The White Dragon Emperor, Albion, and the Red Dragon Emperor, Ddraig, were known together as the "Two Heavenly Dragons." Yet their relationship was anything but friendly—if anything, they were sworn enemies.
Why had these two dragons become Longinus-class Sacred Gears in the first place?
At its core, it was because of their endless battles—battles that eventually spiraled out of control and dragged them into the great war between the three Biblical factions.
The White Dragon Emperor and the Red Dragon Emperor being at odds was common knowledge across the world. As for what originally sparked their conflict… even they themselves had long since forgotten.
The only thing that mattered was this:
From the moment Ddraig and Albion first encountered each other, they had either been fighting—or on their way to fight.
Even now, though their souls had been sealed into Sacred Gears, their mutual enmity remained. Whenever they appeared within the same area, they would instinctively resonate with one another.
Because of that influence, the wielders of these two Sacred Gears throughout history had also been drawn into inevitable conflict—becoming mortal enemies, locked in battles where only one could survive.
The white-haired man standing before them was named Vali Lucifer—a direct descendant of the former Demon King, Lucifer.
Although the original Seven Great Demon Kings had all perished during the great war, their bloodlines had endured.
And those descendants believed themselves to be the true heirs of the Demon King legacy. As for the current rulers of the Underworld? Mere impostors in their eyes.
As direct descendants of the original Demon Kings, these devils were typically of the highest rank—not reincarnated devils, but true purebloods.
Vali Lucifer, bearing the name of Lucifer itself, should not have been able to host a Sacred Gear due to his demonic nature.
But there was one crucial detail—
Vali was not a pure devil.
He was a hybrid, born of both human and devil blood.
If Ren Kuroda could be called a half-yokai, then Vali was a half-devil.
And the Longinus Sacred Gear, "Divine Dividing: Wings of the White Dragon Emperor," resided within the human half of his lineage.
With the power of a Sacred Gear, the blood of a Demon King, and his own extraordinary combat talent, Vali had become what was now known as the strongest White Dragon Emperor.
This wasn't a title he had claimed for himself—it was Albion who had declared it.
There had been many wielders of Divine Dividing throughout history, but none like Vali.
Whether in terms of bloodline or natural ability, he stood far above the rest. Even without his Sacred Gear, he could easily defeat most devils.
And with it?
Calling him the strongest in history was no exaggeration.
"Albion… so you've awakened as well," a deep voice echoed from Issei's arm. "And this time, you've chosen a host this outrageous…"
Ever since the night he had been attacked by fallen angels, Issei had only just begun to tap into the power of his Sacred Gear. His strength was still too weak, and his control too unrefined—so Ddraig's consciousness had remained dormant.
But now, with his destined rival—the White Dragon Emperor—standing before him, the resonance between red and white had forcibly awakened Ddraig ahead of time.
As mortal enemies bound by fate, it took only a moment of sensing each other for both dragons to understand their current situations.
"To end up within Vali… even I didn't expect this," Albion's voice replied calmly. "Ddraig, it seems this time, you stand no chance in our destined battle."
The clash between the Two Heavenly Dragons was not just a matter of their own wills—it extended to their hosts.
Since ancient times, the wielders of Divine Dividing and the Boosted Gear had fought each other endlessly, their victories split across generations.
But this time…
The gap between them was overwhelming.
It wouldn't be an exaggeration to say this was the strongest White Dragon Emperor in history facing the weakest Red Dragon Emperor.
Vali possessed unparalleled natural talent and combat prowess.
Meanwhile, Hyoudou Issei…
Was, at his core, just an ordinary, perverted high school boy.
Not only did he lack any remarkable qualities, he didn't even have a proper sense of urgency about this so-called "destined battle."
How could someone like that possibly defeat the strongest White Dragon Emperor?
As for Issei himself, he was completely lost.
White Dragon Emperor? Red Dragon Emperor? Destined battle?
He understood none of it.
But the moment he heard the title "White Dragon Emperor," Kiba stepped forward without hesitation, placing himself between Issei and Vali.
"Run!" Kiba urged urgently.
"I was curious when I heard that the current Red Dragon Emperor had appeared," Vali said, his tone indifferent. "But now that I've seen you… I have to admit, I'm disappointed."
He glanced at Kiba briefly, but his gaze passed over him as if he were insignificant.
"No need to be so tense. I'm not like previous White Dragon Emperors. I won't become a puppet to my Sacred Gear, nor am I particularly interested in this so-called destined battle."
He paused, his eyes narrowing slightly.
"That said… if the Red Dragon Emperor were strong enough, I wouldn't mind testing him."
Vali shifted his attention again.
"Observing the current Red Dragon Emperor was only one of my objectives. The other reason I came here… is to find a certain human."
"The one who killed Raynare—that human is at this academy, isn't he? Azazel wants to meet him."
Although Vali was a devil, he was currently working under Azazel, repaying a favor he had once received.
"Azazel?" a voice suddenly cut in, utterly out of place.
"If I remember correctly, that's the name of the Governor of the Fallen Angels, right?"
"Since I accidentally killed one of his subordinates, it's only natural he'd come looking for an explanation."
A figure had appeared—right between them—without anyone noticing.
"But there's one thing I'm curious about," the newcomer continued casually. "Is this Fallen Angel leader actually strong?"
It was Ren Kuroda.
Vali's expression, which had remained calm and confident until now, finally cracked—his eyes widening in genuine shock.
He hadn't sensed Ren's presence at all.
Not even a trace.
If Ren hadn't spoken, Vali might never have realized he was there.
Originally, bringing this human to meet Azazel had seemed like a trivial task. After all, killing a mere low-ranking fallen angel wasn't anything noteworthy.
But now—
Standing before Ren, Vali felt something stir within him.
Excitement.
"Vali… this one is not simple," Albion warned immediately. "His aura is completely concealed, but I can still sense it. His presence rivals that of a Dragon King. Even you… might be in danger if you fight him."
Though the Two Heavenly Dragons were now nothing more than souls, their perception remained sharp.
The moment Ren appeared, Albion had already issued his warning.
"Yeah… I don't need you to tell me that," Vali replied, a grin slowly spreading across his face.
"The moment he showed up… every inch of my skin started tingling."
His eyes gleamed with anticipation.
"But that just makes it better."
"If there's no danger… then what's the point of fighting at all?"