I Paired Up With a Woman From an Adventurer Matchmaking App, She Had Perfect Compatibility, But the Worst Personality. When Our Erotic Compatibility Exceeded 200%, She Became the Most Obedient Team Member at Night. - Chapter 6

“Hey, hey, this has to be a joke.”

“Wait, wait, this can’t be real.”

Ironically, Cordelia, who had been too awkward to speak to me until now, found herself uttering the exact same words.
Before us, adventurers with tattered equipment lay collapsed.
This wasn’t just one or two—the numbers were far more grim.
This was a large, elite party formed for the Demon Lord subjugation.
Now, everyone except Cordelia and me had been subdued.

“Hmm. Is this all?”

The voice carried a physiological revulsion, like the wails of resentment leaking from the depths of hell.
The one who spoke—the very architect of this carnage—had a voice that could drain your will just by hearing it.
His height was barely different from that of a human.
Completely shrouded in a pitch-black robe, the Demon King exuded a magic power so intense it felt like it was scorching the surface of my skin. Just standing before him made it painfully clear that he was no ordinary being.
Malevolent, twisted horns sprouted from his head, and the darkness glimpsed within the robe’s gaps was so profound it threatened to swallow me whole.
The moment I saw him, I instinctively knew he was the Demon King himself—an utterly grotesque existence.
He possessed no towering physique that dwarfed humans.
He lacked the brutish strength of a beast or the monstrous form of a demon.
Yet he boasted an overwhelmingly vast amount of magic power, so excessive it bordered on unfair.
That single attribute alone placed him at the pinnacle of the Demon hierarchy, ruling over legions of demons as their king.
Amidst the gruesome scene of slaughtered adventurers, Cordelia and I had escaped unscathed purely by sheer luck.
Our subjugation party stormed into the Demon Lord’s Castle, heading straight for the Demon Lord’s Chamber said to be at its deepest core.
While the castle wasn’t teeming with demons as powerful as the Four Heavenly Kings, the Demon Lord’s closest retainers, it still housed formidable creatures.
Despite this, the adventurers—seasoned veterans, many meeting for the first time—moved forward with remarkable coordination, swiftly defeating enemies.
To be honest, as a small two-person party, we were somewhat overlooked and assigned to the rear guard almost as an afterthought. We barely had a chance to draw our weapons.

“The Demon Lord’s Chamber! Let’s charge straight through!”

“Ooooooh!”

Soon, our group reached the deepest part of the Demon Lord’s Castle.
Two massive, majestic windows adorned with stained glass stood before us.
Between them stood an elaborately carved double door, its ornate design proclaiming it as the most important chamber.
Eagerly, the party threw open the door and surged inside.

“Ah…”

At that moment, Cordelia, who had been running alongside us at a distance, suddenly stumbled and fell to her knees.
Apparently, there was a subtle step at the entrance to the room, and her foot had caught on it.
Though we were no longer on speaking terms, the party hadn’t officially disbanded yet.
Seeing her fall, I also stopped just before the Demon Lord’s Chamber.
And then…
In the next instant, the group that had rushed into the room was struck by a magical attack and collapsed in a heap.

“T-total… e-entry… thud…”

“W-what… happened…?”

“A-ah…”

“It hurts… I can’t… get up…”

Near the entrance of the room, all the adventurers except for us had collapsed onto the floor.
Their bodies were embedded in the marble floor, which continued to creak and groan.
The once-solid marble around them was now crisscrossed with hideous cracks.
A few seemed to retain a sliver of consciousness, but none showed any sign of being able to stand.

“This feeling… could it be gravity manipulation magic?”

“Looks like it.”

Faced with this emergency, our earlier awkwardness vanished.
Cordelia and I huddled together for protection, observing the adventurers’ plight.
Every last one of them was embedded in the floor, as if they had been forcibly pressed down.
At the center of the Demon Lord’s Chamber, where they had been headed, stood the Demon King, one hand outstretched toward us.
Behind him loomed a grand and ostentatious throne.
He must have known we were attacking, yet he sat there leisurely, waiting for us.
Such overwhelming confidence.
But having effortlessly subdued the intruders as planned, he must truly be overwhelmingly powerful.

“Oh…”

The Demon King finally seemed to notice the two of us, who had been cautiously observing the situation.
He tilted his robe-covered neck slightly.
We couldn’t discern his expression beneath the robe, where only pitch-black darkness peeked through, but his gaze shifted toward us with evident curiosity.

“What rotten luck. But at least we’re alive.”

The Demon King had clearly sensed our presence.
Slowly, he turned the hand that wasn’t occupied with the collapsing adventurers toward us.
…Can he really cast two area-of-effect spells simultaneously?!
Area-of-effect spells that blanket an entire area require immense concentration and vast reserves of magic power, far more than ordinary spells.
To suppress over thirty skilled adventurers while casually dealing with us on the side was, frankly, beyond abnormal.

“…Cordelia!”

“Huh?!”

I called out to her beside me. She responded instantly.
There was no time to hesitate.
The Demon King’s gravity manipulation magic was likely to strike at any moment.
To evade the area-of-effect spell, our only option was to move from this spot immediately.
But advancing forward meant entering territory already dominated by the Demon King, where we’d simply join the ranks of those mercilessly slaughtered.
That left only one path… behind us!
My compatibility with Cordelia had plummeted to a mere 0.02%.
As long as we were part of a large party, we could blend into the crowd and avoid notice.
But now that we were alone, everything had changed.
That abysmal 0.02% compatibility was glaringly obvious.
How could two people with such disastrous compatibility possibly stand against the Demon King? It was utterly impossible.
Having lost most of our main fighting force, our only chance for survival was to flee.
That’s why we needed to move… not backward, but sideways!

“I know that!”

Cordelia snapped in response to my words.
We both kicked off the floor and leaped sideways.

“Hmph.”

For the first time, the Demon King, who had maintained an air of composure until now, betrayed a hint of agitation in his voice.
Immediately afterward, the corridor behind us collapsed with a deafening crack.
If we had fled backward as planned, we would have been caught in his gravity manipulation magic.

“…I see. Your petty tricks seem to have some effect. But even if you move sideways, that corridor is a dead end. Either way, escape is impossible…”

Perhaps ashamed of missing his attack, the Demon King droned on and on.
After landing from my sideways leap, I finally raised my weapon.
Directly in front of me was… an intricately designed stained-glass window, set prominently beside the door.
I swung my sword back in a wide arc and slammed it into the stained glass with all my might.
CRASH!
A deafening, ear-splitting sound echoed through the chamber, as if the building itself were groaning in agony.
Crunching through the colorful shards of glass scattered at my feet, I finally stepped into the Demon Lord’s Chamber.

“…Oh, great. What are we going to do now? We’ve finally ended up in the Demon Lord’s Chamber with just the two of us.”

The voice drifted over from beyond the groaning adventurers sprawled on the floor.
Cordelia had jumped to the opposite side, shattered another stained-glass window, and burst into the Demon Lord’s Chamber, just like me.

“What choice did I have? If I’d gone forward, I’d have been crushed along with those guys. If I’d retreated, I’d have been caught in the Demon King’s area-of-effect attack. Even if I’d dodged sideways, he would have quickly regained his footing and blasted me with magic again.”

“So, the only option was to charge in. …Well, I did exactly the same thing, so I can’t really complain.”

Cordelia and I exchanged a small smile, like a shared exhale.
For now, that was enough.
We were the worst possible party members, with a compatibility of just 0.02%.
But when an unavoidable enemy stood before us, and she was the only ally I had…
We had no choice but to believe in that tiny 0.02% and face the challenge together.

“…Humans, trying to act like they know anything about the world.”

The Demon King glared at us, his gaze brimming with hostility.
Well, it was impossible to see his expression beneath the robe that shrouded him in absolute darkness anyway.
I gripped my greatsword, Cordelia her one-handed sword.
We took our stances, surrendering ourselves to the tense atmosphere of the battlefield.
We would likely lose.
But even if we were defeated, we wanted to go down fighting.
That was how we, who had lived as Adventurers, wanted our final moments to be.

“Very well. I shall show you the difference in our power. Come at me, puny humans… and sleep at the bottom of the sea of despair. I shall erase you from this world without even giving you time to dream.”