her prime and very graceful.

That year, Snape decided to experience this wonderful world.

"Hello, respected Miss Janna Roland, what do you think of the fact that you have been awarded the title of "Most Charming Witch" by Wizard Weekly for three consecutive years?" "

Actually, compared to this title, I prefer other wizards to call me."

"You are not talking about: the master of life, the ruler of the summoning law, the best friend of the spirit world, the guardian of the four seasons, the soul singer..."

"None of them."

"I prefer others to call me-a learned wizard."

Ciel traveled through the magic world and became a distant relative of Professor Sprout. He was also tied to the planting system - planting plants can get rewards.

"Plant ten Devil's Snares and get 10 fragments of Binding Curse Enlightenment. Your Binding Curse has been upgraded to the legendary level."

"Plant ten Biting Cabbages and get 10 fragments of Sharp Spell Enlightenment. Your Sharp Spell's killing power has been greatly improved."

So Hogwarts has a diligent and thoughtful little wizard who is dedicated to planting trees.

Three-headed dog? Philosopher's Stone? Nothing to do with me.

Basilisk? The heir of Slytherin? Stay out of it.

Triwizard Tournament? Cedric died? That's a pity, plant a tree to commemorate him.

“..."

"What? You said the Death Eaters dug up my vegetable patch and trampled my saplings?"

...

First, Dumbledore knew that Gilderoy Lockhart was a fake.

Secondly, Lockhart also knew that Lockhart was a fake because he traveled through time and space and became Lockhart.

The problem now is that Dumbledore plans to invite him to Hogwarts as a negative example, while Lockhart, a fake who can't even perform the simplest magic, just wants to lie down and enjoy the wealth accumulated by his original body.

But in the end, Lockhart still went to Hogwarts to serve as a professor of Defense Against the Dark Arts.

Wasn't the magic mansion and the vault full of gold galleons attractive?

Or was it that the achievement of more than a dozen best-selling books that earned him endless royalties was not enough to satisfy him?

Or were Snape and Voldemort, who were obsessed with their own positions, not scary?

No, neither of them. It's because Lockhart was forced to go to school by Dumbledore! So... find a way to make this year's mission...

[Crossing over + becoming a cat + pseudo-antithesis + single CP Hermione + warm daily life]

Original title: "The Secret Black Cat of Hogwarts". The protagonist is not a saint, and the IQ of all the characters is basically online.

The Oriental Black Cat brought mysterious power into Hogwarts. There are so many ghosts in the school, I really want to eat one, the Dementors taste very good, Voldemort is the main meal, there is no escape!

Centaur: The end of the bear, the destroyer of herbs, the nemesis of the eight-eyed giant spider, the ominous darkness...The Mars tonight blinded my eyes.

Draco: He is a true aristocrat! What an elegance!

Simo: shepherd of lost lambs, ferryman of the sea of ​​soul, life mentor, pioneer of art.

Macon: I'm a regular little black cat.

Voldemort: Great! I am beginning to understand everything!

Harry Potter:

[Slytherin][Hermione is the only female protagonist][More rigorous: After living in another world for ten years, the protagonist barely remembers a little about Harry Potter][Not a system]

The false devil:

Gather the Saints to fight against the Muggles.

Occupy Britain and attack the school.

The real devil:

Destroy the world and cause great suffering to all living beings.

Elias traveled through time for eleven years and suddenly found out that he had traveled to the world of Harry Potter and was chosen by the bloodline of the devil!

You only need to gather three of the seven deadly sins: pride, wrath, laziness, greed, envy, gluttony, and ecstasy, and the power of the devil in your blood will automatically summon the devil to possess you and destroy the world!

For the peace of the world,

From that day on, Elias knew that his idle life would be gone forever...

If Dumbledore had not defeated Grindelwald.

If the war between wizards and Muggles really broke out.

If the finger witch that the faded one failed to meet was reborn in the body of an 11-year-old wizard girl.

My name is Hermione Granger, and I will rebuild the magic circle of this broken world.

(Contains secondary settings, rational discussion)