— — — — — —
Five hundred years in the past — Inu-Yokai territory.
Lynn appeared at Senhime's palace.
"You did it," Grayfia said softly, watching him.
"Yup," Lynn replied, his tone warm but steady. "The Underworld war is over. And I gave the best assist. I can be called the MVP of that war, right?"
Grayfia looked up at him—calm, resolute.
"I'm ready to join your so-called Familia," she said.
Lynn raised a brow. "You sure?"
Grayfia just smiled, "I promised you!"
Next, Lynn explained what the Familia was—and what his Devil Pieces could do. He spoke of ranking and the powers they granted. How the pieces formed bonds deeper than contracts, and how those bonds would shape the future. And of course, he is from 500 years in the future.
"Wait—I have an idea."
Grayfia looked at him with that calculating, determined gaze of hers.
"These Devil Pieces you've created... if we distribute a weaker, ordinary version of them to the other devils, we could keep the underworld under the familia's control and even secure their loyalty early. After 500 years from now, they'll already be under your rule—whether they realize it or not."
Lynn's eyes narrowed thoughtfully, then a small smile tugged at his lips. "That's... a good idea."
He opened his system panel, fingers flicking through options as glowing sigils shifted and rearranged.
"I'll recreate the Devil Piece Ranking— many versions for this era."
Now came the question—who should he entrust this power to?
He considered several candidates but none felt right.
Then, as if reading his thoughts, Grayfia stepped forward.
"I'll do it."
Lynn blinked, looking up at her.
"I want to be the one who spreads them," she said. "If this plan is going to work… I need to be the one to make sure it does."
"..."
"You don't have to stay here, Grayfia. Come back with me. I can give this task to someone else. You've already done enough."
She shook her head slowly, her voice unwavering.
"No. I need to make sure this plan succeeds. If we set the foundation now, we can prevent countless future wars and battles. We can build a true peace. And when the time comes—when five centuries have passed—I'll be there at your side, with every devil already bearing your mark. All of them, yours."
Lynn stared at her for a long moment, then let out a breath—a soft, peaceful sigh. "…All right."
"Then take this," he said quietly.
He raised his hand. A single, gleaming piece formed in the air—the Queen Devil Piece.
Unlike the others, it radiated a deeper power, its glow steady, like a heartbeat.
[Queen Piece — Unique: 1/1]
[Effect: Grants wielder full authority over all Devil Pieces within Familia. Enables use of all other familia abilities. Admin-level command of Familia ranking.]
"This is the only one. It's yours," Lynn said. "No one else will ever receive a Queen Piece."
"I'll be waiting, Grayfia—my Queen."
"Also," Lynn added, his voice quiet but reassuring, "we can communicate through the Devil Piece. And I'll come to you whenever you summon me. So even though I won't appear in this era again publicly… we'll still meet. Privately."
"Umm..." Grayfia bowed slightly—elegant, unwavering. "Until next time, then."
— — —
Main World – After a Few Months
[Bleach World — 97.22%]
[Date A Live — 93.56%]
[Massive New Worlds Discovered]
[Naruto – One Piece – Marvel – DC – Attack on Titan - Solo Leveling – My Hero Academia – Dragon Ball – Gundam SEED - Akame ga Kill – One Punch Man – Kaiju No. 8 – Re:ZERO - Pokémon – KonoSuba – Harry Potter – Fairy Tail – ....]
Lynn glanced at the panel and gave a satisfied nod.
Over the past few months, he'd acquired a lot of new rules and concepts.
Aizen had done an excellent job in the Bleach world, and with Saeko and the others clearing the Date A Live world—with his help—they'd obtained things like the [Concept of Fire], [Concept of Space], [Concept of Time], [Concept of Distance], and many smaller rules tied to larger principles.
He'd sent Saeko, Gojo, Sukuna, and others to assist in the Date A Live world. Of course, almost all the Familia members wanted to contribute. Everyone was eager to earn EXP and level up, so they were giving it their all.
As a result, both Bleach and Date A Live didn't stand a chance.
Afterward, Lynn decided to activate [Devil World] in the Black Bullet world. Since it met the 100% requirement, the world qualified for fusion. And just like that—poof—it merged with his Devil World.
The process was absurdly smooth: the planet expanded, space stretched, and yet everything stayed perfectly organized. It was like it had always belonged.
He did the same with Highschool of the Dead. Same outcome.
"Oh, it's gonna be fun seeing Aizen's face when I fuse Bleach too… haha, I really wanna see that calm expression crack."
Lynn opened the [Main World] panel.
[Main World: 69.94%]
"Damn, the DxD world is really hard to clear. And apparently, there are more worlds out there than I thought... oh man."
"Well, time to make the familia organized."
...
Lynn had already rebuilt his mountain villa, turning it into the main base of operations for his Familia in the Main World.
His private home—for him and his women—was now located in the Devil World.
There, he created an entire floating island just for his harem. With the new rules under his control, he could literally build anything from nothing—houses, rooms, beds—whatever he imagined became real.
Below, on the ever-expanding surface of the Main World, he constructed gates to every other world he had fused or planned to invade.
Now, anyone in his Familia—whether human, beast, curse, sorcerer, devil, shinigami, hollow, or anything else that joined him—could choose a world, enter it, and clear it for the Familia.
The Devil World automatically calculated each member's contributions and distributed EXP as before.
"Hm… there's nothing left for me to do anymore," Lynn muttered."Any world that appears will be cleared by other Familia members. Even the Main World is slowly being conquered on its own…"
He turned his gaze toward the glowing portals. "The others will arrive soon to sweep the gates…"
---
Naruto
One Piece
Dragon Ball
My Hero Academia + Solo Leveling + One Punch Man
Attack on Titan
Fairy Tail
Kaiju No. 8
Marvel Universe + Harry Potter
DC Universe
Gundam SEED + Code Geass + Evangelion
Re: ZERO
Konosuba + That Time I Got Reincarnated as a Slime
Mushoku Tensei
The Rising of the Shield Hero + Overlord
Fate Series
No Game No Life
Digimon + Pokémon
Akame ga Kill
Hellsing + Tokyo Ghoul + Parasyte
Mashup of—
.....
.....
...
Looking at the long, unending list of worlds, Lynn smiled. Then, without hesitation, he chose one of the gates and stepped through it.
The moment he entered, the gate sealed behind him—preventing any other Familia members from following.
A new journey had begun.
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---
✍️ Little Notes From Coreal
So, just a little background on this fanfic—
It was actually dropped at Chapter 291, with the last update on April 23rd.
The author stopped posting after getting a flood of insults and curses—literally getting flamed every minute. From what I can tell, he either quit writing altogether or abandoned his account to start fresh somewhere else.
The weird part? Honestly, the hate was kind of earned.
To give you an idea: I was fusing 3 to 4 chapters into one and cutting all the filler. The Espada fight alone lasted from Chapter 241 to 291—that's 50 chapters of basically one battle. And back then, the author was updating daily, so readers would've had to endure that arc for nearly two months straight.
Can you even imagine?
Anyway, I merged chapters and cleaned things up so you wouldn't have to suffer through that mess.
Chapter 291 ended with Lynn finally appearing and was about to fight Super Devil Aizen—and from the direction it was going, it seemed like he planned to kill Aizen and the other males, then recruit the females into his Familia.
So, I picked things up from there and added my own ideas to continue the story.
Yeah, the writing may not be top-tier, but I was mainly focused on wrapping things up and getting an end. So apologies if it was rushed.
Got any suggestions or think I messed something up? Let me know—I'm open to feedback!
Well… that's the end of this journey.
Or maybe—the beginning of a new one.
How? By checking my other fanfics, of course.
Goodbye~
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