Perhaps it was because he had grown stronger—
but Izumi's "needs" in certain areas had also become… far more intense.
Avrora alone simply couldn't keep up with him.
In the end, thoroughly fired up, Izumi dragged the others over as well.
It had been a while since they were all together like this.
Rias, Akeno, and Asia were all pulled in—
and what followed was, in essence, a rather lively gathering.
...
After thoroughly satisfying himself, Izumi sat atop a massive tree, gazing down at the bustling Dimension City below.
At the same time, he began to think.
He had promised Captain Levi that he would resolve the issues in their world.
And worlds like Levi's…
there were probably many more.
Which meant—
he would likely encounter similar requests in the future.
In that case…
maybe he should create something like a mission hall?
At that thought, Izumi's eyes lit up.
That might actually work.
Without hesitation, he vanished on the spot.
...
The next moment, he appeared beside Aihara Enju.
She was currently in the middle of receiving a guest.
Izumi overheard part of their conversation.
"Modern Magic, huh…"
"We do have quite a bit of that here."
"But most of what you're offering, we already possess."
"Unless you can provide something we don't have, we won't be able to accept it."
Enju spoke calmly to the girl in front of her.
Hearing that, the girl's expression fell slightly.
She had thought her knowledge of Modern Magic could earn her something.
At that moment, Enju noticed Izumi.
"Izumi-oniisan."
"Did you come for something?"
The girl beside her also looked over curiously.
Izumi rolled his eyes.
"Can't I come see you without a reason?"
"Seriously… you make it sound like I only show up when I need something."
He looked genuinely exasperated.
Enju tilted her head.
"Isn't that the case?"
"Every time you come, there's always something."
"Right now, I need to finish this transaction first."
"If it's important, you can wait a bit."
With that, she turned her attention back to the girl.
Izumi chuckled softly and looked at her as well.
Under their gaze, the girl quickly introduced herself.
"Um… hello."
"My name is Shiba Miyuki."
"Please treat me well."
Her manners were impeccable—
clearly the upbringing of a refined young lady.
A faint smile appeared in Izumi's eyes.
"Shiba Miyuki, huh?"
"I know you."
"Did you run into some trouble?"
After all—
she was the little sister of that overpowered genius.
Miyuki nodded slightly, looking troubled.
"It's nothing serious…"
"I was just a bit disappointed."
"I didn't expect you to already have Modern Magic here."
"May I ask… has someone from our world come here before?"
"Or… do other worlds also have Modern Magic?"
She was genuinely curious.
Had someone from her world visited before?
Or was this knowledge more widespread than she thought?
Hearing this, Enju glanced at Izumi.
"You'll have to ask Izumi-oniisan about that."
"He's the one who brought those things here."
Miyuki froze.
He was the source?
Izumi smiled faintly.
"Well, aside from your world, I haven't seen it elsewhere."
"The Modern Magic we have here does come from your world."
"Most of your basic magic—we already possess."
"Even some Strategic-Class Magic."
As he spoke, he pulled up the exchange list.
Miyuki's eyes widened as she read through it.
Especially when she saw one particular entry—
her expression turned to shock.
"Incredible…"
"Material Burst…?"
"Did you develop this magic here?"
Izumi raised an eyebrow.
"You don't recognize it?"
That was unexpected.
Given her age, she should at least know about it.
Miyuki shook her head, confused.
"No…"
"I've never heard of it."
"Is… that strange?"
Now it was Izumi's turn to be curious.
He studied her for a moment.
With his current abilities, her entire life history unfolded in his mind instantly.
After reviewing it, Izumi couldn't help but smile.
So that's how it is…
Shiba Tatsuya didn't exist in this world.
No wonder she didn't know.
A playful smile spread across his face.
Looking at Miyuki, he began explaining.
At the same time, he directly took out the Strategic-Class Magic—
and placed it in her hands.
"This is for you."
"In exchange, sell us your family's secret techniques."
"And bring more people from your world."
"Gather your classmates—form a mercenary group."
"Take on missions in other worlds and earn points."
Miyuki stared at the item in her hands, completely stunned.
"Eh?"
"Give it to me…?"
"This is far too valuable—I can't accept it!"
She hurriedly tried to return it.
After all—
Material Burst was worth over a million points.
There was no way she could afford it.
Izumi simply shook his head—
and directly infused the magic into her mind.
Then he looked at her with a teasing smile.
"Think of it as an engagement gift."
Miyuki froze.
"En… en-engagement gift?!"
Her entire face flushed crimson.
"H-how could you say that?!"
"We've only just met—!"
Seeing her flustered reaction, Izumi's smile widened.
Beside them, Enju looked at him with a deadpan expression.
Izumi-sama is way too mean…
He was clearly teasing her.
And—
he had definitely taken a liking to this girl.
So unfaithful.
He already had them, and yet he was still flirting.
Unacceptable.
Enju puffed her cheeks slightly, clearly dissatisfied.
Izumi noticed her gaze.
Reaching out, he patted her head before continuing.
"Alright, alright—I'm just joking."
"Go back and bring more people."
"Saegusa Mayumi, Shibata Mizuki…"
"And your sisters—Shiba Maya and Shiba Miya. Bring them too."
"You can form a mercenary group and help other worlds solve their problems."
Yes—
in this world, Shiba Maya and Shiba Miya were Miyuki's sisters.
Not like in the original story.
That was why Izumi said it so casually.
But Miyuki—
was completely stunned.
She stared at him in disbelief.
"Izumi-san…"
"You… know my sisters?"