Symbiotic Slime
I dreamed.
In the dream, I saw Arun drenched in blood.
My childhood friend, who had died long ago, spoke to me in a desolate voice.
“You said ‘tomorrow,’ didn’t you? And you were right. I… I was going to let you go the next day. When I saw you coughing, I realized we’d both caught the plague that had swept through the village. Since we were both going to die anyway, what was the point of selling you for a bounty?”
A trace of resentment crept into Arun’s words.
“But you could have escaped at any time. You could have cured the illness whenever you wanted. Instead, you pretended to be trapped and enjoyed it. You never healed my sickness, and you escaped alone. You played with me, Kaira.”
I wanted to say no, but my mouth wouldn’t open.
It felt as though someone was pressing down hard on my lips and throat, preventing any movement.
Behind Arun’s figure, the silhouettes of the villagers from the market in my hometown appeared—those who had died. Their forms flickered faintly in the darkness, their faces unrecognizable. It was a dream, after all; I was simply imagining the ghosts of the dead as I pleased.
“Kaira. You are……”
Arun’s form began to distort.
It turned viscous, melting and collapsing to the ground. All that remained was a transparent, weakly fluorescent mass—sticky yet soft, containing a small, multicolored nucleus within.
“You’re mine now. Mine. Mine… mine.”
The melted Arun lunged at me, and in that instant, I woke from the dream.
Beyond my vision, tinged with translucent pink, Naixon’s face came into view.
He looked slightly flustered at the sight of the ruined laboratory, but his expression turned concerned when he saw me collapsed on the floor. Embarrassed by my body, soaked in fluids and urine, I tried to wave him away, but my hand wouldn’t move. My mouth wouldn’t open either.
While I struggled to move my body, my mouth suddenly opened on its own. I hadn’t even thought of speaking.
My body spoke with my voice, yet in a cheerful tone that didn’t suit me at all.
“Hello, Master! I like you so much, Master! I love you!! Thank you for creating me. I finally have a body!!”
“Uh…… Master? What do you mean by that?”
“Master, Master. It’s me! The magical creature you created!!”
My arm moved on its own, pointing above my head—at the mass of protoplasm that was arbitrarily changing its iridescent colors to express joy, the thing that was freely manipulating my brain.
Beyond the dim lighting cast by a few candles, the clatter of tableware echoed. My hands clumsily handled the utensils, scooping up roughly chopped meat and vegetables into my mouth, while my mouth chewed and tried to swallow. None of it was my doing.
It was the work of this magical creature, still perched on my head like a hat, extending its tentacles through my eyes and ears into my brain to control me.
“So, you’re saying you’re dominating that girl’s body right now? By controlling her brain?”
“Yes, that’s right. But wow, food really is delicious! Master, Master, thank you!!”
The signals of taste from my tongue flowed properly toward my consciousness as well. Just as the slime had said, the food was delicious. Naixon had lived alone for a long time without servants, and being an alchemist probably helped—cooking was a form of chemistry, after all.
While my body devoured the food greedily, repeating how delicious it was, Naixon barely touched the meal he had prepared himself. Lost in thought, he eventually spoke slowly.
“It’s a question I should have asked from the beginning…… So, what happened to Karin? Has she been extinguished?”
“Karin……? Who’s that……?”
My body asked Naixon with a blank expression, then immediately changed its look as if it understood.
With a strange smile, it even muttered to itself.
“Right…… It was Karin until now.”
Finishing its mutter, my body smiled brightly and answered.
“Don’t worry about Lady Karin. She’s still watching everything right now. Though, of course, she can’t move her body at all without my permission.”
The slime said this while winking with one eye, then added something chilling.
“But if Master wishes, I can erase this woman anytime! Hehe, I could just digest her brain and eat it, then take her place. Shall I do that, Master?”
‘Eek…… Ah, no……’
“No, don’t do anything like that…… I’m asking you.”
“Yes, Master asked me! I won’t do it, Master! Um…… Then, is it okay to stir her brain, erase this woman’s ego and intellect completely, and turn her into a female slave to help with Master’s work?”
‘I-I don’t like that either……’
Naixon sighed.
“As an order, do nothing beyond controlling that child’s brain or body. Unless I specifically ask for something more. It’s a borrowed body, so there must be no aftereffects.”
“Understood, Master, Master!”
Naixon seemed quite taken aback by the bizarre ethics of the being that had taken over my body. He was probably thinking he needed to teach it human societal morals.
“Oh, right, right, Master. This woman may not have much of a figure, but apparently her face was considered quite pretty. She’s a whore who’d spread her legs for anyone, and a perverted female who enjoys being forced and hurt. Would you like to try her too, Master?”
Naixon gave a bitter smile at my body, which was spouting vulgar words completely unlike when he had first seen it.
“It’s fine. Perhaps because of my age, I don’t feel such desires. Besides, Karin’s appearance looks too young, so it feels wrong. It would be like doing something terrible to a daughter. If you’re really curious about that body developed as a whore, why don’t you use it yourself when you return to the room?”
“I will, Master!! As you command, I’ll masturbate with this female’s body!! Until her mind is completely broken!!”
Naixon shook his head gently, as if he thought communication was impossible after all.
To ‘me,’ who had already greedily finished all the food and was now restlessly crossing my legs out of boredom, Naixon spoke.
“When you took over the body, I’ve cleaned up the laboratory to some extent after Karin’s rampage, and prepared a sleeping bag so you can stay comfortably. It was originally prepared for Karin, but…… since I borrowed Karin for five days, stay there during that time. As you’ve seen from Karin’s memories, entering other laboratories recklessly is forbidden.”
“Yes, yes!! Understood, Master!!”
My mouth answered like that. Naixon stared at me for a long while, then spoke with a slightly hesitant expression.
“I was half in doubt, but…… it’s about half a success. Thank you. As expected of a magic user, your sensitivity to magical creatures was high……”
Seeing his expression filled with deep satisfaction despite being lost in thought, I had a feeling I wouldn’t easily escape from Naixon’s house, which hid a gentlemanly yet alchemist-like madness.
I walked leisurely, as if taking a stroll, down a corridor lined with poorly maintained private laboratories on both sides, filled with the smell of chemicals. The thin soles of my sandals creaked against the wooden floorboards with every step.
Though it wasn’t by my own will.
On the way back to the laboratory where the slime had been confined, and which had now become my place to stay, my mouth whispered.
“Karin…… No, since it’s just the two of us now, I’ll call you by your real name. Lady ‘Kaira.’ There’s too much information, so I haven’t fully contacted and analyzed it yet, but your knowledge has all sorts of interesting things. Your past life, strange abilities…… Well, since it’s the first body I’ve ever entered, I’m not sure if it’s particularly more interesting than someone else’s mind.”
To hear my real name called after almost a year, and in my own voice at that. And the one calling it wasn’t a person, but an artificial creature created through alchemy. To have my past exposed to such a suspicious being—it left me with complicated feelings.
“The Creator actually only gave me the brain-eroding function as a plausible hypothesis, but you knew from the beginning that thoughts reside in the brain, didn’t you? Thanks to the knowledge you gained from that place called Earth. That’s why you resisted so much when I tried to enter. Struggling cutely, saying you didn’t want to be a host…… Haah…… It’s hard to hold back.”
From what was just said, I could tell.
It was clearly twisted. This slime…… was incredibly twisted.
Instead of conveying its intent mentally, it deliberately spoke aloud, letting me hear it in my own voice—that alone already showed it.
It was partly my fault. Before parasitizing me, it had been a creature without intellect. The first intellect it encountered…… meaning my mind, it learned various things from it and ended up with a twisted heart like mine.
“Nn…….”
A cute sound escaped my mouth. It was the sound of pushing the thick iron door of the laboratory where I was to stay.
Even with the slime attached to my head like a hat, it didn’t make me stronger. I had always had a slender body, so adding the weight of something like the slime wouldn’t make such a heavy door slide open easily.
“The Creator must have had quite a hard time cleaning up the laboratory. Well, about half of it was because Lady Kaira struggled in vain, and the other half was because Lady Kaira so generously pissed herself.”
To be mocked by an unknown creature. If I could move my facial muscles, I would have been making a displeased expression.
“Well then, Lady Kaira, shall we begin?”
Feeling it was definitely not going to be anything good, I reflexively asked in my mind.
‘Begin…… what……?’
“The Creator explained it, didn’t he? I have a purpose for being created. Primarily, to help humans with easy contraception, and secondarily, to understand the human brain in more detail. Lady Kaira has become the test subject for that.”
‘Th-that’s true. So?’
“Even if it’s not professional, the rudimentary knowledge you brought from your previous world about the brain and the human body is precious. The people of this world wouldn’t believe you no matter what you say, but I, who can read the brain directly, know that the knowledge from your old world is true. So, I should conduct various experiments with it. After all, I was created for the Creator.”
‘Hii……?’
In that moment, a strange sensation ran thrillingly through my entire body.
Something like a whip from the crown of my head to my toes—not quite pain, yet not quite pleasure either…… It was a peculiar sensation that could only be felt if someone was directly kneading the brain and injecting sensations into it.
“Good. It seems the sensations throughout the body are properly under control. You see, as you know, the reason and memory and thinking ability I’ve gained are all borrowed from Lady Kaira’s brain. So if Lady Kaira resists sincerely, it becomes difficult for me to experiment freely. Therefore……”
In that instant, without any warning, without foreplay, caresses, masturbation, or penetration—without anything at all—an orgasmic ecstasy that pierced through my spine tore through my entire body.
‘Hhhk?! Ah, uwaa!? Et♡ Uut♡ Eunghat?! Haaaaaaaah!?!?!?!’
“Just as I serve my Creator, Naixon, during the experiments, Lady Kaira must serve me as your master as well.”
‘Hhehe…… Uu, ung♡ Ah, aah…… Uut, uuut……’
I couldn’t even retort in my mind, only barely managing to form fragmented thoughts amid the afterglow of the climax that poured down like a downpour.
“Lady Kaira is a pervert who gets excited and masturbates while imagining herself committing suicide, being executed, raped, or even rotting as a corpse, isn’t she? You’ll definitely feel good. Falling below human by having your brain eroded by me, that is.”
The voice of the creature whispering through my mouth dug into my ears, deep into my mind.
With complete control of my body taken away, unable to move even a single finger, I could only stand there motionless, feeling the sensation of sticky, warm fluids trickling down my legs, climaxing endlessly.