Classmate wa Isekai de Yuusha ni Natta kedo, Ore dake Gendai Nihon ni Okizari ni Narimashita - Chapter 78

Chapter 78 – A Formal Invitation to the Mansion (Part 6)

Inside the puppet’s torso, a certain device had been installed.

The moment it activated, the puppet burst like an overfilled water balloon—exploding into a blast of ice shards coated in slime-like fluid that sprayed in every direction.

In short, it was a self-destruct mechanism.

A last-resort failsafe: if the puppet’s identity was compromised, it could instantly neutralize the enemy and vanish without a trace. Nothing remained but water, leaving no evidence, no cleanup needed.

As last resorts go, it was close to perfect.

But of course, even something this convenient came with drawbacks.

The biggest one? Once it self-destructs, that puppet can’t be reused.

Arms and legs could be rebuilt as long as there was water nearby—but the torso, which housed the puppet’s central functions and control systems, couldn’t be replaced so easily.

Which meant… if I used the failsafe at the wrong time—

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(…I'd end up having to show up myself, like this.)

I sighed as I stood over the crumpled form of the monster, clutching its gut in pain after the blast.

Luckily, the drones created by the puppet and its fragments were still sending out location signals, which allowed me to teleport directly to the scene using Spatial Transfer Magic.

Now came the real problem: getting back out.

The puppet was gone, its connection severed—but the drones were still functioning.

“U-um… hey, earlier… that axe…!”

As I sorted through my options, Koharu pointed nervously at my arm, her voice unsure.

Ah, right. Something had hit me before I returned. I’d brushed it off without thinking.

So that was the axe the monster threw?

I hadn’t even noticed. No pain, no impact. I’d thought it was just some random debris or stage prop.

“Don’t worry about it. More important is figuring out a safe way out of here.”

“In that case… I think that door leads somewhere safe.”

She pointed toward a door leaking a golden glow from its seams.

It looked to be several hundred meters away from where we stood—far, but not unmanageable.

Certainly not enough to warrant burning through any Skills.

“W-wait, what do you mean by—”
“Try not to bite your tongue.”
“Wait, what—kyaaaaa!?”

Once she clung tightly to my back, I took off—sprinting full speed toward the glowing exit.

‘GYA-GYA!?’

Suddenly, staircases embedded in the walls and floors began shifting violently, moving to crush or block our path.

But I dodged them with ease.

Given the distance, my current speed, and the monster still reeling from the earlier blast, we’d likely reach the door in under ten minutes.

That is… until—

‘GYA… GUGAAAAA?!’

The monster let out a guttural roar and began to convulse. Its body twisted unnaturally before it tore free of its restraints through sheer brute force.

Before my eyes, it transformed—its body expanding to over five meters tall, massive tree-trunk arms ripping a pillar from the ground and hurling it at us with terrifying force.

“…!”

I kicked it midair, shattering the entire thing into splinters. The monster’s jaundiced eyes burned crimson with rage.

“…Seriously? You can do that too?”

It grabbed another pillar, tearing it out by the roots, and hurled it again. At first, the throws were wild and aimless—but then they started getting dangerously accurate. One even grazed the hem of my coat.

The drones scattered throughout the mansion were built for scouting, not combat. Their weaponry was minimal—barely enough for recon, let alone protection.

I didn’t have time to wait for backup.

Especially not while carrying Koharu.

(Which means… I’ll have to use that.)

I glanced at Koharu, who still clung to my back like her life depended on it.

“What I’m about to do is going to be a little reckless. Bear with me, alright?”

“I don’t care how reckless it is—just stop that thing!”

With her permission, I leapt into the air—then began weaving subtle shifts in position using Spatial Transfer Magic, dodging each pillar and projectile with razor-thin margins.

‘GUUU… GAAAAAAA!!’

Frustrated, the monster bellowed and summoned reinforcements from the surrounding darkness.

Smaller than it, but still massive—these new figures carried black crates on their backs, awaiting orders.

“You said you’re out of defensive spells, right?”

“…Yes. I’m sorry, I don’t have any more energy.”

“Don’t apologize. Just focus on what I told you earlier—keeping yourself safe.”

“O-okay.”

Once I got her confirmation, I created a lifeline using Ice Magic and attached it to the ceiling, then used a shifting staircase as leverage to swing us right past the monster’s field of vision—further riling it up.

‘GYA! GYAAAAA!’
‘GIIIIII!’

The hulking beast reached into the black crate and pulled out a makeshift warhammer—an enormous black boulder tied to an equally massive log. One strike from that thing could flatten a grown man in a heartbeat.

‘GYAGYAGYAGYA!’

It sneered, delighted, and raised the hammer without hesitation—swinging it straight for my skull.

No one could survive a direct hit from something like that.

But—

‘GYA—?!’
“…Huh?”

The monster froze.

So did Koharu.

The moment the hammer struck my head—it shattered.

The boulder cracked apart. The log split clean down the middle.

The creature’s expression twisted into open shock.

I exhaled slowly, flexed my right hand, and clenched my fist.

“Alright then. How about you take one from me?”

And with that, I drove my fist into the monster’s face—straight through it—with everything I had.

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