Othinus did not back down in the face of Izumi's threat.
Even though she had been reduced to a human—
She was still the proud Magic God.
"Hmph. Just you wait."
"If I ever get the chance… I'll make you regret this."
The moment she finished speaking, she moved—
Jumping toward the window, attempting to escape.
…Unfortunately for her, that was never going to happen.
Izumi's expression darkened slightly.
"Oh? Still trying to act tough?"
"Looks like you really need to be taught a lesson."
There was a strange glint in his eyes.
This girl—
Had the audacity to threaten him in his own world?
That wasn't bravery.
That was just asking for trouble.
With a mere thought—
Othinus froze mid-motion.
Her body locked in place as an invisible force seized her.
The next instant—
She was pulled straight back into Izumi's grasp.
He pinched her cheek lightly, forcing her to look at him.
"If that's the case…"
"Then I guess I'll have to leave my mark on you."
Othinus's pupils shrank.
A sense of danger surged through her—
But it was already too late.
Izumi narrowed his eyes.
And acted.
A surge of power erupted from him.
The Third Magic.
Perpetual Energy.
Pure, overwhelming energy flooded into Othinus's body.
"Ngh—?!"
"What are you—?!"
"Stop it!! What is this—this disgusting—!!"
She struggled.
She resisted.
She screamed.
But none of it mattered.
Her power—
What little remained—
Was forcefully expelled.
Replaced.
Overwritten.
Izumi's energy took its place, completely integrating into her existence.
It wasn't destruction.
It was domination.
A complete rewrite.
A transformation that made her—
Irreversibly tied to him.
"Damn it!!"
"Let go of me!!"
Her voice echoed in the room.
But there was no one to hear it.
No one to save her.
In the end—
All resistance faded.
When it was over, Izumi stepped back, satisfied.
"Good."
"That should do it."
He stretched slightly, as if finishing a trivial task.
"Get some rest."
"Let's see how you cause trouble now."
A faint, mischievous smile appeared on his lips.
And just like that—
He turned and left.
Leaving behind a completely shaken, teary-eyed Othinus.
...
After that—
Izumi didn't immediately head to another world.
Instead, he stayed.
For a while, he simply enjoyed his own world.
A world where everything was thriving.
Where conflicts were settled through games.
Where people had gradually begun to accept—and even embrace—the new rules.
Especially the younger girls under Izumi's care.
They frequently wandered across different regions—
Challenging elves, spirits, and other races to games.
Winning abilities.
Winning magic.
Having fun.
Seeing this, Izumi felt at ease.
Everything was proceeding exactly as he wanted.
...
At the base of the World Tree where he resided—
Izumi brought out a special artifact.
The Gate of Interdimensional Passage.
With a wave of his hand—
A portal opened.
Leading to the world of High School DxD.
From now on, travel between the two worlds would be possible.
Of course—
Restrictions were set.
"No unauthorized passage above SS-class."
Izumi wasn't about to let powerful beings casually cross over and cause chaos.
Once everything was prepared—
Rias Gremory and the others chose to return to their original world for a while.
After all, they had been away for quite some time.
It was only natural to visit their families.
At the same time, Gabriel and the other angels also returned to Heaven—
To inform Michael about the revival of God.
For a time—
Most people left.
Izumi clicked his tongue slightly.
"…Guess I'll be going alone next time."
But he didn't mind.
With a casual motion, he summoned the Dimensional Gate once more—
And stepped through.
...
The moment Izumi emerged—
An attack flew straight toward his face.
Without hesitation, he raised his hand.
Smack.
The energy blast was casually dispersed.
He glanced around.
A battle was already underway.
Multiple figures clashed in the distance, their attacks colliding violently.
Yet—
No one paid attention to him.
That earlier attack?
Just stray fire.
Izumi narrowed his eyes slightly.
"…Interesting."
"What world is this?"
But then—
Something caught his attention.
A figure.
Falling toward him.
Silver hair.
Familiar presence.
His mind immediately connected the dots.
"…Kiana?"
He paused.
"…No. Cecilia."
A smile spread across his face.
"So that's how it is."
Without hesitation, he vanished—
Reappearing exactly where she would land.
And caught her.
A beautiful silver-haired woman, unconscious in his arms.
Cradled effortlessly.
His gaze shifted toward the battlefield.
"…Welt Yang."
"The Herrscher of Reason, huh…"
He murmured to himself.
But he had no intention of interfering.
Not now.
Instead—
He simply turned and disappeared.
Just like that.
...
In the distance—
A young man stared blankly at where Izumi had vanished.
Siegfried Kaslana
He didn't understand why—
But he felt like he had just lost something incredibly important.
Something that should have been his.
Yet—
There was nothing he could do.
...
Back in his own world—
Izumi reappeared.
Still holding Cecilia.
He had already recorded the coordinates of that world.
Time flowed differently between worlds.
By the time he returned—
Years, perhaps decades, might pass there.
"…That works."
A faint smirk appeared.
"When I go back… maybe I'll meet Kiana too."
Kiana Kaslana
"…Cecilia, Kiana… maybe even Kallen."
Kallen Kaslana
"That would be interesting."
His smile turned slightly mischievous.
Very much so.
He glanced down at the unconscious woman in his arms—
Then headed toward Aogiri Aika and the others.
They stared at him in confusion.
"…Wait."
"You said you were going to another world."
"And you came back already?"
"And… brought someone with you?"
Izumi shrugged casually.
"No."
"She just happened to fall into my arms."
"Anyway—heal her."
"This world… is pretty interesting."
His tone was light.
But his eyes—
Were already filled with anticipation.