DxD: Multiverse Domination with the Origin System

"Phew!"

The long-haired, black-clad high school girl sitting on the sofa let out a weak breath.

The magic book in her hand slipped to the floor, and her legs—now bare without black stockings—shimmered under the light.

In front of her, Kuroki Ren held a cup of black tea, looking at her with amusement.

"By the way, don't push yourself too hard when learning magic for the first time. Your magic power must be completely drained by now."

Though he said that, he genuinely admired Kasumigaoka Utaha's magical talent.

In just a few hours, she had completed the basics of magic—making her a fully qualified low-level devil.

"Who knew it would be like this? You didn't even warn me." Utaha rolled her eyes and weakly propped herself up. "By the way, my perverted Master, your familiar is like this, and you're just going to sit there staring at my legs? Aren't you going to think of a solution?"

"Since you put it that way, I'll replenish your magic for you, then."

"Replenish magic? You mean you can restore magic power?"

Utaha's eyes lit up. "There's a method like that? Hurry up and use it!"

"You said it—remember that."

Utaha, who only wanted to restore her magic power, was initially full of anticipation. But then she noticed Kuroki Ren's red eyes getting closer… and closer.

Eh? Eh?

Does replenishing magic require getting this close?

Just as she was about to ask—

Her mouth was sealed.

!!!

Kasumigaoka Utaha's beautiful eyes widened.

This is… replenishing magic?

...

The room fell silent.

Only the flow of magic power circulated and transferred between their bodies.

"Pervert Master, you were planning this all along, weren't you?"

Utaha's feet curled up involuntarily, her face flushed with embarrassment.

"I'm seriously working hard to restore your magic power, you know."

Ren looked wronged.

"…"

Utaha looked at Kuroki Ren in disbelief, her small fists clenching slightly.

So I'm the one taking advantage of you, is that it?

So annoying!

Ren took out his phone and said, "Next time, be careful not to over-exhaust your magic. I've sent you the info—go ahead and arrange to transfer to my school."

Utaha took a deep breath and asked suspiciously, "Devils go to school too?"

"Of course. Didn't you see my school uniform?"

"Sorry, I thought it was just some peculiar fetish of my perverted Master."

"Oh, and keep that flyer. If there's any danger, just use it to summon me."

Ren paused for a moment and then gave a few more instructions, explaining some important things.

Although Utaha had extraordinary talent and was now a low-level devil, in the supernatural world, she was still a complete novice—so he had to be a bit more careful with her.

"Okay, I'll be mindful."

Hearing that the topic had shifted to serious matters, Utaha stopped with the sarcasm and listened carefully before finally saying:

"I'll transfer as soon as I can."

"Mm!"

Kuroki Ren nodded.

In the next instant, the light of a magic circle appeared beneath his feet.

It was teleportation magic—a common spell used by devils. As long as the teleportation array was set up, one could traverse space at incredible speed.

However, despite being common, it wasn't easy to master.

Kuroki Ren had put in a great deal of effort to learn this spell back then.

Whoosh!

With a flash of light, Ren's figure had already returned to his home.

He lived alone in an apartment unit.

However, there were no neighbors around—because the entire apartment building belonged to him.

Even though it was late at night, Kuroki Ren didn't go to sleep. Instead, he pulled out more magic books.

Rias's stash still had plenty left; he couldn't afford to waste time.

Anyway, as a devil, going a few days without sleep was harmless.

...

In the blink of an eye—Several days passed.

At this moment—

Inside the apartment room—

Kuroki Ren leaned on the sofa, his eyes slightly closed.

From the outside, it looked like he was dozing off.

But inside his body, earth-shattering changes were taking place.

His once-surging magic power was growing stronger with every passing moment, like a powerful, rising tide.

After an unknown amount of time, Kuroki Ren finally exhaled a heavy breath and summoned his virtual panel.

[Kuroki Ren]

Class: Original Magician

Magic: Origin Thunder Magic LV10 (+)

Origin: 10 points

"The cost of upgrading Origin Magic keeps getting higher..."

Looking at the text, Kuroki Ren murmured quietly to himself.

During this entire period, he hadn't stepped out of his room.

As for school matters, all he had to do was inform Rias, and everything would be taken care of.

Aside from a few calls from Utaha reporting on her transfer progress, no one disturbed him.

After several days of neglecting sleep and food, he finally finished reading all the magic books he had accumulated, gained a large number of Origin Points, and then used them all to enhance his Origin Magic.

Compared to ordinary magic, upgrading Origin Magic was even more terrifying.

It had consumed all of his Origin Points just to reach Level 10.

However, his strength had undergone a complete transformation.

Even Kuroki Ren himself wasn't sure of his current level.

If judged by standard measurements of magical power, he should have just stepped into the realm of the ultimate-class devils.

But if he relied on Origin Magic, he had no idea what level his actual combat power could reach.

"I wonder if I can contend with those monster-tier ultimate-class devils now..."

Beyond the high-ranking devil tier, the strength gap often became enormous.

Within the same class, instant kills weren't unheard of.

After all, magical power was only a rough metric for measuring strength.

Sacred Gears—and even God-Slaying Gears—could cause one's combat power to soar to terrifying levels.

"But it really lives up to the name Origin Magic… every upgrade transforms my body."

Slightly clenching his fist, a smile curved on Kuroki Ren's lips.

Before this, he had been a typical magic artillery type.

But now, he had developed in all areas.

Not just physically—his perception had also become far beyond ordinary limits.

"Hmm?"

Ren's expression hardened as he walked toward the window.

Just now, he had actually sensed the aura of light.

This was Kuoh Town—the devils' territory—and those who wielded the power of light wouldn't normally come near this place.

Without hesitation, Kuroki Ren sharpened his perception.

A moment later, his eyes turned cold. "Oh? Seems like some pests have forgotten their place."

A terrifying killing intent erupted from him, causing the surrounding air to tremble.

One of Rias's peerage members was being hunted.