Seeing Rias take a heavy hit, Sona, Akeno, and the others immediately rushed in to support her.
Although Rias's side had the advantage in numbers, Yasaka was, after all, the Supreme Commander of Kyoto's yokai—a being on par with a Dragon King.
Even against multiple opponents, Rias's group couldn't gain the slightest advantage. In fact, aside from Rias's Power of Destruction and Xenovia's holy sword Durandal, Yasaka didn't even bother dodging the other attacks—they simply couldn't break through her defenses.
That said, while Yasaka clearly held overwhelming power, defeating Rias and the others in a short time wasn't so easy either.
Between the two peerages, there were over a dozen devils present, most of them Sacred Gear users.
Asia's Twilight Healing restored their injuries. Gasper's Evil Eye of Balor could momentarily freeze Yasaka's movements.
Xenovia and Kiba held the front line, while Issei used the power of the Red Dragon Emperor to amplify Rias's destructive attacks.
Their teamwork was seamless—healing, control, buffs—all perfectly coordinated. They were practically treating Yasaka like a raid boss in a dungeon.
On Sona's side, there was a male student named Motohama Shirō, who possessed the Sacred Gear Black Dragon Vein, which housed a fragment of the Black Evil Dragon King Vritra. It allowed him to absorb an opponent's magical power.
But when those black, thread-like dragon veins coiled around Yasaka's wrist, she casually tore them apart as if they were nothing, leaving Shirō completely dumbfounded.
Normally, once ensnared by the Black Dragon Vein, even high-class devils would struggle to break free, forced to watch helplessly as their magic was drained away.
"One of the Five Dragon Kings, Vritra's power?" Yasaka said with a faint scoff. "But your Sacred Gear is only a fragment of him—far from complete."
She flexed her fingers lightly, as if dismissing the very idea.
"Even if Vritra himself stood before me in his prime, he might not be able to do anything to me."
As someone who also stood at the Dragon King tier, Yasaka had every right to say that.
And that was before. Ever since she had learned Ren's Kidō techniques, her strength had risen to yet another level.
The battle raged on, leaving the surrounding walls and floors in complete ruin—there wasn't a single intact surface left.
Fortunately, thanks to the mansion's earlier expansion, the space was vast enough to accommodate the chaos.
But as time passed, Rias's group gradually began to fall into a disadvantage.
And lying on the bed, still bound in chains, Ren could only stare in disbelief.
He had been lying here for so long—was there really not a single person among them who thought to free him first?
Out of the dozen or so devils present, only three or four were male. As the battle intensified, the female devils' clothing had become increasingly… compromised.
Not that Ren minded lying there and enjoying the view in a perfectly civilized manner—but the problem was, at this rate, Rias and the others were definitely going to lose.
After finally getting reinforcements, he had no intention of continuing to be forced into becoming a father on Yasaka's schedule.
"Issei! Get over here and help me!" Ren shouted. "At this rate, you guys don't stand a chance against Yasaka!"
At that moment, Gasper activated his Evil Eye of Balor again, sacrificing most of his remaining magic power to freeze Yasaka's movements for a fraction of a second.
In that tiny window of time, Issei prepared to seize the opportunity and unleash his ultimate move—Dress Break—on Yasaka.
But Ren's shout stopped him cold.
And because of that brief distraction, the moment slipped away.
Before Issei's hand could reach Yasaka's chest, he was met with a powerful slap that sent him skidding face-first across the floor—right to Ren's side.
Climbing back up, Issei looked utterly dejected. He had been so close—just one step away from realizing his dream!
"Forget those stupid thoughts," Ren snapped. "Trust me, if you actually touched her, she'd kill you. Demon or Red Dragon Emperor, it wouldn't matter. Yasaka's completely lost it right now."
A flicker of fear crossed Issei's face as Ren's words sank in, memories of his fallen angel first love—equally dangerous in her own way—surfacing in his mind.
"Sensei… you really know how to play," Issei muttered, glancing at Ren tied to the bed. "I always thought I was the perverted one, but you're on a whole other level."
Only now did Issei properly take in Ren's situation—his limbs bound to the four corners of the bed. His expression turned… complicated.
Honestly, maybe there was a reason this guy was a teacher.
Even Issei, self-proclaimed king of perverts, had to admit—he couldn't top this.
"Cut the crap!" Ren barked. "You think I wanted this? I didn't have a choice! Just use your trump card—Dress Break—on me already!"
Issei understood the situation well enough. He wasn't actually serious about calling Ren a pervert—it had just been a bit of well-timed teasing toward someone he couldn't help envying.
But upon hearing Ren's next words, his expression turned downright bizarre.
He subtly took a few steps back, putting some distance between them.
"Sensei… please have some self-respect," Issei said cautiously. "I know you've saved my life a few times, but this is where I draw the line. And besides, Dress Break only works on beautiful women—I can't… imagine that with a guy!"
This was a disaster!
He, Hyōdō Issei, was destined to become the Harem King! Surrounded by beautiful women—that was his dream!
So what was going on here? First Kiba, then Vali, and now even his own teacher?
All these handsome guys—weren't they wasting those good looks? Instead of chasing girls, why were they all directing weird intentions toward him?
"Get your head out of the gutter!" Ren snapped. "I'm not into guys, and I'm not about to be 'converted' either! I'm not telling you to use Dress Break on my body—I'm telling you to use it on the chains binding my arms and legs!"
He glared at Issei, exasperated.
"As long as I'm free, I can deal with Yasaka. If this keeps up, you're all going to get wrecked!"
The Chain Bind Yasaka had cast, powered by her immense magical energy, could only be broken here by either Rias's Power of Destruction or Issei's Dress Break.
And compared to Rias's dangerously indiscriminate destruction, Issei's ability was far more suitable.
Ren's current condition was far too fragile—if Rias attacked, she might obliterate both the chains and his limbs in the process.
Meanwhile, the principle behind Dress Break was to disrupt the connections within an object or spell, causing it to collapse.
Never underestimate the power of a pervert's imagination.
The technique itself wasn't complicated—most people could theoretically learn it.
But reaching Issei's level of mastery?
That was something almost no one else could achieve.
At the end of the day, it all came down to one thing—
His imagination, fueled by pure, unfiltered perversion, was simply too powerful.