When the final bell of the graduation ceremony rang,
and all the cheers, applause, and glory gradually faded into silence,
Hogwarts finally welcomed the true day of farewell for the seventh-years.
Platform Nine and Three-Quarters was as bustling and lively as ever. The air was filled with steam, parting sorrow, and boundless anticipation for the future.
The scarlet Hogwarts Express stood quietly on the tracks like a faithful ferryman, ready to carry yet another generation of young witches and wizards—laden with knowledge and memories—into the vast unknown.
The platform was packed with family members and friends who had come to see them off.
Yet today felt… different.
Almost everyone's gaze, intentionally or not, drifted toward the same spot.
There, Lin Sen was saying his final goodbyes to Hermione, Fleur, Daphne, and the others.
He carried no luggage—still dressed in a simple black robe, as if he were not about to embark on an unknown journey, but merely heading out for a casual stroll after a meal.
"Are you really… not coming back to the Ministry with us first?"
Kingsley Shacklebolt, the newly appointed Minister for Magic, stood nearby, asking for what must have been the tenth time, his voice filled with reluctance and hope.
"There are more important things waiting for you there," Lin Sen replied with a faint smile, shaking his head. "The ship of the new era has already set sail—and you are its finest helmsmen."
"But without you, the 'shipbuilder,' we—"
"The joy of sailing lies in exploring the unknown," Lin Sen interrupted gently. "If I charted the entire course for you, what would be the point?"
Kingsley fell silent.
So did Dumbledore, Sirius, and the others behind him.
They all understood—he could not be kept.
This man's journey had never belonged to this small pond that had finally returned to peace…
…but to the vast ocean beyond, filled with storms and treasures—the sea of stars.
A long whistle echoed across the platform.
It was time to board.
"Well then…" Lin Sen turned to Hermione, Fleur, Daphne, and Luna—the four who would accompany him on this grand journey.
"Ladies, is our first destination ready?"
"Of course!" Fleur's eyes sparkled brilliantly.
Hermione, Daphne, and Luna all smiled as well, their expressions filled with long-awaited excitement.
Under the watchful gazes of everyone on the platform—filled with respect and blessings—
Lin Sen led them onto the scarlet train, a symbol of both farewell and departure.
The train slowly began to move.
Seated by the window, Lin Sen did not turn back to look at those waving goodbye.
Instead, his gaze passed through the glass, beyond the retreating scenery of London's outskirts, and fixed upon the distant horizon—
the towering silhouette of Hogwarts.
That ancient castle.
He had spent seven years there.
He had witnessed the growth of a boy, the fall of a Dark Lord, and the end of an era.
The era of Harry Potter—of courage and destiny.
The era of Voldemort—of fear and ambition.
The era of Albus Dumbledore—of wisdom and guardianship.
And now, as the train departed, all of it faded into the distance like scenery outside the window…
becoming history.
One era had ended.
And another—greater, unknown, and full of infinite possibility—
belonging to Lin Sen…
had only just begun.
A few days later.
In Paris, France, within a luxurious magical estate belonging to the Greengrass family, overlooking the Seine—
Warm sunlight streamed through massive floor-to-ceiling windows, illuminating a soft carpet made from Mooncalf fur.
Lin Sen, Hermione, Fleur, Daphne, and Luna sat together.
At the center floated a massive, enchanted world map, vivid and lifelike.
"Well then, ladies," Lin Sen said, breaking the silence, "now that we've left the cradle, it's time to formally plan the route for our 'graduation journey.'"
At once, all four girls' eyes lit up.
"Our first stop is obviously France!" Fleur declared eagerly, pointing to Paris. "Nicolas Flamel's alchemy laboratory is hidden beneath the city! And my family's ancient Veela bloodline secrets—these will be our starting point!"
"Agreed," Hermione said, adjusting her glasses, intellect shining in her eyes. "After that, I suggest Germany—Nurmengard Castle."
She pointed east.
"It's both Grindelwald's origin and his prison. His research on the Deathly Hallows and lost dark magic has immense academic value."
"After Germany," Daphne added coolly, her tone strategic, "we head south—to Egypt."
Her finger landed firmly on the land of pyramids.
"The curses, soul magic, and afterlife systems there are among the oldest and most dangerous. Essential for expanding our knowledge base."
"And then the United States!" Luna chimed in dreamily, pointing across the ocean. "I've heard there are all sorts of strange magical creatures! Maybe we'll even find a Thunderbird!"
First stop: France — uncover the secrets of immortality.
Second: Germany — touch the legend of the Hallows.
Third: Egypt — decipher the mysteries of the soul.
Fourth: America — track mythical beasts.
A grand roadmap—one that would drive any wizard mad with excitement—took shape through their laughter and discussion.
Lin Sen watched with a smile.
He knew—
His true story…
was only just beginning.
But then, a practical problem arose.
"Traveling the world sounds wonderful," Hermione said seriously, "but what about our luggage? We can't stay in inns everywhere. And my books… our potion equipment… research materials… there's far too much. A simple Undetectable Extension Charm won't be enough."
She was right.
This wasn't a casual trip—it was a mobile, high-level research expedition.
"We also need a secure, private base," Fleur added.
Lin Sen smiled.
"I thought it might be something difficult."
He walked to the storage room and casually picked out ten old, worn brown leather suitcases.
"Lin Sen?" Hermione frowned. "What are those for?"
"Watch."
He placed one suitcase in the center.
Then—
He placed his hand on it.
A deep, incomprehensible wave of spatial magic surged forth.
He wasn't enlarging space—
He was creating a world.
Seconds later, he withdrew his hand.
"It's done," he said with a smile. "Welcome… home."
Home?
The girls exchanged confused glances.
Lin Sen said nothing.
He simply opened the suitcase—
and stepped inside.
Disappearing completely.
After a stunned pause, the girls followed.
And the moment they crossed the threshold—
they froze.
Inside was not a cramped suitcase.
But a vast, magnificent castle hall.
A starry enchanted ceiling.
Soft carpets beneath their feet.
A roaring fireplace.
Elegant sofas and tea tables.
"This… this…" Hermione's mind completely shut down.
"Left side," Lin Sen said calmly, "five bedrooms with private baths. Right side—kitchen and dining hall. Upstairs—a three-level library modeled after Hogwarts. Basement—a top-tier potions lab and a training arena the size of two Quidditch fields."
"And time flows differently here," he added. "One month inside equals ten days outside."
A suitcase…
containing an entire world.
This was no extension charm.
This was creation.
The girls stood there, speechless, beneath the starry ceiling.
Their journey—
was going to be far more incredible than they had ever imagined.
When Lin Sen opened the library doors—
Hermione completely lost the ability to speak.
Before her lay not a room—
but an endless ocean of books.
A vast, three-tiered circular library, grander than Hogwarts itself.
Towering shelves stretched into a glowing, rune-filled sky.
Millions of books rested quietly, radiating the scent of knowledge.
Hermione's eyes widened—
as if she had just found paradise.
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