The fusion took Izumi two full months.
Only after those two months did he finally complete the integration of the entire Type-Moon world into his own.
At this moment, the world inside his body had expanded countless times over.
The whole Type-Moon universe had become his possession.
Because of that, Izumi himself had grown significantly stronger.
Feeling the change within his body, he couldn't help but smile in satisfaction.
"With this, even if I face the EXE world, I'm completely confident."
Excitement filled his face as he spoke.
Not only that, Alaya and Gaia had also become members of his divine system.
The gains from this trip were nothing short of heaven-defying.
He had not only obtained an entire world but also countless subordinates.
The Heroic Spirits had all become part of his faction.
That alone was extremely satisfying.
Stretching slightly, Izumi stood up.
At this moment, he was the only one left in this empty void.
Gaia and Alaya had already entered his inner world.
Just as he was about to leave, his right hand suddenly emitted a bright light.
The next moment, a white-haired girl in thigh-high socks ran out.
Izumi froze when he saw her.
"Est?!"
It was none other than his Sword Spirit—Est, the girl with rather… unusual preferences.
Est yawned and rubbed her sleepy eyes before looking at him with gem-like pupils.
"Good morning, Master."
"Ahh…"
She let out another long yawn.
Seeing her suddenly appear after such a long time, Izumi felt helpless.
She had finally awakened.
And her strength…
Transcender level.
That was terrifying.
Perhaps it was because of all the attributes he had added to her?
Izumi was puzzled. Why had she awakened at such a high rank?
But he decided not to dwell on it. Instead, he asked curiously,
"Est, why did you only wake up now?"
Est rubbed her eyes and pouted.
"It's because you did strange things to me, Master."
"You added so many things."
If it weren't for him, she wouldn't have slept for so long.
His modifications had made her stronger, but they had also forced her into deep slumber.
Her words made Izumi's mouth twitch.
Strange things? That sounded extremely misleading.
"…Alright."
"For now, put some proper clothes on."
He sighed.
He knew about her strange tastes, but this was still embarrassing.
Est tilted her head.
"What's wrong?"
"I look normal."
She looked down at herself.
Indeed, she found nothing unusual.
…
Normal? Your thigh-high socks are basically your main body.
Izumi didn't even bother complaining.
He simply projected a sailor uniform and draped it over her.
"Here. Wear this."
"And pay attention to your appearance from now on."
Est looked at the outfit, then at Izumi, and quickly understood.
Without hesitation, she changed into it.
Though her sense of embarrassment was strange, she still understood basic common sense.
After confirming she was dressed, Izumi asked her to return to his Spirit Crest.
Only then did he tear open space and leave the void.
The Type-Moon world had fully merged with his own.
The place he had been standing in was merely a dimensional rift.
Not far away was the world of High School DxD.
However, Izumi did not immediately return there.
Instead, he entered the world inside his body.
Floating in the sky, he looked down at the vast continent below.
Excitement surged within him.
Now this truly looked like a world.
Before, it had only been a small town with a few hundred thousand girls.
That hardly counted as a world.
His appearance immediately drew the attention of Alaya and Gaia.
The two appeared beside him.
"Hehe, you're finally back!"
Gaia clung to him, clearly excited.
Alaya jumped onto his back and hugged him as well.
With one girl in front and one behind, Izumi smiled.
"How does it feel?"
"Now that the worlds have fused, you're not uncomfortable, right?"
The two girls nodded energetically.
"Not at all! It feels amazing!"
"Everything is perfect."
Gaia was especially thrilled.
Now that their world had merged with Izumi's, they could freely leave the Throne of Heroes.
With his permission, they could even travel to other worlds.
They could also use all the abilities of the Type-Moon system.
This freedom felt incredible.
In the past, they had been restricted by the Root.
They couldn't leave the Throne, nor descend directly into the world.
Now, everything had changed.
The Root itself belonged to Izumi.
They were finally liberated.
They could even play with the other girls in his world.
Hearing this, Izumi nodded with satisfaction.
After sensing the condition of his world, his smile widened.
This was truly wonderful.
His world had now become a true great world.
If he continued merging other worlds, it could eventually grow into something like the legendary Little Garden.
And he would be its supreme god.
As long as he kept acquiring worlds, he would continue growing stronger.
His future was limitless.
After finishing his observation, Izumi vanished with Gaia and Alaya.
They returned to his residence within this world.
Illya and the others had already moved into the great tree.
This enormous tree had become a city.
Beneath it were countless houses and towering buildings.
It had become the very center of the world.
Upon arriving, Izumi saw that Megumi and the others had already returned.
But when his gaze fell on Megumi, he froze.
Because she had become incredibly powerful.