Chapter 40: Development (2) [R-18]

Mammary gland development stabilization: Confirmed.

The domes were slowly lifted from Seojin’s breasts. A clear fluid beaded on the tips of her still-swollen nipples, dripping down one drop at a time.

Seojin exhaled, her eyelids fluttering. The inside of her chest still throbbed, and even the air brushing against her sensitive flesh was electrifying.

Transitioning to the next phase. Initiating autonomous contraction induction and internal elasticity reinforcement protocol: Alpha-2.

Her breasts had been milked, squeezed until they secreted fluid, yet watching it did nothing to quell Seojin’s arousal.

But the deeper response was only just beginning.

Click—

The lower part of the chair moved smoothly. A thin probe rose carefully from beneath her, minutely parting the entrance to her sex.

“…Ngh…”

Biting her lip, Seojin’s eyes trembled.

Internal pressure reading: Normal. Small dose of medication automatically administered.

A subtle prickling sensation, followed immediately by a warm wave spreading through her insides. As the drug took effect, her inner walls began to tighten in sync with the machine’s faint vibrations.

Response sensitivity rising. Contraction rate increased by 19%.

“Ah… Ah, haah…”

She tried to hold back, but a tingling sensation spreading from deep inside made her hips buck involuntarily. The flesh of her pussy reacted with raw sensitivity, clenching as if it were being softly sucked in by the machine.

Test probe insertion.

The thin probe brushed gently against her core before sliding deeper with unerring precision.

“Hahng…!”

A breath burst from Seojin’s lips. It was only a small machine, but every time it moved, her insides twitched and tightened as if alive, her muscles clenching with a reflexive elasticity, as if trying to expel a foreign object.

Data report. Receptive cavity elasticity recovery: 112%. Maintaining a state of contraction tighter and denser than the female average baseline.

“…Hnngh… So, that’s…”

She muttered to herself, then threw her head back. More than anyone, her own body knew the machine’s assessment was correct.

Entering repetitive stimulation protocol. Stimulation intensity increased to level 2.

Following the calm announcement, the probe brushing against her inner walls began to rotate, minutely, from side to side.

Her body had never taken anything thinner than a finger. Now, the machine explored her from angles she never knew existed, pushing and pulling with excruciating slowness.

“Haah… Ah, no…!”

Her slick insides parted softly, yet clung with a sticky tightness. It was an ambiguous sensation, neither clenching nor pushing away. The strange tremors made her forget to breathe.

Autonomous contraction rate: 126%. Confirming additional response data.

Beep— Click.

The probe at the base of the chair paused. Then, a thicker form—one simulating the size of an actual man—rose silently into place.

It didn’t enter immediately, as if mocking her, teasing her readiness to accept it.

“Ah… Uuungh…!”

As if in response to Seojin’s pleading whimper, the soft, feminine machine voice sounded again.

Next phase. Commencing measurement of receptive capacity via practical stimulation.

“…Ah, haah… Ah, ahh…!”

Unconsciously, Seojin arched her hips. The tip of the device, a rounded shape like the head of a cock, nudged against her entrance, slowly stretching her open.

Its size was starkly different from the soldiers who had been inside her. It was so much thicker, so much harder.

Currently accommodating object: Type-C (43mm diameter). Clenching response: Excellent. Internal grip: 91.7%.

“No way…”

But she could feel it. The thickness had seemed impossible at first, but her body wasn’t rejecting it. Instead, it was slowly embracing it, adapting.

Internal temperature, mucosal sensitivity, and autonomic muscle response: All excellent. Accommodation phase initiation: Confirmed.

The machine’s stimulation was no longer a simple in-and-out motion. It had become a deep thrumming that vibrated through her entire body from within.

“Aah… Nng… Haah…”

Her soaking wet pussy was already flushed and swollen, and Seojin twitched her hips, as if matching her rhythm to the machine’s movements. Her body flushed red, her breaths growing thin and shallow.

Her gushing climax revealed the limits of her body.

Receptive pathway training: Complete. Contraction response coefficient: Top 2%.

At those words, Seojin let out a long, held breath, her expression one of overwhelmed, joyous ecstasy.

Initiating next phase. Inserting Type-D stimulator. Diameter: 49mm. Extended vibration function included.

“Ngh… Uuungh, ngh… Haah…!”

Her senses were already past their limit. But the device, replaced without mercy, was even larger.

Seojin could no longer even properly register that something was pushing inside her. Only a faint awareness that it was too big lingered at the edge of her consciousness.

With a wet squelch, she slowly stretched open, the device pushing into the new space. This time, it expanded as it entered, moving deep within her.

“Hh… Ah, aaaahh!!”

A sound that was half scream, half moan tore from her throat. Her body had already surrendered completely. Upon that surrender, the machine bestowed nothing but pure, calculated pleasure.

Inner wall response rising. Re-adjusting elasticity within the vaginal mucosa.

A repeating cycle of vibrating contractions and suction left Seojin unable to keep up. The sensation flooded up her spine to the nape of her neck, and her mind went completely blank.

Her mouth was open, but no words came out. Only moans, repeating regardless of her will.

“Haah… Hwaang… Ah, aht… Hnngh…!”

And then, with a long, slow pull—

The device pulled out, as if wringing her from the inside. She felt as if her insides were being drawn out with it. Her pupils trembled. This time, she couldn’t even make a sound as her body seized in a final, shuddering convulsion.

Receptive pathway recalibration: Complete. Current clenching response: Top 0.8%.

Seojin’s chest pounded. The woman she used to be would have found this unbearably shameful, but the woman she was now reveled in it.

There were no more machine sounds in the room, no more stimulation to drench her in pleasure.

But the sensations remained.

A faint tremor still echoed deep in her chest, and her inner thighs pulsed, swelling and tightening in a way she had never willed them to before.

She was merely sitting in the chair, yet her body kept vibrating subtly, poised in anticipation, as if waiting for something more.

[…and with that, the 18th TS Conversion Trainee Completion Ceremony has concluded.]

From the far reaches of her consciousness, an announcement from a speaker trickled in like a distant radio broadcast. The time was now midnight. It was an announcement that her life in the training center—this ordeal at the end of which her “happiness” was supposed to bloom—was finally over.

Just then, as time seemed to stand still, she heard the sound of a door opening.

Creeak—

The sound cut through the silence. It wasn’t an automatic door, but the sound of friction, of someone opening it by hand. Seojin felt her heart begin to race.

It was the shame of facing the middle-aged man who was supposed to pick her up while she had the eyes of a bitch steeped in pleasure.

And it was also a thrill at the thought of someone—anyone—treating her just as wantonly.

“What’s this? They said they prepared it properly this time, and this is it?”

Her gaze flickered to the doorway. Instead of the worn shoes of a middle-aged man, a pair of polished, high-end dress shoes stepped onto the floor.

And a voice to match them—leisurely and relaxed.

The man who entered the room had messy, golden-brown hair and a collarbone faintly visible through his unbuttoned shirt. The light jacket slung over his shoulder was a luxury brand, but his careless attire made him look like a libertine just kicked out of a club’s VIP room.

He approached Seojin with a casual swagger. His eyes swept down from her face, over her breasts, her stomach, her thighs, and her sex. It wasn’t the gaze of observation, but of ownership.

“What’s with that expression? Having a fun dream?”

Seojin didn’t answer, only stared at the strange man with a dazed look in her eyes.

He slowly reached out, his fingers tracing her jawline before gripping it and turning her head from side to side. His touch was surprisingly light and gentle, but it held a strange pressure, like a hand holding a glass cup just before it shattered.

“For once, Father picked out a decent birthday present. Your looks are my type.”

The man’s lips curled into a smirk. He lowered his hand, his fingers lightly tracing the damp evidence of her “development” on her breast as he whispered.

“But you’re already half-broken. This is going to be so much fun for us.”

Seojin’s eyes moved slowly.

…Who is he?

Her head felt heavy. Her arms and legs were leaden, as if still bound by straps. Even after the experimental equipment had been removed, she couldn’t keep her mind clear for a single moment.

Her nipples were still hard, and the faint, sticky wetness of arousal still clung to her inner thighs. When she blinked, her vision remained blurry, like looking through a dusty lens.

The sound of dress shoes drew near. The voice she heard was strangely bright, light, and flippant—a completely different air from the men she had grown used to at the training center.

With her vision failing, her other senses seemed to sharpen. She could smell the faint scent of cigarettes and something sweet on his breath, and a hint of expensive cologne from the collar of his shirt.

Seojin said nothing.

She couldn’t comprehend the situation, but she felt no desire to ask for an explanation. All she knew for certain was that this man was touching her as if he had every right to.

Translated By: Meher (RaidenTL)

Please do consider subscribing to my Patreon for requests or to get early access to chapters