I'm in a crossover anime world, and I've been transported to Hogwarts twice.

Genichi Hanyu is well aware that he is a sophisticated egoist.

They show compassion when they have surplus.

However, if the existence of the other party threatens or hinders him, Genichi Hanyu will eliminate it without hesitation.

Tanjiro Kamado is like this, and so are everyone else!

84 World Integration, Two Choices

Genichi Hanyu set off on the path leading to the Kamado family's house.

He looked up and saw wisps of smoke rising from the chimneys in the distance, heading straight towards the direction of the stove.

"It should be right here."

He straightened his collar, stepped forward, and then knocked on the door.

Tanjiro Kamado quickly opened the door and came out.

"It's you!"

"It's me. I've come to thank you for your help last time."

Genichi Hanyu then went straight to the point without any formalities.

"Tanjiro Kamado, come and work for me."

Yuzuru extended the invitation directly, looking straight into the boy's eyes.

"May I ask why you invited me?"

Genichi Hanyu's reply was unusually clear: "In order to save more people, I have a reason to invite you, but if..."

He paused, then continued, "If you refuse me, then I will have no choice but to kill you, even if I don't want to do it, but I have no other option!"

Surprisingly, Tanjiro Kamado's tense expression suddenly relaxed, and he even smiled.

"There's no trace of lying."

"So, what do you want me to do for you?"

"It's probably about saving humanity and making humanity more prosperous."

Genichi Hanyu deliberately spoke vaguely.

Although Tanjiro Kamado didn't quite understand, his keen sense of smell told him that the person in front of him was not a villain.

He glanced back into the room, seemingly making up his mind: "I agree to work for you!"

[World Conquest Progress: 97%]

Genichi Hanyu secretly breathed a sigh of relief, but on the surface he remained calm: "And your sister Nezuko Kamado, I also need her to work for me, of course, salary is negotiable."

"no problem."

Tanjiro Kamado readily agreed and turned to call into the house, "Nezuko, come out for a second!"

The door to the house was pushed open, and Nezuko Kamado came out. Tanjiro Kamado stepped forward to explain.

"Your brother should have told you about this matter, so what's your own opinion?"

Genichi Hanyu stared at Nezuko.

The girl nodded in agreement.

[World Conquest Progress: 98%]

Genichi Hanyu finally showed a genuine smile: "Very good."

Genichi Hanyu took out a brocade pouch from his pocket and handed it to Tanjiro Kamado. "This is a deposit for you. After that, make arrangements for your families, and then please leave with me."

Tanjiro Kamado took the brocade pouch; it was heavy and filled with gold coins.

He looked up in surprise: "This...this is too much!"

"You are worth the price."

"However, you and your sister will have to separate from your family for the time being. Of course, we will allow you to live together as a family in the future, but there are some things that you need to do now."

When Genichi Hanyu arrived at the Demon Slayer Corps headquarters with Tanjiro Kamado and his sister, Kagaya Ubuyashiki was already waiting in the courtyard.

The curse marks on the young master's body had completely disappeared, and his pale face had regained some color.

"Mr. Hanyu."

Kagaya Ubuyashiki bowed respectfully: "Thank you for lifting the thousand-year curse on our clan."

Genichi Hanyu handed the video recording of Muzan Kibutsuji's final moments to Kagaya Ubuyashiki and then said, "I'd appreciate it if you could take care of these two children, and also make arrangements for their families."

"Please leave it to me."

Kagaya Ubuyashiki solemnly accepted the video recording, looking gently at Tanjiro Kamado and his sister, "We will take care of them like family."

Yuzuru nodded and added, "I also need you to find two more people for me."

He described the characteristics of Zenitsu Agatsuma and Inosuke Hashibira.

Kagaya Ubuyashiki smiled slightly: "The two people you mentioned match the two in the Demon Slayer Corps. I'll have them brought over now."

While waiting, Genichi Hanyu stood under the cherry blossom tree in the courtyard, gazing absently at the falling petals.

Tanjiro Kamado walked up to him, but hesitated to speak.

"Ask me any questions you may have."

Genichi Hanyu did not turn around.

"Who exactly are you? And why are you doing these things?"

Genichi Hanyu chuckled softly: "This is a complicated question. Simply put, I'm helping my world become stronger, and incidentally..."

He turned to Tanjiro Kamado, "To save your world."

Before Tanjiro Kamado could press for more information, a commotion erupted from the other side of the courtyard.

"I don't want to meet any strangers!"

Zenitsu Agatsuma was dragged over crying, while Inosuke Hashibira charged ahead, yelling, "Who wants to see me? Come and fight!"

As Genichi Hanyu looked at these two clowns, the corners of his mouth involuntarily turned up.

Subduing them was surprisingly easy.

He promised Zenitsu that he would protect those he cared about, while he directly challenged Inosuke to a duel and defeated him.

[World Conquest Progress: 100%]

The moment the progress bar reached its maximum, Gaia's voice echoed in Genichi Hanyu's mind, and two choices appeared before his eyes:

Directly destroy the Demon Slayer world and transform it into pure world origin.

Alternatively, the Demon Slayer world could be integrated into a crossover anime world, preserving all life.

The first option is simple and straightforward, maximizing the energy of the crossover world, but you'll have to slowly rebuild and create it yourself afterwards.

The second option is much more complicated. There are many problems with world fusion, but the advantage is that the people of the Demon Slayer world can survive, and Gaia doesn't need to build and create bit by bit. She can simply move the territory of the Demon Slayer world to her own world.

Genichi Hanyu did not hesitate for long.

He watched Tanjiro talking to Nezuko, Zenitsu and Inosuke playing around, and the cherry blossoms blooming in the courtyard.

"I choose the second option."

His decision caused a slight tremor throughout the world.

A golden crack appeared in the sky and slowly widened.

But ordinary people couldn't see this strange phenomenon; only Tanjiro Kamado and others looked up in confusion.

"here we go."

"It's a soft voice," said Genichi Hanyu.

He sensed that the two worlds were slowly merging, a process that could take weeks.

During this period, he needs to ensure a smooth transition between the two worlds.

"Mr. Hanyu?"

Kagaya Ubuyashiki walked over with a worried expression.

"Did something happen?"

"no need to worry."

Genichi Hanyu reassured her, "These are just some necessary changes. During this time, I ask that you help maintain order within the Demon Slayer Corps."

After leaving the Demon Slayer Corps headquarters, Genichi Hanyu immediately contacted Tsurugi: "The world is about to merge. If you're interested, you can observe it."

He Xi's voice came through the communicator, filled with obvious excitement: "We've finally waited for this day. Don't worry, I'll keep a close eye on things."

Yuzuru Hanyu shut down his communications and stood on high ground, overlooking the land that was about to become part of the anime and manga world.

In the distance, Tanjiro Kamado is showing his sister around the headquarters; Zenitsu is chasing butterflies across the grass; and Inosuke Hashibira is sweating profusely in the training field.

These vibrant lives will all become part of the new world.

My philandering boyfriend and the Queen of Slytherin (born in 85)

Since Genichi Hanyu no longer needed to concern himself with what happened afterward, he no longer needed to stay in the Demon Slayer world.

With a slight thought, he was transported back to the familiar and magical world of Harry Potter!

That's right. Even if he is in another world, he can instantly cross over to the Harry Potter world as long as he has the will.

This ability was as natural to him as breathing.

At this moment, deep underground in Hogwarts Castle, the fireplace in the Slytherin prefects' private common room crackled softly.

The flickering flames cast dappled shadows on the dark green tapestry and silver snake decorations, while the air was filled with the scent of ancient stone walls steeped in time and a faint aroma of magical herbs.

Genichi Hanyu was holding Cassandra Worre tightly in his arms, burying his face in her velvety golden hair, greedily inhaling her unique, cool fragrance, which seemed to soothe the invisible weariness he had accumulated over the past few days.

"call!"

He let out a satisfied sigh, his voice carrying a hint of laziness and smugness.

"Cassandra's energy has been replenished. Cassandra is truly amazing!"

The girl in his arms stiffened slightly, and then her fair cheeks blushed beautifully at a visible speed.

She suddenly raised her head, her beautiful eyes filled with shame and anger, and glared fiercely at this shameless guy, biting her lower lip with her teeth.

"You guy!"

There was a barely perceptible tremor in the voice.

Cassandra felt a bittersweet helplessness towards her boyfriend, who always managed to easily tug at her heartstrings and whose skin was as thick as a city wall. She could only express her anger in vain.

Genichi Hanyu, however, paid no attention to her glare. Instead, he chuckled and tightened his arms, holding her even more firmly in his embrace.

With a swift, horizontal lift, he scooped Cassandra up in his arms and carried her a few steps to the large sofa in the center of the lounge, its cushions a deep dark green velvet. There, he sat down gracefully.

As for Cassandra, he held her firmly on his lap, in a position so intimate that she couldn't escape.

The girl struggled symbolically for a moment, but when she felt the firm strength from his arm, she gave up and leaned against him with her body slightly stiff.

"Alright, let me hold you like this for now."

Genichi Hanyu gently brushed his chin against the top of her soft hair, his voice low and soothing.

"Tell me about what happened to you while I was away."

The warm breath brushed against her earlobe, bringing a slight tickle.

Cassandra tilted her head slightly, creating a small distance so she could see his eyes clearly, before softly asking, "And you? What did you experience in the other world?"

Her eyes held curiosity, but also a hint of barely perceptible worry.

She had been worried ever since Genichi Hanyu said he wanted to conquer other worlds.

Genichi Hanyu adjusted her posture to make her more comfortable, and then slowly began to tell Cassandra about his experiences in the world of Demon Slayer, as if he were telling a story.

Genichi Hanyu depicted the brutal battlefield filled with blood and the fragrance of wisteria, and told the story of the swordsmen who wielded Nichirin Blades and fought to the death against demons.

Of course, Genichi Hanyu didn't hide anything. He looked directly into Cassandra's eyes and frankly told her about the three angel queens, Keisha, He Xi, and Liang Bing.

Genichi Hanyu described their near-perfect appearances, extraordinary intelligence, and the complex and subtle relationship between them.