Dungeon Mutation
A day had passed.
Baek Do-yoon's party still hadn't managed so much as a moment's sleep inside the cabin, thanks to the endless stream of lewd moans pouring out of the room. The wet slap of flesh and the cries of pleasure rolled on through the night like animals in heat, mocking the silence of the safe zone.
In the end, they made their decision. Baek Do-yoon's party slipped out of the cabin and quietly shut the door. At the edge of the dim safe zone, right against the blue barrier's boundary, the three of them gathered.
"We're leaving. Getting mixed up with a maniac like that… it won't end well."
Park Hyun-woo muttered the words with effort, his face drained of color.
"He's right, Seo-ah. That guy isn't right in the head. Stick around any longer and you'll end up completely devoured, just like the women in there."
"…Even if we leave, can we actually survive? The Skeleton Knights are everywhere outside. We have no food, and we don't have the strength."
She coldly laid out the situation.
"Hyun-woo oppa's injuries are serious, and Tae-yoon oppa still hasn't even regained consciousness."
"We'll figure something out! Better to die fighting out there than stay with that bastard Lee Seo-jun!"
Baek Do-yoon snapped, voice cracking with emotion—but he already knew the truth. Without Lee Seo-jun's power, they wouldn't even reach the threshold of the boss room before being ground to bone dust.
Still, he couldn't stand watching the girl he liked get taken by another man right in front of him.
"Let's go. If we're going to die either way—humiliated in here or as human beings out there—I'll take the latter."
Baek Do-yoon roughly seized Han Seo-ah's wrist. She shook his hand off with a cold, sharp motion.
"Get a grip, Do-yoon. Even so, this is way too emotional a decision."
Han Seo-ah's voice dropped, ice-cold.
"I know what's going on in that room. But if we move because of your feelings right now, everyone here dies. Hyun-woo oppa and Tae-yoon oppa included."
She turned her head back toward the cabin.
"Let's hold out a little longer. Just until the Administration Bureau sends a rescue team… As long as this safe zone holds, we can manage somehow…"
She had a reason she absolutely could not die here.
I had Park Yu-jin bent face-down on the bed, then stacked Kim Ha-eun on top of her so that Ha-eun's breasts and stomach pressed flush against Yu-jin's back.
Their asses sat staggered one above the other in front of me—a living tower of flesh.
"Both of you. Spread those asses wider."
"Yeees♡"
"Fine, just… hurry…♡"
The two women did as they were told, reaching back to pull their own cheeks apart at the same time. Fingers sank into soft flesh, fully exposing two already soaked cunts.
I pushed my cock halfway into Yu-jin's pussy underneath first, then pulled out while keeping that slick, wet sensation and drove it deep into Ha-eun's instead.
Squelch! Schlick!
"Nngh♡ Ahng♡"
"Ahn♡ Cock♡ Feels so good♡"
The hot cock that had just dragged through Yu-jin's cunt immediately crushed against Ha-eun's cervix, then, coated thick with her juices, slammed all the way into the deepest part of Yu-jin again.
Thwack! Squelch! Schlick!
"Hiiik! Uwaah♡ Yu-jin's pussy juice is pouring into me…! Ahhhnn♡!"
"M-me too…! Mixed with Ha-eun's… it's so hot inside…! Ahn♡ Ahn♡"
Their stacked bodies trembled, linked by a single cock. Every time I thrust alternating between them, their walls clenched so tight there wasn't room for a finger, strangling my shaft.
I lost track of how long I fucked, pounded, and came into those cunts.
Sprawled between the two unconscious naked women, I groped their tits and toyed with their limp nipples.
Hmm… something's off.
With my balls emptied and post-nut clarity setting in, cold reason finally came back online.
Ever since I'd gained this demonic energy, it had felt like I'd lost control and been dragged around by pure instinct. I'd always been the type to act without thinking, but now the brakes were completely gone—like a starving beast.
In reality, I was trying not to do anything that would cause real problems if I could help it.
But at some point I'd gone past just enjoying the situation and started going berserk.
I took my hand off Kim Ha-eun's limp chest and slowly sat up.
With my head clear, I needed to check the true nature of the power churning inside me.
If this force wasn't simply fuel for growth but a poison that was actively eating into my personality and instincts in real time, I might eventually become a monster with no self left at all.
I closed my eyes and focused my consciousness on my dantian. In the darkness, golden energy and black energy snarled and thrashed like beasts.
So yang energy was originally gold.
Then the black was demonic energy. I focused my awareness on it.
A murky, violent force was suppressing the yang energy inside my dantian.
I'd thought it was rough and aggressive from the start, but maybe because it had mixed with the dungeon's mana, it was in a far more raw state than before.
The yang energy instinctively tried to burn and purify this foreign demonic power—but the problem was the sheer volume.
It's gotten way too swollen.
I kept absorbing without rest, so it had grown too rough and massive for my mental vessel to handle.
The closer I felt it, the more it constantly goaded me toward destruction and rape.
I need to seal it.
I slowly began throttling the absorption of demonic energy—down to a thread-thin trickle.
The clash between the two energies gradually subsided.
It wasn't perfectly stable, but compared to the rampage, it was much better. Reason returned with sharp clarity.
I can't stay like this.
In a work of fiction it might be fine, but if I kept losing it in reality, I'd end up in prison or dead for sure.
I got up, roughly wiped myself down with some bottled water, and left the room. In the living room there was only Choi Jae-hyuk and the unconscious, injured members of Baek Do-yoon's party.
"Where are Han Seo-ah and Baek Do-yoon?"
"…They went outside. Said they couldn't watch you two going at it anymore."
Choi Jae-hyuk was shaking, barely holding his rage in check. He'd bitten his lip so hard that beads of blood had formed, and he refused to meet my eyes.
"Jae-hyuk."
"…What."
"Ha-eun's pussy tasted pretty good. At first she tried to pull away, but later she was the one grinding her hips and begging me to fuck her harder."
"You son of a bitch!"
He finally snapped, swinging a fist as he charged—I casually kicked him in the solar plexus.
"Guh…! Ugh…!"
I grabbed a fistful of his hair as he writhed on the floor and hauled him up.
"From now on, I'll be managing your girlfriend's cunt. You just sit on the side, watch, and keep your mouth open. In case you want the leftovers."
"Aaaagh! I'll kill you…!"
"Go ahead and try, if you can. Just don't starve to death first."
I tossed him aside like trash and opened the cabin door.
I had no intention of letting that bastard leave this dungeon alive anyway, so I could treat him however I wanted.
At the far edge of the safe zone's blue barrier, I spotted Han Seo-ah, Baek Do-yoon, and the rest of the deadweight.
The look in Han Seo-ah's eyes when she saw me was nothing like the favorable one from our first meeting.
Not hostile, either. Whatever else, I hadn't done anything wrong to her. I was the one who'd saved them in the crisis, and what happened in that room had been a mutually agreed price of survival.
Still, it pisses me off.
Originally I'd planned to rescue her, get closer little by little, and make her mine. Somehow the rampaging demonic energy had taken over instead, and I'd left the worst possible impression.
Can I still salvage this?
I shoved the complicated calculations aside and walked slowly toward Han Seo-ah.
"Can we talk?"
At my words, Baek Do-yoon immediately stepped in front of her like he'd been waiting for the chance, snarling.
"Don't come any closer! I don't know what you're thinking, but if you take one more step, I won't just stand here!"
I treated Baek Do-yoon like he was invisible and locked my eyes only on Han Seo-ah.
"You want to talk or not?"
"It's fine, Do-yoon. …Seo-jun, can we talk right here?"
"Well, it's a little sensitive for right here. It's about your party members' survival. You sure you want to have that conversation in front of everyone?"
"…Alright."
"Seo-ah!"
"Seo-ah, are you crazy? It's dangerous!"
Baek Do-yoon and Park Hyun-woo shouted at the same time, but Han Seo-ah firmly raised a hand and stopped them.
"It's okay. Seo-jun, where should we talk?"
"Want to take a short walk?"
Suspicion flickered through her eyes at my suggestion.
"…Isn't that dangerous? We're inside a dungeon."
"Unless it's the boss, there's not much in this dungeon that can threaten me. And don't worry—we won't go far."
Faced with my confidence, Han Seo-ah finally gave in and moved her heavy feet.
"Alright. Let's go."
Just the two of us, we turned our backs on the safe zone's blue barrier and stepped onto the dim forest path. Baek Do-yoon's searing glare from behind gradually faded into the distance.
"What did you want to say?"
Han Seo-ah stopped first and asked.
I looked at her for a moment, then put on the softest expression I could manage and opened my mouth.
"First of all—I'm sorry. I think I went too far."
Her eyes went wide at the sudden apology. The shock on her face made it clear she'd never expected those words to come out of my mouth first.
"…No. Do-yoon and Hyun-woo oppa were wrong first, and they really were rude to you. I get it."
"This is a gift."
I pulled a few cans of food, clean bottled water, and some jerky from my storage and handed them to her.
"Didn't you say we had to… do that… to make this?"
She hesitated, staring at the supplies I'd given her.
"Two people were enough. That much should keep your party going for a few days without any problem."
"…Those women—they're doing it because they want to?"
Han Seo-ah's eyes carefully searched my face. The memory of Park Yu-jin and Kim Ha-eun's filthy moans must have flashed through her mind; a faint tremor ran along the edge of her eyes.
"Yeah. It's not like I dragged them off and raped them, right?"
At my shameless answer she made a complicated face, then finally lowered her head a little.
"I'm sorry. Honestly, if it weren't for you we'd already be dead, and I feel like we only thought about our own side."
"You don't need to apologize. Honestly, being trapped in a place like this has me pretty on edge too."
"I understand. I heard that even veteran hunters have less than a ten percent survival rate in a Dungeon Mutation. Maybe it's only natural that people start losing their minds."
Han Seo-ah clutched the bag of food tightly against her chest.
"Seo-ah, aren't you scared?"
At my question she gave a bitter smile and shook her head.
"Of course I am. We don't even know if we'll still be alive tomorrow. I act calm on the outside, but honestly my legs are shaking every second."
Her face looked thoroughly worn out.
"Let's head back. If we stay out too long, Baek Do-yoon might lose it again."
"Yeah. You're right. Let's go."
The two of us walked side by side toward the cabin.
That was when it hit—an enormous surge of demonic energy.
My head turned toward it on its own. Far off, from the castle where I'd predicted the boss would be, a black current of energy was spreading wide, blotting out the sky.
The boss.
Something had definitely gone wrong over there.