The Succubus's Daughter
Before my eyes, scenes from my past flashed past like a kaleidoscope. As I felt my scattered consciousness returning, I looked around and realized I was lying naked inside a tank. What? What on earth had happened?
I sat up and looked ahead. A girl was standing there.
“You possess quite sufficient lewdness, you know~ I also like how friendly you are toward other races~”
“Uh, who are you?”
“Hehe, curious about who I am~?”
When I nodded, the girl gave a coquettish smile and spun once on the spot. In that single turn, something impossible to believe even after seeing it with my own eyes occurred. A girl with purple skin, membranous wings, and horns sprouting from both sides of her head now stood before me.
“Ta-da~”
The girl spread her arms wide in a playful gesture. On her lower abdomen was a pattern shaped like a uterus, lines stretching outward from a central heart. Behind her hips, a tail tipped with a heart shape swayed gently. Her ears had grown longer too. Were there really monsters that resembled humans this closely?
‘Is she a succubus, by any chance?’
‘What is that?’
‘A monster from ancient legends. They were said to have gone extinct long ago, but perhaps a few individuals remain?’
When I showed no particular reaction, the girl puffed out her cheeks and spoke in a sulky voice.
“Hmph~ That reaction is so boring. You’re supposed to look more surprised. That’s what makes it fun~”
“Oh, I’m very surprised.”
“Well? Aren’t my horns cool~?”
The black horns curving upward from near her temples were indeed impressive. When I nodded in agreement, her mood seemed to improve. The succubus approached with a light sway, red eyes sparkling as they met mine.
I realized my mistake too late and tried to close my eyes, but it was already too late. My body refused to move again.
Ugh. Just what is this power?
‘According to legend, succubi absorb a person’s vital energy and wield special powers. This must be one of them.’
‘Instead of just explaining, please find a solution.’
‘How can I when I have no information?’
‘Ugh.’
The succubus gave my frozen upper body a gentle push, laying me down once more. She hummed cheerfully as she spoke.
“I never imagined I’d meet a suitable woman in a place like this~ There were no females who met the conditions, so I couldn’t increase my kin. Could this be fate?”
“What are you even talking about…”
“You! Become my daughter!”
The succubus placed her left hand on her hip and pointed at me with her right. The statement was so absurd and meaningless that words failed me.
‘Are all succubi this willful?’
‘I already told you I don’t know.’
The succubus moved the hand that had been pointing at my face, grabbing my breast and kneading it as she continued.
“Don’t worry, just sleep deeply. When you wake up, a brand-new you will be waiting~”
“Wait. You haven’t even asked for my opinion…”
“Aww, it won’t be bad for you either~ Now, let’s do the nose~”
The moment her left hand covered my eyes, an overwhelming wave of drowsiness crashed over me. I struggled to stay conscious, but when her right hand touched my lower abdomen, I lost consciousness completely.
In my fading awareness, I felt myself repeatedly drifting awake for brief moments before sinking back into sleep. It seemed the same for Master; there was no particular reaction from her.
I had no idea how much time passed while trapped inside the tank, but my temples itched and my lower abdomen burned with heat.
When I fell asleep again and woke once more, faint voices drifted in from outside the tank.
“This is… no…”
“Finally… my… kin…”
My flickering consciousness made it impossible to hear clearly, but I could tell the voice belonged to that succubus. After exchanging a few more words, they lifted the tank and carried it somewhere. Feeling the swaying motion, I drifted off again.
The next time I briefly woke, I sensed I was submerged in cold liquid and that something was connected to my nose, mouth, and various points across my body. Even while submerged, I could hear a voice as I struggled to force my blurry eyes open.
“Test subject Q-B has opened her eyes.”
“Hmm. Any changes?”
“We’ve confirmed a change in the pupils. They’re turning red.”
“So it wasn’t unique to her after all. A racial trait of succubi, then? Be sure to record it.”
“Yes. There’s also another request to investigate the parasitic organisms living in the test subject’s body.”
“Again? The mutation isn’t complete yet, so tell them to wait. No matter how rare the specimen, we can’t afford to handle our only test subject roughly.”
In my hazy vision, I could faintly make out a white-haired man and a younger man conversing. The white-haired man must have noticed me watching them with half-lidded eyes, because he approached the glass tank, examined me, and spoke.
“To think I would witness a succubus breeding scene in my lifetime. I am endlessly delighted. The angel Elisha, both a high-grade dairy cow and a mare. Whether you are an Abaddon Queen’s host or whatever reason brought you sneaking into this laboratory, none of that matters. The only thing that matters is that you are the crucial test subject chosen by her—the last remaining succubus on the continent—to become a new succubus.”
The old man in a white coat, leaning on a cane, wore a bizarre smile that bordered on madness.
“In any case, this laboratory is my castle. I have no intention of reporting to the higher-ups, nor do I want any interference. Oh, and you even won as a mare in the human-horse racetrack I operate to fund my research. Hehehe, thanks to that it was easy to falsify the records so it appeared you volunteered as an excellent mare.”
It seemed Master’s assumption that each facility operated independently had been correct. I tried to lift my hand, but something held it in place and it wouldn’t move.
The old man continued manipulating the console as he spoke. This grandfather really did talk a lot.
“In this modern age, legendary beings like succubi no longer exist, so research was impossible. Finding her after a long search, sealed and trapped, is proof that God favors me. Moreover, she who could not increase her kin due to strict conditions has chosen a woman who happened to infiltrate this place and is turning her into one of her own? This is a divine revelation telling me to complete my research on immortality before I die!”
The young scientist working at the computer behind the passionately shouting old man let out a sigh and spoke.
“Director, we already have results on immortality. And have you forgotten that person’s advice to keep her asleep as much as possible?”
“How could I forget? Hehe, I got a little too excited. Administer the sedative.”
“Yes.”
When the young researcher pressed a button, a heavy languor spread through my entire body. I tried to open my flickering eyes once more, but sleep claimed me by force.
I lost count of how many times I drifted off and woke again. By the time my consciousness finally grew clear, I was able to speak with Master.
‘This cannot be explained scientifically. An unknown power has altered the flesh itself.’
‘Even you don’t know what it is, Master?’
Master barely managed to raise a hand within the narrow space of the large glass tank filled with liquid. The hoses that had been in our nose and mouth were gone, but tubes remained connected to our arms, continuously pumping in some unknown fluid. Master touched the protrusions on both sides of our head.
‘Can you feel them? Small horns have sprouted on both sides of the skull. The nerves and bone are connected, so sensation travels through them too.’
‘That’s fascinating. That succubus also had wings and a tail. Have there been any further changes?’
At my question, Master’s hand moved to our buttocks. What her fingers grasped was unlike the soft tail of the bio-suit; this one had something hard inside.
‘The tailbone has grown. Feel that hard core? That’s the tailbone. I can’t reach our back to check.’
‘So we have two tails now?’
‘No. While we were unconscious, both Slamiu and Tyriel disappeared. Kk, I’m worried about what state those children are in now.’
‘Oh no… It seems we’ve been held here longer than I realized.’
Apparently Slamiu and Tyriel had also separated from Master’s body. A device wrapped around our neck held us fixed in the center of the glass tube, preventing any movement. When I looked around, roughly five researchers were watching Master closely, observing every detail.
The realization that we had literally become a test subject sent a chill down my spine.
“Q-B is calmer than expected, isn’t she?”
“She used to be an angel, right? The combination of angelic obedience and succubus lewdness… Mmm~ I like it.”
“You pervert.”
The red-haired female researcher slapped the back of the head of the man who was pressed against the glass wall, staring intently at Master’s body, and snapped at him angrily.
“Don’t you know Kyubey is also Lady QA’s successor? She carries precious succubus bloodline.”
“Ow! That hurts! Are you going to take responsibility if my precious brain cells die?”
“Stop talking nonsense and quit staring at other women!”
“Ack! Stop hitting me! Why are you so violent for a woman!”
The pair bickered like a comedy routine until another male researcher intervened and they finally calmed down. The man who had been thoroughly beaten shouted as he retreated.
“Damn it! Just wait until tonight in bed! I’ll make you regret it!”
“Hmph! Premature ejaculator!”
“Alright, alright. Save the lovers’ quarrel for the bedroom and focus on the experiment. We need to run side-effect tests before replacing the blood, so start by collecting blood samples.”
Watching them, Master opened her mouth to speak, but the liquid filling her lungs prevented any sound from escaping. Noticing the way her mouth moved, a blonde female researcher pointed toward us.
“It looks like Kyubey wants to say something?”
“Leave her. She can’t speak right now anyway.”
“Still, Lady QA’s youthful figure was less arousing, but Kyubey’s body is so voluptuous it’s incredibly hot. She looks exactly like the succubi from the legends.”
“You shut up too. Honestly, men let their lust control their brains…”
The man who had been grumbling after getting hit manipulated the controls in front of the glass tank, sending a mechanical arm toward Master. After Master swatted it away several times and it kept returning, the man spoke with clear difficulty.
“Can’t we just extract through the connected hose? Kyubey is resisting quite strongly…”
“That sight would be too large. Hey, Kyubey. It’s not dangerous, so could you stay still for us?”
When Master shook her head from side to side, the man scratched the back of his head, looking troubled. The blonde researcher spoke up.
“Haven’t you all handled test subjects before? Just put her to sleep and proceed.”
“But I don’t want to get on Kyubey’s bad side… She’s humanity’s hope, after all.”
“Ugh, then make a deal with her.”
“Oh, that could work. If you cooperate with the experiment, we’ll grant you a little freedom. How does that sound?”
Hearing his offer, Master spoke internally.
‘What does “a little freedom” even mean when they’re treating us like a test subject?’
‘Exactly. How much freedom are we talking about?’
‘At the very least, it would be nice if they removed this suffocating restraint.’
When Master pointed at the device restraining her neck and moved her mouth in an exaggerated manner, the man nodded.
“You want that removed? Fine. Then you’ll cooperate quietly with the experiment, yes?”
Master nodded and remained still. The mechanical arm approached her arm, attached itself, and inserted a needle. Through the transparent hose attached to it, blood could be seen flowing out.
But the color of the blood was slightly strange.
‘Doesn’t the blood look a little purple?’
‘Oh, it really does. Just a moment…’
A short while later the mechanical arm withdrew. The puncture wound on the arm healed instantly.
“I’ll release the device now, so stay still.”
The device around our neck was removed, along with the cable connected to the port at the back of our neck.
Oh, right. The implant had been there too.
While Master examined the blood, I moved our body this way and that, testing it. The joints moved with surprising smoothness. Ooh, I could even bend backward far enough to grab my own feet. As I tested our new flexibility, I felt intense stares. When I turned my head, the three male researchers were watching in open-mouthed fascination.
Hmm. Posing naked like this must have been too stimulating for them.
When I bent at the waist, lowering my upper body, my lower abdomen came into view. Where a flower-shaped tattoo had once been, there was now a small, hollow heart surrounded by several lines.
It looked like a miniature version of the pattern that had been on that succubus QA’s lower abdomen.
‘An unknown substance is flowing through the blood. That’s why it appears purple.’
‘It feels like I’m gradually becoming less and less human.’
‘So this is the process of becoming a succubus… I don’t know what this substance does, but it seems to be accelerating the mutation.’
‘Could it be related to the fact that we’re fine even without breathing?’
‘That seems to be the logical conclusion.’
I stopped stretching and curled up quietly. The researchers who had drawn Master’s blood discussed various matters among themselves and continued their work. The experiment dragged on longer than expected. Growing bored with simply watching, I dozed off.
I woke to a strange, intense pain spreading throughout my body. Looking toward the source, I saw that red-tinged blood was being drawn out through the left hose while dark purple blood flowed in through the right.
The pain seemed to come from the forced movement of blood. When I relaxed my curled posture, Master spoke.
‘You’re awake? You certainly sleep well even in a situation like this.’
‘It was too boring. Is there really no way for us to escape?’
‘For now, we can only cooperate. Tyriel is gone and they’ve already discovered our existence. They won’t let us leave easily.’
‘Ugh.’
Still, why did she keep handing over control of the body? Was there some reason?
‘Why do you keep giving me control of the body?’
‘I’m busy simply observing the physical changes. The mutation that had been progressing slowly has accelerated dramatically ever since they began purifying and exchanging the blood.’
‘You mean this purple blood.’
‘The structure is similar, yet it still contains an unknown power. The mitochondria within the cells have mutated and are producing that power. The mutated erythrocytes turn purple because of it.’
Hmm. I didn’t really understand mitochondria, but it seemed that power was accelerating our transformation into a succubus. They were further speeding it up by extracting the remaining red blood, mutating it, and re-injecting it.
‘Look at the skin where the hoses are connected.’
‘Oh, it really has turned purple.’
‘It appears a succubus’s natural skin color is purple. It’s spreading further.’
‘But that succubus QA was white, wasn’t she?’
‘There must be some method. For now, there’s nothing we can do but wait.’
Under the watchful eyes of the researchers, the tedious wait for the blood exchange to finish continued. The boring procedure only ended after every inch of our skin had changed to a pale purple. During that time, small wings had sprouted on our back and our horns had grown slightly larger.
Ooh. The sensation of moving these wings is incredibly strange and wonderful.
While I floated in the liquid, flapping the small wings playfully, one of the researchers spoke.
“We’re going to put you under again. We’ll also be performing a somewhat dangerous surgery, so I’m informing you in advance. Still, don’t worry. The director will perform it himself.”
Hmm. Just when would these experiments end? A dangerous surgery made me a little anxious.
‘What do you think this dangerous surgery is?’
‘Who knows. At this point I just want it all to be over. If succubi are truly close to immortal as the legends say… there’s nothing to lose.’
‘That immortality the old man mentioned earlier.’
While I conversed with Master, the sleeping agent that had been injected forced me into unconsciousness once more.