BAD ENDING 001 — Slave Walker Sonia 4

Huh... why am I here...?
The hazy, fog-like euphoria that had filled her mind cleared just a fraction. A cold, sharp sense of wrongness slid down her spine like an ice pick. This wasn't right. Something was terribly, fundamentally wrong.
Her decision to come here. Meeting the pilot named Peko. Climbing into this machine of her own free will. Every single step had been a meticulously laid trap — her instincts screamed it at her like a raw, wordless cry.
But it was already far too late. The time had come to pay the price for trusting a stranger's kindness so easily, so foolishly.
Sonia had already been set on the rails of a destiny called Slave Walker Sonia, and the chance to thrash free of that track was no longer hers to take. Before any spark of resistance could even catch, a colossal wave was already rising to crush it flat.
"Ahik…♡"
Before the ember of defiance could so much as glow, a powerful, overwhelming tide of pleasure crashed over Sonia's entire body as if laughing at the very idea of resistance.
From the moment she had boarded the Walker, a translucent control core had occupied the deepest, most sensitive reaches of her pussy without a single gap, feeding her a constant stream of minute sensory signals.
Peko, seated in the cockpit, did not miss the fleeting hesitation and flicker of resistance in Sonia's voice.
A slender finger moved toward the glittering pink Reward button on the control panel. There was no hesitation. With cold eyes, Peko confirmed the faint tremor in the brainwave graph on the instrument display — then pressed the button all the way down, hard.
"Hwaah… ahat… haaa…?"
From the control rod of the core, buried so deep it pressed against the entrance to her womb with an alien fullness, a pleasure pulse erupted that made everything before it feel like nothing.
This was no mere mechanical vibration. It was a pure current of ecstasy, fierce enough to scorch the nervous system itself. The wave of pleasure shot up Sonia's spine like a lightning strike and slammed into her brainstem without mercy.
The faint sense of wrongness and the questions that had just begun to surface — her pride as a hero, her last scrap of will to resist — all of it melted away without a trace, drowned in an irresistible flood of pleasure.
Her mind burned pure white. The only thing left in the world was the sensation tearing through her body.
"Slave Unit. You haven't forgotten what you're supposed to say when you receive a reward, have you?"
Peko's cold, emotionless voice rang through the headset against her ear. Sonia's body, already half-consumed by pleasure and gasping for breath, produced a perfect conditioned response to that voice.
Regardless of her will, a body already retuned to the new rules reacted first.
> Educating Slave Walker Unit on proper mindset toward Master.
> First: state your duties as Master's Slave Walker Unit.
As the system's voice rang out once more, new sentences began to be forcibly carved into Sonia's emptied mind. They were not her own thoughts. They were truths injected from outside — truths she could not refuse.
I am Slave Unit… Sonia. A living component that helps pilot the Slave Walker… I submit absolutely to Master, who manages me when I can do nothing on my own…
A biological part that moves according to the signals from the controller Master holds… That is me — Slave Walker Unit Sonia. My will is Master's will. My pleasure is Master's command.
"Slave Walker Unit Sonia… always obeys Master's instructions. Does not… refuse Master's orders. Carries out… the control unit's directives without fail."
Every time the glittering colored glass before Sonia's eyes burst like a flash of light, the program's voice forced new rules into her empty mind — permanently. Beautiful, lethal shards of light were reconstructing every thought she had.
> Confirmation complete. Current Ego Suppression Level: 1.
> Settings may be changed to Ego Suppression Level 2.
> Permanent command imprint will be performed next.
> Fixation processing and modulation should be handled in the dedicated management room.
Ego Control Level 2. That was the process of turning someone into a complete doll — every personal thought circuit suppressed, reacting only to instructions with the mechanical obedience of a docile robot.
Of course, there was no real need for that with Sonia as she was now.
Her mind had already been perfectly twisted open at Level 1, and she was accepting her position and code of conduct as a Slave Walker Unit willingly — so naturally it was almost effortless. Her body had already learned that the pleasure of submission was far sweeter than the pain of resistance.
The mind-control crystal fixed firmly to Sonia's forehead began to analyze the newly docile brainwave patterns of a Sonia who had accepted her new self, sinking deeper into her skin as if putting down roots. She could feel the cold jewel writhing like a living thing, becoming part of her.
> Full settlement of mind-control crystal confirmed.
> Initiating Slave Walker Unit mental reboot.
…Tick… tick-tick-tick…
The crystal, which had been quietly glittering with a small light, went dark in an instant — as if its power had been cut. Sonia's consciousness sank with it into perfect darkness.
And a moment later, it lit again with a white light far brighter and clearer than before. Just as an old computer reboots onto a brand-new operating system, Sonia's consciousness blacked out for a moment — then came back online under an entirely new OS.
"Ah…♥"
Her eyes opened slowly with a rapturous moan. Not a trace of the earlier confusion or anxiety remained in that gaze. Only a clear, pure light of obedience filled them.
"Looks like everything's done. Good work, Sonia."
At Peko's low voice, Sonia bowed her head in a perfectly tuned posture.
"Yes, Master. Slave Walker Unit Sonia is ready to follow Master's instructions."
A completely transformed way of speaking. This was no longer the awkward polite register mixed with hesitation and shame. It was a perfectly modulated announcer's voice, with no emotional turbulence at all. Peko could feel instinctively that Sonia's entire atmosphere had changed from the foundation up.
There was no guilt. Peko's mind held only the cold satisfaction of having successfully installed a rare, high-performance new component.
"Good."
Sonia kept her head deeply bowed, focusing every nerve on the sensation of the control core shifting minutely inside her body.
A Slave Walker Unit has to stay connected to the control terminal at all times, after all…
Whenever the core tried to pull back even slightly, she clenched her soft inner walls hard around it, desperately following its movement so she wouldn't lose it. The thing Sonia had once thought of as a foreign object was now a sacred link binding her to Master.
Crack, crack! Sonia's pupils still shone with undimmed vitality.
This procedure was not meant to destroy the mind and leave a broken wreck. It simply replaced the thought circuits — overlaying the unstable identity of a D-class hero of Sky City with the solid, eternal new identity of Peko's Slave Walker Unit.
"All right. A program will start now to teach you the absolute rules of a Slave Walker Unit, so open your mind wide and accept everything. Understood, Sonia?"
"Yes, Master."
Master's instructions…♡ To me, a worthless biological part who can't do anything unless Master pilots me… going this far…♡ For Master, there is only obedience…♡
Sonia had begun to perceive Master's orders and pleasure as completely identical. A command was pleasure. Pleasure was a command. The act of submission itself had become her reason for existing — and her greatest joy.
"Slave Walker Unit is ready to receive permanent commands, Master. Please initiate the Slave Walker permanent imprint command program."
"Please process the interfering original ego, Master."
Sonia's voice was restrained of emotion like a machine's — but her body responded with the opposite honesty. Hot, sticky love juices flowed without pause between her full thighs, soaking part of the seat, while her soft flesh clenched the control core even harder, never releasing it for a single moment. Above the suit that wrapped her chest, two nipples stood stiffly erect, flaunting their presence.
> Slave Walker Unit — permanent command imprint commencing.
With the system's declaration, a robotic arm descending from the ceiling removed every lens covering Sonia's eyes in sequence — even the yellow contact lenses she had been wearing for visual protection. Then cold, unnerving mechanical fingers forced her eyelids open and locked them firmly in place so she could not resist. Her luminous golden irises were left bare and defenseless, ready to accept everything.
"Yes. Slave Walker Sonia submits to the procedure per Master's instructions. Please perform the permanent command imprint."
Permanent… command…? Something that will remain in my heart forever, imprinting only the thoughts of a Slave Walker Unit… Abandoning every other possibility, and being reborn forever as Master's Slave Walker Unit… Something like… that…
"It's the best… Masterrr…♥"
The moan that burst from Sonia's lips was not pain — it was pure rapture. This moment of discarding her past self and being reborn as something new was the moment she had been craving from the deepest reaches of her unconscious.
I'm sorry, Sonia. Goodbye, Hero Sonia… And… welcome, Slave… Walker Sonia…♡
"Slave Walker Sonia! From this moment forward, abandons every other possibility and swears here and now to live only as Master's Slave Walker Unit… aah…♡"
STATUS: Fusion preparations complete
ACTION: Initiating fusion…
As if answering her fervent declaration, the robotic arm pushed the crystal embedded in Sonia's forehead deeper with a firm press. Instead of hard resistance, a strange warmth spread through her.
The crystal's surface melted, transforming into something like liquid metal, then broke apart into hundreds of millions of nanomachine particles that began seeping in through Sonia's skin.
Rather than pain, a warm, gentle sensation spread through her entire head.
The silver nanomachines passed microscopically through her skull, settled into every fold of her brain, and physically bonded with her nerve cells — melting into perfect unity with her mind.
With this… I become… completely… Slave Walker Sonia under Master's management… Forever…
Sonia's consciousness faded one last time, sinking into joy.