In the infirmary, Shizuka Marikawa stood slowly from behind her desk as chaos echoed from the school corridors. She walked to the window—
And saw a scene of horror.
Students on break in the sports field now moved with twisted limbs and grotesque gaits.
Some were tackled by sprinting figures coming out of the school building, pinned to the ground and bitten.
"W-What is happening out there?"
"Saeko-san."
Marikawa turned to her side, where Busujima Saeko stood, face grim.
The chaos was spreading at a rate visible to the naked eye.
The cause? Still unknown.
The violet-haired girl held a wooden sword, eyes locked on the view beyond the window.
Everything happening… was tied to the dimensional chat group—
And the rescue mission it had activated.
Busujima Saeko understood.
Even if she didn't fully grasp how strong beings like "Railgun" or "Normal High School Student" truly were,
She wasn't foolish enough to place all her hopes on strangers.
Students fled through the hallways, desperately searching for shelter.
In a situation like this, any misplaced mercy or idealism—
Could very well get you killed.
"We're in the middle of a full-blown outbreak… Let's stay here. The others will come for us soon," Saeko said grimly.
"But things are getting so chaotic outside…"
Shizuka, still as airheaded as ever despite realizing the severity of the situation, tiptoed over to fetch some ointment and medical supplies, tucking them into her handbag.
As for what they should do next—
She didn't have a concrete plan.
Best to just follow Saeko's lead. That girl looked reliable!
—
Loud, unhidden footsteps rang through the hallway—immediately drawing the dead's attention.
As several twisted, undead students rushed forward,
Misaka Mikoto flicked a coin from her palm.
Electricity crackled at her fingertips.
She pointed down the hallway—
And with a flash, used electromagnetic propulsion to fire the coin at three times the speed of sound.
Boom—!!
The coin's massive energy shattered the tiles beneath it, blasting the incoming zombies to bits.
"Third-ranked of Academy City's seven Level 5 espers… Standing at the top of 2.4 million people."
Watching the zombies get obliterated in an instant, Shirakawa couldn't help but mutter in awe.
He promptly summoned the Holy Sword: All Things Of Creation.
Might as well put on a show.
As for his new class, Arch-wizard, its basic spells probably wouldn't do much here.
And the pinpoint-demolition Explosion Magic wasn't something he intended to use just yet.
"You're amazing," he said.
"Though I'm curious how powerful Explosion Magic would be in full force…"
Meanwhile—
Inside the Dimensional Chat Group, the livestream from the Highschool of the Dead world now followed Misaka and Shirakawa.
After witnessing her attack—
The group chat exploded:
Mistress of the Butterfly Estate: Huh? So Railgun's really that strong? This is what extraordinary people from Academy City are like, huh. Level 5…
Future Holy Sword Wielder: No wonder she was interested in the magic device. Her abilities have that kind of vibe too.
Mai Sakurajima: We're both high schoolers, so why does my world have to be so… normal?
Asuna: Railgun's scary powerful. But I wonder how strong "Normal High School Student" is. If he's allowed to take missions, they should be on a similar level?
Mistress of the Butterfly Estate: I watched the last livestream. Railgun's probably stronger. As for the other one…
Seems like his style is more sword-based.
Aqua: Why do all my reincarnated teammates suck? If only I had someone like @Railgun, defeating the Demon King would be a breeze!
The messages scrolled wildly.
If Misaka saw what Aqua wrote, she'd probably flip her lid.
Being isekai'd might be a miracle for the dead—
But for the living, it was a slap in the face.
Back in the real world—
Shirakawa and Misaka continued forward, climbing higher into the school building.
Their footsteps drew more and more undead.
He glanced sideways as Misaka pulled out another coin.
He couldn't help wondering—
Do killing zombies give experience points?
Activating Magic Release to its maximum setting, he burned through 3% mana per minute.
But thanks to the core skills of his new job class, it was sustainable.
He felt it in every cell—his body buzzed with energy.
His stats tripled.
He was well beyond the realm of humanity now.
A torrent of pure mana surged into All Things of Creation.
The crimson blade gleamed with an unholy radiance—
No longer a holy sword.
A demon sword might be a more accurate name.
"These zombies—leave them to me," Shirakawa said lightly.
"…"
Drawn by the tremendous surge of energy, Misaka glanced over.
She slowly retrieved her unused coin.
She too was curious.
What kind of power did this "Holy Sword Wielder" from another world possess?
And then—
Before she could even think further, Shirakawa's figure vanished.
Gone.
Not even Misaka's reflexes could keep up.
The air itself was sucked out in a vacuum—
Nearby windows shattered, air rushing inward like a vortex.
Her pleated skirt flared from the sudden gale.
Then came the roar of crumbling concrete.
A dark-red slash, rivaling even the Railgun's speed, reduced the swarm of zombies to atomized mist.
Entire classroom walls were pulverized.
The end of the hallway—blasted straight through.
Beyond it, only a ruined gray cityscape remained.
Misaka Mikoto stood frozen.
Utterly overwhelmed.
No words came.
That speed… that destruction…
Was that really—
Power a human could possess?
Just a few days ago, his strength in the livestream had seemed comparable to a Level 4 esper.
But now…?
She wasn't the only one stunned.
Everyone watching through Shirakawa's stream in the Dimensional Chat Group—
Fell into stunned silence.
Before the chat...
Erupted.