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Protecting My Harem with Earthly Kill-Skills

Im_a_Bacon
14
chs / week
The average realized release rate over the past 30 days is 14 chs / week.
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Synopsis
Author's Note A Note to Readers: This story is an Action-Isekai adventure that blends high-stakes combat with Ecchi Romance and Comedy. Please be advised that while the early journey focuses on world-building and action, there will be R18 content and mature themes integrated into the flow of later chapters as the Harem grows. "In the heart of Tokyo, the world's most elite assassin is dying. Ren Sato—the legendary 'Willow'—is a master of silent death whose own body has become his final enemy. But when a terminal betrayal leaves him bleeding out in a neon-lit alley, the end is only the beginning. Ren awakens not in the afterlife, but in a world of breathtaking beauty and primordial danger, where magic dictates the laws of survival and monsters roam the shadows of giant trees. Restored to a peak performance he never thought possible, Ren is no longer just a man with a rifle; he is a 'System Anomaly' whose very existence is a glitch in the world's design. The sickness is gone. The constraints are off. And the Willow has a new world to scar."
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Chapter 1 - Chapter 1: The Willow

The humidity of a Tokyo July clung to the skin like a damp shroud, heavy with the scent of ozone and recycled asphalt. At twenty-three, Ren Sato felt the weight of the city more than its pulse. He navigated the narrow residential veins of Setagaya, his boots clicking rhythmically against the pavement—a steady, metronomic sound that provided the only structure to another aimless evening. The neon glow of distant Shinjuku bled into the sky, painting the clouds a bruised purple, but here, in the shadows of the low-rise apartments, the air was stagnant and quiet.

Until it wasn't.

The sound was sharp—the wet thwack of an open palm meeting skin, followed by a muffled, ragged gasp. Ren stopped. His eyes tracked the noise to a dimly lit alcove between two vending machines. A young boy, no older than seven, was hunched on the ground, his small frame trembling violently. Standing over him was a man whose silhouette was bloated by rage and cheap convenience-store sake.

Ren didn't rush in. He watched for a heartbeat, his face a mask of chilling neutrality. When the man raised a heavy, calloused hand again, Ren spoke, his voice cutting through the silence like a razor through silk.

"You're wasting a lot of energy for such a pathetic return on investment."

The man froze, his neck snapping around to reveal a face flushed deep crimson, eyes glazed with a dangerous, unstable heat. "The hell did you say, brat? Mind your own business before I bury you."

Ren stepped into the sickly yellow light of the vending machines. He didn't look at the man; he looked at the boy, noting the blooming bruise on the child's cheek. "I'm making it my business because your technique is sloppy," Ren said, his tone conversational, almost bored. "You're hitting him to feel powerful, but your hands are shaking. That's not discipline. That's a tantrum. Tell me, does it usually take this much effort for you to feel like a man?"

"I'll kill you!" the man roared, the scent of fermented grain billowing from him as he lunged.

He swung a wide, telegraphing right hook—the desperate strike of a bully who had never been told 'no.' Ren didn't flinch. He didn't even fully retreat. With a micro-adjustment of his lead foot, he pivoted. The man's fist whistled past Ren's ear, the momentum dragging the older man off balance.

Ren moved with a terrifying, fluid economy. He stepped into the man's personal space, his hand snapping out to catch the back of the man's head while his other arm barred the chest. In an instant, the aggressor was pinned against the brick wall, the air leaving his lungs in a wheezing rush.

"Here is the difference between us," Ren whispered, his eyes locking onto the man's dilated pupils.

The man tried to struggle, but Ren's grip was like iron. He systematically dismantled the man's defense, parrying a desperate knee and answering with a palm strike to the diaphragm that turned the bully's legs to water. Ren didn't finish it. Not yet. He forced the man back upright, holding him by the collar, and drew back his fist.

The man cringed, eyes slamming shut, waiting for the impact that would shatter his jaw.

Ren swung.

The roar of the wind from the punch whistled in the man's ear, but the pain never came. He opened one eye. Ren's knuckles were hovering exactly one inch from the bridge of his nose. The control was absolute; not a single tremor shook Ren's arm. The air between them hummed with the kinetic energy of a blow that had been perfectly diverted at the point of no return.

"You're not worth the paperwork," Ren said softly.

Then, with a flick of his wrist that seemed almost casual, Ren transitioned the stalled punch into a short, explosive jab to the temple. It wasn't meant to break bone—just to overload the nervous system. The man's eyes rolled back into his head, his knees buckled, and he slumped into a heap of silent meat on the pavement.

Ren exhaled, the tension leaving his shoulders. He turned toward the boy, who was staring up at him with wide, terrified eyes.

"Stand up," Ren said, his voice losing its edge but remaining firm. "The ground is dirty, and you have somewhere else to be."

The man lay slumped against the base of the vending machine, the low hum of the refrigeration unit the only eulogy for his consciousness. Ren didn't spare him a second glance. He turned his attention to the boy, who was still huddled in the shadows, his small fingers digging into the gravel of the alleyway.

"He's not going to wake up for a while," Ren said, his voice dropping to a low, grounded frequency. "But when he does, you shouldn't be here."

The boy looked up, his eyes glassy with unshed tears. "He's... he's my step-father. He has the keys."

Ren reached into the inner pocket of his dark windbreaker and pulled out a slim leather wallet. He extracted several crisp 10,000-yen notes—more money than a child of that age should ever see at once—and crouched down, holding them out. The golden light of the machine reflected off the currency.

"Take this. Go to the 24-hour convenience store three blocks over. Sit in the bright area where the cameras can see you. Buy something to eat, stay until the sun comes up, and then go to your grandmother's or a teacher's house. Don't go back to that apartment tonight."

The boy hesitated, his hand trembling as he reached for the bills. "Why are you helping me?"

Ren's expression remained unreadable, a slate of granite in the moonlight. "Because the world is heavy enough without being crushed by someone who's supposed to carry you. Now, move."

The boy scrambled to his feet, clutching the money to his chest, and bolted toward the main street. Ren watched him go until the small silhouette vanished into the neon blur of the city. Only then did he adjust his collar, wipe a smudge of the man's sweat from his sleeve, and continue his walk.

Ten minutes later, Ren stopped in front of a weathered noren curtain hanging over a doorway tucked into a basement stairwell. The sign was simple: Ryu's Noodles. There were no flashy lights here, just the scent of rich, simmering pork bone broth and the muffled sound of a radio playing old Showa-era jazz.

He descended the stairs and took a seat at the far end of the cramped wooden counter. The shop was nearly empty, save for an old man sleeping over a bowl of rice in the corner. A steam-fogged window separated the kitchen from the seating area.

A waiter, his face lined with the weariness of a thousand midnight shifts, approached with a glass of iced water. "What can I get you?"

"Shio ramen. Double pork. Extra green onions," Ren said to the chef, a man whose face was as wrinkled as a dried plum.

"Coming up."

Ren sat in the stillness, his hands resting flat on the scarred wood of the table. He looked like any other twenty-three-year-old decompression after a long shift, his breathing rhythmic and deep. When the bowl arrived, he ate with a focused, meditative intensity. He savored the richness of the soup, the bite of the noodles, and the quiet atmosphere of the shop. To any observer, he was a ghost in the machinery of Tokyo, a soul seeking a moment of peace.

Once the bowl was empty, Ren set his chopsticks down perfectly parallel across the rim. He signaled the waiter for the check. As the man leaned in to clear the bowl, Ren leaned forward, his voice a mere ghost of a whisper that barely traveled an inch.

"The moon is drowning in the well tonight."

The chef's hand paused for a fraction of a second. He didn't skip a beat, wiping the counter with a greasy rag.

"Is that so?" the chef replied, his tone shifting from gruff to professionally hollow. "The water must be deep then. Please follow me, sir. We need to check the plumbing in the back."

Ren stood up without a word. He didn't ask where they were going or what lay beyond the door. He simply stepped over the low partition of the counter, following the man into the dim, narrow corridor that led deep into the foundations of the building. The sounds of the street and the soft jazz of the radio faded away, replaced by the heavy, pressurized silence of the world beneath the surface.

The chef retreated into the steam of the kitchen, his silhouette dissolving as a second man stepped from behind a heavy, soundproofed door. This man was different—older, wearing a charcoal-gray suit that looked more at home in a Milanese boardroom than a Tokyo basement. His eyes were sharp, scanning Ren with the clinical detachment of a jeweler examining a diamond.

He leaned against the mahogany counter, his hands folded. When he spoke, his voice was a low, melodic rasp of pure Italian.

"Dimmi, ragazzo... che tipo di strumento cerchi stasera? Qualcosa che sussurra o qualcosa che canta?" (Tell me, boy... what kind of tool are you looking for tonight? Something that whispers or something that sings?)

Ren didn't miss a beat. He leaned one elbow on the counter, his posture relaxed but his eyes locking onto the Italian's. He replied in the same fluent, rhythmic tongue.

"Niente di speciale. Cerco solo l'equilibrio tra acciaio e silenzio. Senza traccia, senza nome." (Nothing special. I'm just looking for the balance between steel and silence. No trace, no name.)

The man's lips thinned into a ghost of a smile. "Ah, un intenditore." He reached beneath the counter and placed a velvet-lined tray on the wood with a heavy, metallic thud.

On the tray lay two handguns, stripped of every marking, serial number, and logo. They were "ghosts"—sterile instruments of industry.

"The Sig Sauer P226," the man said in English, his accent thick but his technical terms precise. "I've had the slide rails hand-lapped for a frictionless cycle. The reset on the trigger is down to two millimeters. It's a double-action/single-action, but I've tuned the break to be as crisp as breaking glass—exactly 4.4 lbs of pressure."

Ren picked up the Sig, feeling the cold weight settle into his palm. He racked the slide—a mechanical clack-slick that sounded like a bank vault locking. "The rifling?" Ren asked, peering into the dark bore.

"Polygonal," the man replied. "It gives you a better gas seal and higher muzzle velocity. But more importantly, it doesn't leave the same distinct 'fingerprint' on the lead as traditional lands and grooves. It's a clean exit."

He then slid a small, heavy box of ammunition toward Ren. "And the proiettili... these are custom loads. 147-grain subsonic. I've pulled the factory slugs and reseated them in unmarked brass. No headstamps, no manufacturing traces. The powder is a low-flash propellant—you won't get that tell-tale bloom of light if you have to fire in the dark. It's stable, heavy, and very, very quiet."

Ren began to load the magazine. One, two, three. Each round seated with a satisfying metallic snap. "High seating depth?"

"Exactly," the man nodded. "I've crimped them slightly tighter to ensure zero feed failures. In your line of work, a jam is a death sentence. La sicurezza è tutto."

Ren slammed the magazine into the grip with the heel of his hand. The weapon felt like an extension of his own arm—cold, silent, and absolute.

"In this city," the Italian whispered, "the silence is your only true friend. Don't betray it."

Ren tucked the weapon into his waistband, the weight a grounding presence against his spine. "I'm not here to talk," he murmured.

The Italian, Lorenzo, leaned back, his eyes narrowing as they flickered with a dangerous curiosity. He didn't move his gaze from Ren's, the silence between them thick with the unspoken rules of the underworld.

"Quindi, sei qui per il silenzio?" Lorenzo asked in a low, gravelly Italian. (So, you are here for the silence?)

Ren met his gaze, his expression as unyielding as the steel he had just tucked into his waistband. "Il silenzio è l'unica cosa che dura," Ren replied. (Silence is the only thing that lasts.)

Lorenzo's lips curled into a thin, shark-like grin. He stood up straight and extended a hand, the skin calloused from years of handling cordite and cold iron. "I am Lorenzo," he said in English, his voice firm.

Ren reached out, his grip like a vice. They shook hands—a brief, hard acknowledgement of two professionals operating in the dark.

Lorenzo pulled his hand back and gestured to the sterile handguns on the tray. "Is that all, then? Or does the night require more than a shadow's touch?"

Ren didn't blink. He leaned closer to the mahogany counter, his voice dropping into that melodic, Roman cadence. "No, Lorenzo. Non è tutto. Mi serve di più." (No, Lorenzo. That isn't all. I need more.)

Lorenzo's eyebrows shot up. He wiped a stray speck of dust from the counter. "Then tell me, ragazzo, what do you need? A hammer? A scythe?"

"I need eyes in the dark," Ren said, switching to a more clinical tone. "Something that can reach out and touch a target before they even hear the air move. A long-reach tool with a glass that sees through the ink of the Tokyo night. It needs to be ghost-quiet—no muzzle flash, no position revealed. If I fire, the only thing they should notice is the body hitting the floor."

Lorenzo's eyes lit up with a professional spark. "Ah, you want a scalpel for the distance. Vieni con me."

He walked to the back of the room and pressed his thumb against a biometric scanner hidden behind a framed photo of the Amalfi Coast. A hidden door hissed open, revealing a temperature-controlled vault. Inside, the walls were lined with precision-engineered rifles, their matte finishes absorbing the light.

Lorenzo pointed to a sleek, modular rifle that looked like it belonged in a high-tech laboratory.

"Behold the Accuracy International AXMC," Lorenzo whispered, his voice full of reverence. "But for your needs, we have modified it. It's chambered in .300 Blackout—heavy sub-sonic rounds that carry the energy of a freight train but fly quieter than a heartbeat.

"Look at the suppressor," Lorenzo continued, gesturing to a long, carbon-fiber shroud at the end of the barrel. "It's an integral monolithic core. It doesn't just muffled the sound; it traps the gases and eliminates the flash entirely. You could fire this from a balcony and the man in the next room wouldn't wake up."

He tapped the massive, high-tech optic mounted on top. "The scope is a Schmidt & Bender PM II Digital. It has an integrated thermal overlay. You don't just see the target; you see their heat signature through thin walls and curtains. Even in a pitch-black alley, they will glow like a torch for you."

Ren reached out and ran a finger along the cold, textured bolt handle. "Does it break down?"

"Into a standard briefcase," Lorenzo replied. "In three minutes, it goes from a killing machine to a businessman's luggage. Perfetto, no?"

Ren's fingers lingered on the cold carbon fiber of the AXMC, but his eyes remained narrowed, searching the shadows of the vault for something even more absolute. He didn't look impressed; he looked like a man who knew the difference between a high-end tool and a masterpiece.

He turned to Lorenzo, his voice dropping into a low, resonant Roman dialect that felt heavier than the air in the room. "Bello, Lorenzo. Ma dimmi... esiste qualcosa di più perfetto di questa 'perfezione'? Qualcosa che non lascia spazio neanche al dubbio?" (Beautiful, Lorenzo. But tell me... is there something more perfect than this 'perfection'? Something that leaves no room even for doubt?)

Lorenzo froze, his hand still resting on the Schmidt & Bender optic. He let out a sharp, incredulous breath, a dry laugh rattling in his chest. "You have a hunger, ragazzo. But that kind of hunger... it has a price that makes men weep. The equipment you're asking for isn't just black-market; it's experimental. The cost is... esorbitante. Too high for a ghost."

Without a word, Ren reached into his inner pocket. He didn't pull out a stack of yen this time. Instead, he produced a slim, matte-black titanium card with no markings other than a small, holographic crest of a weeping willow embossed in the corner. He slid it across the mahogany counter.

The color drained from Lorenzo's face. He didn't just look at the card; he stared at it as if it were a holy relic—or a death warrant. His posture, previously relaxed and predatory, shattered. He stood up straight, clicked his heels, and offered a deep, waist-bent bow that was far more than a professional courtesy. It was a gesture of absolute subordination.

"Perdonatemi, Signore," Lorenzo whispered, his voice trembling slightly. "I did not realize the depth of the waters I was swimming in. Please... follow me. To the Inner Sanctum."

Lorenzo led him to the very back of the vault, past a final reinforced bulkhead that required both a retinal scan and a physical key. Inside, resting on a pedestal of dampened velvet, was a weapon that didn't look like a rifle—it looked like a piece of dark matter sculpted into a lethal geometry.

"The CheyTac M200 Intervention 'Ombra'," Lorenzo breathed, his voice hushed with genuine awe. "But not the one the Marines use. This is a one-of-a-kind prototype, chambered in .408 CheyTac. It is the bridge between a sniper rifle and a piece of artillery."

Ren stepped forward, his eyes roaming over the weapon with a clinical, predatory intensity. He picked it up, feeling the immense, balanced weight—roughly 14 kilograms of precision engineering.

"Explain it," Ren commanded, his voice cold.

"Everything is bespoke," Lorenzo began, gesturing to the barrel. "The barrel is a heavy-contour, free-floating fluted steel, shrouded in a vacuum-sealed suppressor jacket. It doesn't just muffle the sound—it uses a phase-interference system to cancel the sonic crack of the bullet. At 800 meters, the sound of the shot is indistinguishable from a light breeze hitting a window."

Ren ran his hand over the bolt. It moved with a terrifyingly smooth hiss, the tolerances so tight they felt hydraulic. "And the glass?"

"A custom-integrated L3Harris Panoramic Thermal-Ballistic Suite," Lorenzo replied quickly. "It doesn't just show you heat. It has a built-in weather station and laser rangefinder that feeds real-time data into the reticle. It calculates humidity, wind shear, and even the Earth's rotation—the Coriolis effect—automatically. You don't aim; you just confirm the kill. The bullet remains supersonic out to 2,000 meters, yet the recoil is managed by a hydraulic buffer system in the stock that makes it feel like a gentle push from a child."

Ren peered through the optic. The world turned into a high-definition map of heat and distance. He could see the faint thermal signature of a rat scurrying behind a wall in the alleyway three floors up.

"The rounds," Ren noted, pointing to the massive, pointed copper projectiles in the magazine.

"Solid-turned copper-nickel alloy," Lorenzo said. "Zero lead. They are aerodynamically perfect. At two kilometers, they will punch through a light armored plate and still have enough kinetic energy to liquefy whatever is behind it. It is the ultimate 'Silence,' Signore. The target dies before the light of the muzzle flash even reaches their eyes—except there is no flash."

Ren checked the tension on the bipod, his movements slow and deliberate. He felt the soul of the machine, a silent reaper waiting for a command. He looked back at Lorenzo, who was still standing at a respectful distance, waiting for a verdict.

"It will do," Ren said softly.