Izumi found himself agreeing with Gid's proposal almost immediately.
Technically, they could simply wait for Deviluke's universe to merge naturally into this world over time…
But judging from the king's expression, Gid clearly had no intention of waiting that long.
And honestly?
Izumi did not mind using a World Fusion Card at all.
The moment Gid heard him agree, the king's eyes lit up.
"Hurry and bring it out!"
"Merge my world already!"
"Once that's done, this old man can finally go traveling!"
The former ruler of the galaxy looked genuinely impatient.
Seeing that reaction, Izumi could not help twitching at the corner of his mouth.
Still, he said nothing.
With a casual flip of his hand, a special card appeared between his fingers before he handed it over.
"Go back to your world and crush this."
"The moment it breaks, your universe will begin merging with mine."
Gid did not hesitate for even a second.
The instant he received the card, he tossed it straight toward Sastin.
"Go."
"Handle it."
Sastin immediately looked exhausted.
Their king truly could not wait to retire.
Still, he had nothing to object to.
In theory, the entire universe belonged to Gid anyway.
And now the king was handing that universe over to his future son-in-law.
Honestly… there was nothing strange about that.
After receiving the card, Sastin vanished on the spot.
Back in the Deviluke Universe, he crushed the card without hesitation.
Meanwhile, the moment Sastin departed, Izumi began guiding his "cheap father-in-law" around the Dimensional City.
World fusion required time.
There was no need to rush.
As Gid wandered through the city, everything around him filled him with curiosity.
Especially the battle district.
Watching countless powerful beings fight each other openly immediately piqued his interest.
Without another word, he grabbed his wife and charged straight in to challenge people.
Leaving Izumi standing there speechless.
Lala, meanwhile, looked completely unsurprised.
She happily clung to Izumi's arm.
"Come on, Izumi-kun~"
"Let's head back already!"
Hearing that, Izumi nodded.
He did not refuse.
Taking the three Deviluke sisters with him, he returned directly to the Sephiroth Tree.
By now, Lala completely treated Izumi as her man.
There was no hesitation.
No awkwardness.
In fact, she was even trying to drag her younger sisters into the relationship as well.
As for Izumi—
He thought that sounded great.
...
Some time later, the Deviluke Universe finally finished merging.
The instant the process completed, Izumi immediately began making large-scale adjustments to the world itself.
His universe had become far too massive.
And if things continued like this, the sheer scale would eventually become inconvenient.
Sure, there were teleportation devices and dimensional gates that allowed travel anywhere instantly…
But as more and more worlds merged together, managing everything would become increasingly troublesome.
After thinking for a while, Izumi made a decision.
He restructured the entire world into multiple layers.
The lowest layer would house ordinary slice-of-life worlds.
The second layer would contain worlds with minor supernatural combat power.
Above that came progressively stronger realms.
The second-highest layer became home to high-tier universes such as:
- Type-Moon
- Honkai
- No Game No Life
And at the very top—
Was the realm where Izumi himself resided.
Meanwhile, the Dimensional City remained positioned at the center between all layers.
Every layer possessed pathways leading upward and downward.
Other than Izumi's personal domain, anyone could travel freely between layers as long as they paid the required fee.
Combat laws remained governed through game-based systems.
Besides the battle district inside the Dimensional City, Izumi also designated the second-highest layer—the one containing powerful worlds like No Game No Life—as a free combat zone.
Ordinary civilians were relocated elsewhere.
Once everything was finished, Izumi clapped his hands lightly.
"Well then…"
"Next comes outer space."
A smile slowly spread across his face.
An overwhelming power erupted from his body.
Izumi directly fused together several planets that had arrived from the Deviluke Universe.
Then he reorganized them into a single massive celestial body for extraterrestrial races to inhabit.
At the same time, he constructed a new dimensional route connecting it to the main world.
Finally—
He positioned the enormous planet as a satellite orbiting his universe.
When night arrived, countless people across every layer looked up in astonishment.
There was now a second moon in the sky.
A gigantic planet floated overhead.
It was so close and massive that its surface could be seen clearly with the naked eye.
The sight was fantastical beyond belief.
No matter which layer one stood upon, the enormous alien world remained visible overhead.
Inside that planet, combat was still prohibited.
All laws had been rewritten.
Even mortal enemies could only settle disputes through specially designated systems and rules.
After completing everything, Izumi exhaled in satisfaction.
"This feels much better."
"Our world is becoming more and more perfect."
"What do you think, Momo?"
Momo sat quietly beside him.
As she gazed at the colossal planet hanging in the heavens, excitement filled her eyes.
"Izumi-sama is amazing…"
"This world really is becoming more dreamlike."
Izumi chuckled softly before standing up.
Looking toward the giant planet, he spoke calmly.
"From now on, that world will become our technological planet."
"There are still many things that need proper planning."
"As more worlds continue merging…"
"We'll need to prepare accordingly."
At this point, Izumi had essentially modeled the structure of his universe after the layered system of the world from Problem Children Are Coming from Another World, Aren't They?.
But his world was vastly larger.
As more universes fused together, its total area continued expanding endlessly.
That was why he had begun creating additional celestial bodies.
And honestly?
Just imagining it felt incredible.
A gigantic world surrounded by multiple moons and planets—
All clearly visible in the sky overhead.
The sheer fantasy of it all was breathtaking.
And unlike normal universes, Izumi did not need to care about gravity, orbital mechanics, or any of those troublesome scientific limitations.
Within his domain—
Such things simply were not problems.
Countless newcomers stared at the enormous planet in amazement.
Such scenery could not be found in ordinary worlds.
Well…
The world of No Game No Life used to have similar sights.
But after merging into Izumi's universe, even that had changed.
Now that such a scene appeared once more, how could people not be astonished?
After admiring the spectacular view for a while, Momo suddenly turned toward Izumi curiously.
"Izumi-sama."
"What are you planning to do next?"
"Honestly, staying here all day is getting kind of boring~"
Her older sister Lala spent all her time in laboratories.
Nana had run off into the wilds to play with magical beasts.
Only Momo remained by Izumi's side without much to do.
And now—
She wanted to find something interesting for herself as well.