Monster Girl Development Master.

"Speaker Missy! Behind you! Look behind you!"

Ok?

Klose Koffney's scream abruptly interrupted Missy's reverie. What made her heart clench even more was that her keen senses caught a faint, strange sound coming from behind her—the sound was like greased metal rubbing against each other, and behind her was a metallic object...

Missy turned around abruptly, looking at the creation that embodied her pride, confidence, and hard work. She, along with Klose, the guards, the researchers, and the subjects of the study, were frozen in shock.

To the astonishment of the crowd, the colossal object that had stood silently in the underground palace for countless years began to slowly rotate. Its square body twisted, deformed, contracted, and condensed as it rotated, eventually transforming into a figure about 1.7 meters tall: she wore a maid's long dress with a cold, metallic sheen, her curves exquisite, her features as refined and beautiful as the masterpiece of a top sculptor, yet far from being a lifeless sculpture; her flowing spirit seemed to be infused with a vibrant soul.

The goddess of wisdom... has come to life?!

Not to mention those who already had faith in the Goddess of Wisdom because of the environment of the Kingdom of Thousand Towers, even Missy herself couldn't help but feel this horrified thought when she saw the steel humanoid on the high platform whose appearance and figure were close to perfect and whose golden ratio interpreted the ultimate aesthetics!

But just when they thought this was the greatest shock of the day, and perhaps their entire lives, the steel doll on the stage—[Relic? Eternal Legacy]—stepped down from the platform, stopped in front of Zhuang Sen, gracefully lifted her skirt and bowed, her sweet voice devoid of any artificial electronic tone: "Nice to meet you, Master. This is your multi-purpose, convertible maid, currently named 'Eternal Legacy.' Would you like to change the name?"

Before the words were even finished, the system's unmistakable electronic voice rang out simultaneously: [Relic? Eternal Legacy has been successfully retrieved.]

The inheritance system has been fully developed, and restrictions on inheritance usage have been removed.

The Inheritance Anchoring function has been unlocked. You can anchor corresponding types of inheritances through nests, and monster girls can enter these inheritances through nests.

The inheritance purification function has been unlocked, which can restart damaged, polluted, eroded, and out-of-control inheritances as the currently retained template.

[Inheritance...]

A series of prompts flashed by, including many novel and unique functions, but Zhuang Sen's gaze remained fixed on the mecha girl who called herself a maid. She possessed a lively demeanor indistinguishable from a human, perfectly navigating the uncanny valley, yet the metallic sheen flowing over her skin and clothing constantly reminded Zhuang Sen of the cool transformation he had just witnessed. This combination of her appearance and sweet, captivating voice, uttering statements with a mechanical quality, was simply…fantastic!

Although I don't understand how the relic could be a living "person," well done, Ancient Monster Girl! Mecha Maid! Hooray!

Suppressing his inner elation and excitement, Zhuang Sen tried his best to remain calm and asked, "Hello... Do you have any recommendations for your name?"

The mecha maid maintained her impeccable smile and replied in a meticulous tone, "Searching as requested... Search complete, recommended name: Zero? Manor, Izayoi Zero..."

She listed many options, but they all had one thing in common—regardless of the surname, the given name was always "zero".

Ah, this kind of seemingly mechanical and rigid design, yet secretly harboring a stubborn self, is also fantastic! Monster girls really know their stuff!

Suppressing the urge to reach out and touch him, Zhuang Sen said reservedly, "Then let's call you Zhuang Ling. From now on, I'll just call you Ling."

"Understood, the machine's name has been changed. What does the owner need? This machine can provide you with all kinds of services, including warming the bed, cleaning, cooking, tidying, hunting, and management..."

"No need, there's nothing for you to do right now."

"Understood, now in standby mode."

Zero, maintaining a smile, walked to Zhuang Sen's side and behind him, her hands clasped in front of her lower abdomen, her demeanor meticulous, completely centered on Zhuang Sen, like a devoted maid. This scene made the elites of the Thousand Towers Kingdom, including Missy, feel their hearts bleed, their straight spines unconsciously bending slightly, like dogs with their heads bowed on the roadside.

There were just too many "dogs," and Zhuang Sen was worried they might suddenly go berserk, rushing up to kill him and steal his maid. After all, judging from Misty's previously overflowing pride, it was clear how important Zero was to them; she might even be the core of the professional system—after all, her name was [Eternal Inheritance]. Now, the core had suddenly turned into his maid, a scene like a group of sycophants going bankrupt to lavish money on a goddess, finally earning a glance from her, only to have her immediately change into a maid outfit and pounce on him, calling him master…

That's amazing! Absolutely amazing!

But then again, the belongings were originally his own; this is just normal recycling, how can it be called a cult? This is clearly pure, innocent love! True love!

Most importantly, it seems that the Thousand Towers Kingdom can no longer defeat itself?

The Thousand Towers Kingdom's publicly acknowledged strongest fighting force is the Knowledge Council, led by Missy, but Missy is clearly no match for him; even considering the council's coordinated attack, he can still call upon his beloved Dantalian. As for the clandestine professional system... even Core Zero is on his side, so what is there to worry about?

whee.

Zhuang Sen understood this perfectly, and Missy was clearly aware of it as well. Her face was filled with bewilderment and confusion, and she asked helplessly, "Zhuang Sen, is this what you meant by 'visit'?"

The author says:

Author's Note: My computer is having problems, so this is a draft. I haven't been keeping track of the bounty progress today. I'll start counting it once my computer is fixed.

Chapter 289: She still has to say thank you.

Missy's words sounded somewhat resentful, and Zhuang Sen felt genuinely awkward under her gaze, but that was all. In the end, Zero was originally his, and it was Zero who took the initiative to come to him. He was already being kind by not charging Missy a usage fee in return, so there was nothing to be sorry about.

Thinking of this, Zhuang Sen became more self-righteous: "Misty, I never expected that your 'guidance of the goddess of wisdom' was actually my maid."

Even the usually composed and intelligent Missy was speechless, her teeth clenched. With Zero still standing quietly behind Zhuang Sen, what use was any amount of evidence, no matter how logically sound? Ultimately, Missy remained rational, quickly suppressing her resentment and disappointment at being confronted by the minotaur. She accepted reality and prepared to make amends: "Zhuang Sen, I have a request. I hope you can allow the goddess… Lady Zero to continue assisting our research."

Zhuang Sen had guessed that Missy would make such a request. Regardless of Missy's previous introduction, Zero's state before transformation, or even the effect of [Eternal Inheritance], it was clear that the professional system was closely related to Zero. Now that Zero had become his maid and was going to leave with him, would the professional system that the Thousand Towers Kingdom had painstakingly created have to be abolished?

Although Zhuang Sen understood that Missy and the Thousand Towers Kingdom were pitiful, he still didn't intend to leave his mecha maid outside, especially since it was their first meeting, not to mention that he needed to use the function of the relic, [Eternal Inheritance]! So he shook his head and frankly told Missy, "Zero is also very useful to me, I'm afraid I can't let her stay."

Missy had actually thought of this as well, and she would have made the same choice in her place. However, she still felt uncomfortable and even a little wronged, as if Zhuang Sen had bullied her. Although rationally Missy knew that Zhuang Sen had done nothing wrong, just like that inexplicable feeling of affection, this awkward and wronged feeling was also inexplicable.

Just as the two were feeling a little awkward, the perfectly elegant and versatile maid-type mecha girl appeared to solve her master's problem: "Master, don't worry, the technical support for the [Bloodline Ability Compatibility Adjustment Experiment] doesn't require me to leave my physical body behind. I only need to leave a remote database interface. At the same time, this will allow me to continuously update my own database and optimize ability combinations, making it easier for me to better serve you."

Zero's words sounded like heavenly music to Missy's ears, making her eyes light up. Zhuang Sen, however, immediately looked at Zero: "Doing this won't do you any harm, will it?"

"According to our assessment, the probability of this strategy causing damage to the machine and its owner is less than one in a thousand."

She answered with a straight face, but Zhuang Sen always felt that there seemed to be a change in her expression on her exquisite and perfect beauty. It was only because he had been trained by girls like Mira and Bessie, who were emotionless, that he was very familiar with such subtle changes in expression. And this was his own monster girl. Otherwise, Zhuang Sen would not have been so idle as to pay attention to other people's micro-expressions.

Hmm, you seem happy, so it should be fine.

Zhuang Sen waved his hand and said, "Then let's do it this way. Zero, do you need to prepare any materials?"

Zero shook her head, reached out and tugged at the metallic black and white maid dress, pulling out a clump of silver liquid. The liquid instantly solidified in her palm into a palm-sized cube, exactly the same as her form before she became a maid, only shrunk countless times in size.

"Little Missy, you can contact me as usual once you put this back. However, if this machine is serving its master, the reply may be a little slower."

Zero's affectionate address made Missy's heart flutter. She quickly took the cube Zero gave her, subconsciously ignoring the lewd words in Zero's words. However, Zhuang Sen understood the real meaning. Mecha girls are also monster girls, so... do they have a reproduction module or something?

Zhuang Sen was somewhat expectant, but more importantly, he wanted to talk to Zero about the relics and the monster girls. So he interjected, "Now that it's all settled, Zero and I will head back first."

Although Missy couldn't understand Zhuang Sen's intention, after Zero's miraculous transformation, she knew that now was not the time for Zhuang Sen to tour the place, so she naturally agreed. She even added apologetically, "I've made you come all this way for nothing. I'll introduce it to you after I've tidied it up again."

Zhuang Sen's "generosity" transformed all her previous grievances into goodwill, filling her with gratitude even on a rational level, and causing her to unconsciously speak to him with affection. The researchers and guards around, who had just recovered from their shock, were as astonished as when they saw Zero transform—was this still the [Immovable Great Library]?

"It's alright, this machine can explain the relevant information to its master." Zero's words made Missy suddenly realize the crucial point she had overlooked: Zero had become Zhuang Sen's maid, so wouldn't all of her research have become Zhuang Sen's? The entire Thousand Towers Kingdom's plan, built with the resources of the whole nation, had just been taken over by someone else?

Oh, and even all future research will be Zhuang Sen's, as long as they continue to receive Zero's assistance and guidance, at most trying to separate the core of the entire system from the [Skull of Wisdom]... if they can do that.

……

"Well then, we'll be going now." Zhuang Sen said goodbye to Missy again, considerately not letting Missy, who needed to clean up the mess, see him off. Missy, whose mind was in turmoil, accepted this kindness. Mainly, her mind was also very chaotic right now, not only because of the chaos at the research base, but also because of the feelings that were spreading like weeds.

Following the secret passage back to the surface, since the driverless carriage belonged to Missy, Zhuang Sen planned to carry Zero directly back, which would be faster. However, before he could act, the perfect and elegant maid had already hugged him: "Vehicle mode activated, Master, please wait."

Under Zhuang Sen's astonished gaze, Zero's perfect body began to transform once more. A surging wave of metal emerged from beneath her skirt, transforming into a uniquely styled "car." It had a similar body to a car, but with a retro style reminiscent of Earth around 1970. The front and body lines were sleek, but the interior was completely different. The seats, conforming to the buttocks, gleamed with a metallic sheen, yet felt even more comfortable than genuine leather cushions—no, it felt as comfortable as sitting on a voluptuous body. Even more strangely, the car lacked a steering wheel and instruments, and all the windows were completely sealed shut, leaving Zhuang Sen wondering how to drive this luxury vehicle.

At that moment, Zero leaned close to his cheek and whispered in his ear in a completely calm tone: "Master, this machine has entered vehicle mode. Please drive it as you please."

Chapter 290: Car, such a fast car (3323 words)

Faced with Zero's honeyed yet lewd words, Zhuang Sen was still mechanically pondering the control logic of this retro luxury car—in which dimension was the steering wheel hidden? Were the accelerator and brake voice-controlled? It wasn't until two delicate, smooth buttocks pressed down on his thighs with a warm touch that he realized what this multi-purpose mecha girl meant: Good heavens, this is not the normal operation for taking a driving test at all. How can you drive without even inserting the key?

Having not "driven" for a while, Zhuang Sen had no choice but to pull out his "car key" from his pocket and insert it all the way into the thoughtfully provided "keyhole." Sure enough, a melodious "engine roar" comparable to a top-of-the-line sports car immediately erupted from below. The anti-fall mechanism was truly an industry benchmark; the soft, flexible opening, activated instantly, seemed equipped with intelligent sensors, adaptively contracting and precisely locking into every groove on the key, while also pulling it deeper with an irresistible suction force.

The dashboard lights were all on, but why wasn't the car moving an inch? Zhuang Sen was puzzled when he heard Zero's voice explode in his ear: "Ugh~ Low fuel~ Ha~ Master~" The voice switched between seductive and sweet with a smoother transition than a gear shift, the ending with a perfectly timed tremolo. Zhuang Sen couldn't help but wonder: This doesn't sound like it's low on fuel at all. With the engine so excited, is it treating me like a mobile gas station and automatic refueling machine? Or is this luxury car drinking special "premium gasoline"?

No need for further explanation; Zero's pert buttocks remained firmly pressed against Zhuang Sen's legs, unmoving. The "keyhole," however, suddenly began to play tricks. Dozens, even hundreds, of high-frequency piston movements per second precisely manipulated the orifice, the delicate folds of its inner walls creating an effect akin to precision polishing. Even more remarkable was the continued high-pressure clamping during ascent, as if two chambers worked in tandem: one locked firmly to prevent slippage, like the most robust safety latch; the other focused on the up-and-down thrust, like a tireless mini pile driver. Under this targeted mechanical crushing, Zhuang Sen, completely enveloped in the leather seat, felt a tingling numbness throughout his body, like a senator wrapped in lime. Even his toes curled and trembled unconsciously. The string of reason in his brain snapped, and he "shamefully surrendered" after only a short time, feeling like he'd been instantly killed at the start of a game.

buzzing-

The dark car windows suddenly lit up, revealing the outside view, as if dozens of high-definition screens had been turned on simultaneously. The four wheels spun at the same time, creating a gust of wind that startled the guard outside. Although he couldn't see or hear what was happening inside the car, he remembered that this was a strange thing created by Prince Zhuang Sen's companion. He assumed it was a special bloodline ability and didn't make a fuss, instead watching the luxury car drive away.

……

Inside the vehicle, Zhuang Sen, slumped in the automatically reclining seat, was vengefully toying with the headlights. The smooth touch on his fingertips felt like caressing the finest silk, so delicate he could feel the slight pulsation of blood vessels beneath his skin. He cursed inwardly: The monster girl's talk of fuel and energy was utterly devoid of any substance! It was all just sugar-coated bullets disguised as supplies; this wasn't replenishing fuel, it was clearly "extracting energy"!

"Master, please concentrate on driving and don't get distracted, as this will affect supply efficiency," Zero reminded her earnestly, a smile of satisfaction and excitement playing on her perfect face, with a faint blush at the corners of her mouth. Her "keyhole" tightened even more, the piston movement became more and more rapid, like a precision instrument running at overclocked speed, even her breathing had a regular rhythm, as if strictly executing a preset program.

Zhuang Sen felt that whether he was distracted or not wouldn't affect the fuel supply, and besides, what right did a maid have to order her master around?

So instead of stopping, he intensified his "playing" with her, his fingertips lightly tracing her delicate skin: "Zero, do you still remember the time of the monster girl? And why did you become a relic? Are the other relics like you?"

Zhuang Sen had many questions he wanted to ask, especially about the relationship between the Monster Girl Era and his system, but Zero was completely absorbed in Zhuang Sen at the moment, oblivious to the world around her, and even tried to stall: "Master, please concentrate on piloting this machine, don't get distracted... Oh?!"

The sudden, overwhelming force interrupted Zero's defiant speech. Her large, powerful hands left her with absolutely no chance to resist, and she was directly pressed onto the car seat that she herself had transformed into. The snow-white headlights pressed against the seat that she had molded to be as soft as her own skin, and the unique sensation made the pistons of her body run even faster.

"Master, if you need a different position, just let me know—ooh!!!"

The violent impact interrupted Zero's serious explanation once again. The mecha girl, having successfully teased herself, was pinned to her transformed seat, unable to move. She bit her lower lip with her silver teeth, and an alluring blush rose to the corners of her eyes. The previously tightly locked "keyhole" was roughly pried open, and before it could close, it was ruthlessly flattened. No matter how fast the movement of her soft cavity was, it couldn't keep up with Zhuang Sen's frenzied thrusts. Transparent "oil" gushed out like a tide, pulling out shimmering silver threads along the "keyhole," sticking to the white "rear seat" like spider silk, resembling some kind of peculiar industrial lubricant, gleaming warmly under the light.

The violent impact was completely different from the active piston extraction. With his head pinned down and unable to move, he could only passively endure each increasingly powerful slam. Even the logically sound core of the mecha girl couldn't help but feel a slight heat, emitting a soft hum. Suddenly, the seat switched to massage chair mode, actively kneading and licking. Ripples spread across the leather surface, and the seat even extended into a sphere, enveloping Zhuang Sen's entire body—with his pert "big breasts" sandwiching him in front and his plump "buttocks" locking his throat from behind, the 360-degree intimate contact made Zhuang Sen feel like he had fallen into a gentle trap.

In an instant, apart from the parts that were in contact with Zero, the rest of Zhuang Sen's body felt as if it were being enveloped and clamped by Zero's firm, huge breasts and plump, round buttocks. The reproductive module that had been crushed began to launch a counterattack. The pink cavity no longer tried to dominate the entry and exit movements, but instead became soft but tenacious, clinging and enveloping. No matter whether Zhuang Sen went in or out, the pink and tight flesh cavity clung to him tightly, sucking him in tightly. Even if he was pulled out of place by half an inch, it would never let go. The tight feeling of being enveloped seemed to melt him inside. Zhuang Sen was immediately caught in a fierce battle, as if he were facing two enemies at the same time. To give an example, it was like Okamoto suddenly turning into a gentle catgirl while he was working in the paddy field.

This did indeed put Zhuang Sen in a difficult situation for a time, but it came at a price. Advancing on two fronts meant facing enemies on two fronts simultaneously, so Zero herself quickly fell into a state of extreme pleasure. This manifested in the unconscious changes her flawless body underwent: her buttocks enlarged to withstand the brutal impact, plump and alluring; the seat actively propelled her forward in sync with the rhythm of the thrusts, creating a strange resonance; even the metal car body trembled slightly, the amplitude increasing. And to passersby, it was a very strange sight: a metallic construct with wheels but no windows or horses, capable of leaping and bounding, emitting eerie, demonic howls.

This must be some kind of special bloodline true form. It can't be a carriage, can it? Moving like this, won't it kill the passengers?

……

"Zero, why did the monster girl disappear? Is it related to monsters?" Zhuang Sen pressed down on Zero, who had been moaning for a long time, and continued his attack. Sweat dripped down his jawline and hit Zero's collarbone. He asked the same question again, his voice was panting but he was still persistent, and his eyes were full of the desire to explore.

This time, Zero was much more obedient, answering with intermittent panting, her voice trembling noticeably: "Ohhh~ Master~ This machine stores all birth records~ which can be retrieved at any time~ Ohh~" As she spoke, she unconsciously tightened her body, as if emphasizing how reliable her storage function was.

He continued to switch between a serious demeanor and wanton moans, but his tone had changed noticeably, as if he had truly been corrupted. However, Zhuang Sen didn't care whether the corruption was real or not; he was genuinely delighted by Zero's answer. To be honest, when Zero didn't answer his question directly but instead acted seductively, he thought it was another annoying cliché: finding the key person only to discover that the key person couldn't solve the key mystery due to amnesia, reincarnation, lost records, or other reasons. Fortunately, it seemed that Zero was simply too thirsty to extract the essence.

That's true. If it weren't for that, she wouldn't have needed to introduce a vehicle mode right from the start.

Thinking of this, Zhuang Sen slowed his movements, his fingers lightly stroking Zero's sweaty back, feeling the warmth beneath her delicate skin: "Then after the resupply is over, we need to have a proper data analysis meeting." Zero's ears twitched at his words, a data stream flashing in her previously dazed eyes, as if the system was rapidly searching for information: "This unit is ready at any time... but the current fuel transfer efficiency... it is recommended to keep it running... oh~" As she spoke, she actively tightened her body, the movements becoming more pronounced and intense, as if demonstrating what "high-efficiency operation mode" meant, even her breathing carrying a precise, mechanical rhythm. Zhuang Sen was amused by her seriously lewd appearance, his deep laughter carrying the vibrations of his chest as it reached Zero's body, whispering in her ear: "Yes, ma'am, my mecha maid, but next time it'll be my turn to control the throttle." His warm breath brushed against her earlobe, and before the words were even finished, he launched another charge, fast and fierce. Inside the car, the roar of the engine and the soft moans of a woman mingled together, rising and falling, accompanied by the slight swaying of the metal body, as it drove into the night towards the unknown road ahead, leaving only the soft sound of the wheels rolling over the ground, as if providing accompaniment for this cross-generational "data exchange".

As the mecha-girl car climbed the peak, its speed increased, quickly disappearing from the sight of passersby. Meanwhile, the "energy replenishment" inside the car continued. Zhuang Sen maintained his movements while mentally planning what to do next. Zero seemed to sense his thoughts and suddenly spoke, her voice slightly punctuated by data inconsistencies: "Master's thinking is fluctuating abnormally... It is recommended to focus on the current task... Energy conversion rate can be increased by 37%..." As she spoke, she responded to his distraction with an even tighter wrapping, the folds of the inner walls of the openings rhythmically contracting, as if to prove how outstanding her professional performance was, even reporting the efficiency data clearly.

Zhuang Sen chuckled softly, ceasing his wandering thoughts and deciding to focus on completing the "driving mission" at hand. After all, even the best secrets and the most important mysteries could only be unlocked after this supercar completed this special journey, right? As night deepened, silvery moonlight filtered through the clouds, casting a hazy glow on the metallic construct. Its shadow stretched long on the ground, constantly shifting and changing with the car's sway. The breathing and the soft hum of the machinery inside the car intertwined into a unique melody, accompanying the rhythm of the rolling wheels as it drove towards the dawn that held countless secrets. And the truth about the era of monster girls, like data waiting to be read, quietly awaited in the distance.

The author says:

Author's Note: The repairman said it's probably a motherboard failure. I didn't get it replaced there; I bought my own, and it won't arrive until Monday. I can only try typing on my phone for the next couple of days, so updates might be unstable. Please forgive me.

Chapter 291: The History of Monster Girls

In Zhuang Sen's room, all the monster girls had arrived, curiously examining Zero. They could easily see the abnormality about Zero; aside from the metallic sheen, her perfectly proportioned body and seemingly eternally fixed smile indicated she wasn't normal. So, Zhuang Sen went out and brought back another monster girl?

As expected of my husband!

Zhuang Sen, holding Nia and Ange, with Lime in pudding form on his head, nestled in Dantalian's arms, enjoying the brainwaves. Seeing everyone had arrived, he began to introduce them: "This is Zero Zhuang, a machine-type, she..."

After briefly explaining what had happened at the Missy base, Zhuang Sen gave Zero a general introduction to his wives. Mira subtly teased him, "Zero's arrival is just in time. Darling, where are you planning to hold your wedding with her?"

Before Zhuang Sen could speak, Zero smiled and interjected, "Zero is just a maid, she doesn't need to be with the mistresses..."

Mira waved her hand: "This guy doesn't even spare pets, let alone maids... Ouch~"

Zhuang Sen rubbed Mira's head with the hand he had just used to tap her forehead: "Let's get down to business, Zero. First, let's talk about why the monster girls disappeared."

Zero gracefully lifted her skirt and bowed, the metal on her body surging and transforming into a metal blackboard. A slender metal rod appeared in her hand: "The era of monster girls is actually not much different from now, except that magic and technology are more advanced. However, there is still conflict and chaos between and even within the various races. The most likely cause of war is the struggle for humans. After all, we monster girls just love humans."