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The Boy Who Becomes a Curse

Summary:

Make a scenario where Harry Potter, after giving up on humanity, dies and comes back as a Special Grade curse in the Jujutsu Kaishen universe. Gojo Satoru gets the case to investigate, and instead of getting rid of him, becomes intrigued by Harry's abilities and nonchalant attitude about the world around him

Chapter 1: The Curse Who Remembered

Chapter Text

Harry Potter had spent decades saving people. 

At first, he had believed that was enough.

Defeat the dark wizard.

Break the prophecy.

Survive the war.

Rebuild the Ministry.

Protect children from becoming soldiers.

Make sure no one else grew up inside cupboards, battlefields, or graveyards.

For a while, Harry thought peace was something one could build carefully enough that it would last.

He was wrong.

Peace was fragile.

People were not.

People endured. People adapted. People healed.

Then, somehow, they found new reasons to hate.

Every generation created another tyrant.

Another movement.

Another pure ideology wrapped in pretty words.

Another excuse to hurt someone different.

Harry stopped counting the wars after the fifth.

Stopped attending victory celebrations after the seventh.

Stopped believing apologies when the same families kept funding the same monsters under different names.

He saved the world again.

And again.

And again.

Until the word save began to feel like a curse of its own.

One rainy evening, Harry walked alone through the ruins of an abandoned manor once used by dark wizards. No enemy waited there. No prophecy dragged him forward. No desperate child cried for help.

There was only rain.

There was only stone.

There was only exhaustion.

The manor had been built upon centuries of cruelty. Beneath its collapsed floors, hatred had soaked into the earth until even the air felt bruised. Old rituals, old deaths, old fear—everything lingered.

Then the wards failed.

Not quietly.

Not cleanly.

The old magic collapsed inward, pulling every poisoned memory, every curse, every last fragment of human malice with it.

Harry had time for one thought.

Maybe the world would be quieter without us.

Then everything became dark.


Something opened its eyes beneath the ruins.

It was not a ghost.

Not a spirit.

Not a wizard.

A curse had been born.

But ordinary curses were hunger given shape. Fear given teeth. Hatred with no memory except the wound that made it.

This curse remembered.

It remembered Hogwarts.

Ron laughing with his mouth full.

Hermione’s ink-stained fingers.

Broomsticks.

Snowfall.

Old parchment.

Treacle tart.

The warmth of Hagrid’s coat.

Sirius barking laughter into cold night air.

Every joy.

Every regret.

Every person he had failed.

Every person he had loved.

The hatred that created him should have erased Harry Potter completely.

Instead, Harry Potter became the heart of something no one in the jujutsu world had ever seen.

A curse with grief.

A curse with restraint.

A curse that still knew how to be kind.


They named him the Silent King.

Special Grade.

Threat unknown.

Exorcism priority: immediate.

Harry heard the name once and found it melodramatic.

Still, he did not correct them.

He wandered.

Cities.

Mountains.

Abandoned temples.

Empty shrines.

Places where people had left sorrow behind like offerings.

He did not rampage.

Did not scream.

Did not slaughter.

Sometimes cursed spirits gathered near him, drawn by the weight of his presence.

Low-grade things, malformed and frightened, expecting a king.

They found a quiet man beneath cherry blossoms, feeding birds.

Some stayed.

Some slept.

Harry let them.

He had grown very tired of cages.

He looked almost human, if one did not look too closely.

Tall. Elegant. Black hair drifting as though underwater. Eyes glowing soft emerald in the dusk.

Broken wand fragments orbited behind him like shattered stars.

His robes dissolved constantly into black feathers and green smoke before reforming around him.

When he smiled, it was gentle.

Almost sad.

That was what frightened sorcerers most.


His technique was discovered by accident.

A Grade One sorcerer attacked him outside Kyoto.

Harry did not raise a hand.

The man blinked.

And suddenly he was six years old again, holding his mother’s sleeve on a summer evening. He smelled rice cooking. Heard cicadas. Felt sunlight on his face.

He dropped his weapon.

Harry walked past him without a word.

The report named it Memory Manifestation.

Harry did not attack the body.

He touched the soul where it had once been soft.

Regret.

Love.

Failure.

Hope.

His opponents drowned in themselves.

Some collapsed.

Some wept.

Some simply refused to fight.

Then came his Domain.

Domain Expansion: The Last Great Hall.

An endless castle appeared.

Warm.

Golden.

Alive with laughter.

Every opponent saw the happiest memory of their life waiting for them.

A mother’s embrace.

A friend’s smile.

A childhood room.

A lover calling their name.

Then they realized they could never return.

The domain did not crush flesh.

It crushed certainty.

Most lost the will to continue before Harry ever moved.


Reports spread quickly.

Entire cursed colonies disappeared overnight.

Special-grade curses vanished.

Civilians remained untouched.

Witnesses described a smiling man surrounded by floating feathers.

The higher-ups panicked.

So they sent the strongest sorcerer alive.

Satoru Gojo found Harry sitting beneath a flowering cherry tree.

Around him, low-grade curses slept peacefully like strange, ugly animals.

Gojo stopped.

Lifted his blindfold slightly.

Stared.

“Well,” he said. “That’s new.”

Harry looked up.

“Oh. I was wondering when you’d arrive.”

Gojo grinned. “You know who I am?”

Harry nodded. “You’re very loud.”

For one full second, Satoru Gojo was silent.

Then he laughed.

“I’ve never been insulted that politely.”

Harry returned his gaze to the birds pecking seed from the ground.

“I’ve had practice.”

Gojo activated Infinity.

The air changed.

Harry did not move.

Gojo tilted his head. “You aren’t going to attack?”

“No.”

“Run?”

“No.”

“Monologue?”

Harry looked faintly pained. “I’ve already had one lifetime of those.”

Gojo’s grin widened.

“I like you.”

“That seems unwise.”

“Most fun things are.”


Gojo did not exorcise him.

This was either brilliant or catastrophic.

Possibly both.

He began visiting.

At first, officially.

Then unofficially.

Then whenever he felt like it.

Sometimes they sparred.

Sometimes they drank tea.

Sometimes they sat in complete silence while the world failed to end around them.

Harry always won at chess.

Gojo insisted the board was cursed.

Harry refused to comment.


Yuji Itadori expected a monster.

Instead, he found Harry feeding pigeons outside an abandoned shrine.

Yuji stared.

“Curses feed pigeons?”

Harry tossed another handful of seed. “They’re surprisingly judgmental.”

Yuji slowly sat beside him.

“They are.”

The pigeons immediately judged him too.

Gojo watched from a distance, hands in his pockets.

“How did Harry make Yuji comfortable in five minutes?”

Megumi, beside him, said dryly, “Maybe because he didn’t introduce himself by being annoying.”

Gojo gasped. “My own student.”


Nanami remained suspicious.

“You were born from negative emotions,” he said one afternoon.

Harry nodded. “So were most people.”

Nanami opened his mouth.

Closed it.

Adjusted his glasses.

“That is not as comforting as you seem to think.”

“I wasn’t trying to be comforting.”

“That makes it worse.”

Harry smiled.

Nanami sighed and accepted tea anyway.


Megumi asked the question others avoided.

“If you hate humanity…”

“I don’t,” Harry interrupted.

Megumi looked at him.

Harry watched the clouds drift over Tokyo Jujutsu High.

“I stopped expecting it to improve. There’s a difference.”

Megumi remembered those words for years.


Gojo could not understand him.

Harry should have hated humans.

He did not.

Harry should have enjoyed suffering.

He did not.

Harry should have craved destruction, revenge, worship, fear.

Instead, he repaired abandoned shrines.

Planted flowers in places where people had died.

Read books.

Fed birds.

Watched clouds.

Comforted frightened students with a patience older than death.

Gojo became fascinated.

Not because Harry was dangerous.

Though he was.

Not because Harry was powerful.

Though he was that too.

But because Harry represented something impossible.

A curse born from despair who still chose kindness.


Months later, Gojo asked, “Why didn’t you kill me the first day?”

Harry looked at him over his teacup.

“You smiled.”

Gojo blinked.

“That’s it?”

“It looked genuine.”

Gojo laughed harder than he had in months.

Harry smiled into his tea.


One rainy evening, they sat on a temple roof.

Gojo’s Infinity kept the rain from touching him.

Harry let himself get wet.

For a long time, neither spoke.

Then Gojo asked, quieter than usual, “Do you miss being human?”

Harry watched rain slide from his fingers like silver thread.

“I miss believing tomorrow would be different.”

Silence settled between them.

Not empty.

Not awkward.

Heavy, but shared.

Gojo moved closer.

“What if someone gave you a reason to believe again?”

Harry looked at him for a long time.

“You’d volunteer for something that difficult?”

Gojo shrugged.

“I’ve always liked impossible jobs.”

For the first time since becoming a curse, Harry laughed.

Not politely.

Not bitterly.

Genuinely.

The sound startled the sleeping curses below them awake.

Gojo smiled.

“There it is.”

Harry shook his head.

“You’re insufferable.”

“Yeah,” Gojo said, leaning back on his hands. “But I’m growing on you.”

Harry looked out over the rain-washed city.

Against every instinct, every memory, every century of disappointment, he smiled.

“Unfortunately.”


The jujutsu world never fully accepted Harry.

The higher-ups continued calling him an anomaly.

A threat.

A mistake.

A curse that should not exist.

The students called him Professor Potter.

No one officially hired him.

No one officially allowed him to teach.

Gojo simply brought him to class one day and dared anyone to object.

No one brave enough was present.

Harry taught the students that cursed energy was born from human suffering.

But suffering did not have to decide what someone became.

Pain could become cruelty.

Yes.

But it could also become patience.

Grief could become destruction.

But it could also become understanding.

Fear could become hatred.

But sometimes, if held gently enough, fear became compassion.

Whenever a young sorcerer lost hope, they often found Harry sitting quietly beneath the cherry trees outside Tokyo Jujutsu High.

Eventually, Gojo always appeared with two cups of tea.

He dropped into the seat beside Harry without asking.

Harry never told him to leave.

Neither said much.

They did not need to.

One was the strongest sorcerer in the world.

The other was a curse born from despair who refused to let despair become his only nature.

And somewhere between them, beneath cherry blossoms and rain and all the fragile stubbornness of living things, the line separating humanity from monstrosity grew a little less certain.