Killer | Sangwoo x Fem!Reader | Killing Stalking

Just a heads up: Because I don't upload explicit/mature content to my gallery (for the sake of keeping my work as accessible as possible), the events in this fic will be lighter than those in the canon story. Also, this is a yandere fic, and will contain dark themes, so please be advised. Sangwoo is being paired with a girl here since I thought it would be interesting, but I may write one for male readers in the future too. Thanks for taking the time to read this, now onto the fic!


Metal.
You saw your reflection in it...and grimaced.

Since when had you become so wretched? You used to take such good care of yourself before any of this happened. Yet now you looked so...unkempt. So dirty. Your [H/C] locks were freshly washed by his firm hand yet they still looked matted and frayed. Your skin was pallid, and blotted with blooming purple and blue bruises upon your cheekbones. And your eyes...oh...they were the worst. They had once been so lively.

Now they hung hollow, ringed with dark, thick bags.

A mess. That was what you were. A mess.
Somehow though...he didn't seem to care so much. As long as you kept that knife in your hand cutting away at the precise hour he wanted, Sangwoo was happy. As long as you did precisely what he ordered and never dared to leave this house, Sangwoo was happy. As long as you showed your own affections in return to his forceful ones, Sangwoo was happy.

When Sangwoo was happy, it meant you'd live another day without agony.

Sangwoo...
There was that saying, wasn't there? 'It's always the one you least expect'. Certainly there had been many a serial killer over time who had come across as charming and gentlemanly on the surface, using their charms to lure innocent victims in before inevitably revealing their true and twisted selves. Sangwoo was no different of course. People, both male and female, flocked to him like seagulls to a loaf of bread. His smile, his manner, everything he ever showed in public was just pure perfection. One look at him and you wouldn't suspect a thing.

You had once been that way too. The dual-haired fellow had drawn you into his web just like so many other poor girls. His pure white and dazzling smile only had to flash itself once at you and you turned to jelly. There was no denying it, you had been in love. Yet you had never been the same as many of his other admirers. They could be a jealous, nasty bunch, all vying for his attention and competing amongst themselves. They would scoff bitterly behind each other's backs, spreading gossip, saying any little thing that might give them the slightest edge in their romantic pursuits.

It was all so petty, you despised it. You could never be that way. You didn't have that nasty streak.
Perhaps that was why...you, among them, had been spared.

Now wasn't that ironic? A serial killer was arguably one of the most despicable forms a human being could take, and yet he sought some kind of humanity in his own victims? It was all so backwards...but Sangwoo had developed some kind of...genuine infatuation with you.

Did that mean he wasn't cruel to you? No. Sangwoo was Sangwoo, and he would always be Sangwoo.
And Sangwoo was...

“PSYCHOPATH!”
It was the first word you ever screamed at him. The first thing you ever dared to screech into his face. Yet still, even then, he held that placid, bemused expression. His eyes were so hollow they gave you chills. Just looking into them...they were like...pits, pits that could swallow you whole and never release you.

Though any sort of release for you at that point was unlikely. He had made you his prisoner, his pet, as awful and twisted as it was. You had felt so lowly then, lying slumped against the floor and looking up at him with eyes that brimmed full of hot tears. The sharp backhand he had given you left a red welt in your cheek. Even your pleading squeak:
“S-Sangwoo, I'm sorry-”
-did nothing to stop him from encasing you in his shadow, and soon enough beneath him entirely.

One punch in the jaw. One punch in the side. No, two, two for both. Or was it three? Maybe four? You couldn't quite recall, it had all been such a blur. He'd hit you in the stomach a few times too. He was so strong, his arms rippled with muscles. Compared to him you were like a doll, and as if you were porcelain he had taken to smashing you apart right there on the floor of his cold dank basement.

Well...you were still in one piece at least, though barely. Some things were out of place here and there. Your legs for one, which looked more akin to tree roots than human limbs now. All bent and angled in the weirdest parts. Having them broken had been bad enough, the agonizing pain had made you howl. But looking down and seeing them that way every day was almost as terrible.

He told you he loved you, but then why would he break you like this? Was that how anyone treated those they felt affection for? By taking them in their fists and crushing them, forcibly moulding them into some malevolently tragic version of who they had once been? If that was love, then maybe it really was worth dying.

That blade beckoned again. You had long since abandoned the asparagus and taken to staring ceaselessly at yourself with those feral eyes. Yes...there was that technique that Sangwoo had threatened you with, couldn't you do that?
“See the bottom of the staircase here? That's the line. If you cross it, I'll pull your neck back and slice it to shreds.”
Forget shredding it. A well placed plunge into the gullet or a good artery and you'd either bleed out or suffocate in good time.

Your eyes slowly drifted away from yourself and towards the oven. The grime and grease had been freshly scrubbed away by your own raw red hands, so it was primed and ready for you to stick your head inside-

NO! What are you THINKING!? You've come this far, you've endured so much, and NOW you're going to just...give up!?

Maybe offing yourself wasn't the answer. After all, it didn't seem like Sangwoo was planning on killing you like those other women he'd butchered. He'd told you so himself.
“Kill you? Now why would I do that~? I don't want to kiss a corpse.”
Yes...you could stay alive. Keep him pleased, just like this. It wasn't always easy, granted. Sometimes he'd hover behind you, those large cold eyes scrutinizing every tiny movement you made as you went about preparing dinner. He'd wait patiently, like a vulture eyeing some poor rodent that was about to die, preparing for that signal.

An honest mistake, and he'd be on you in an instant. Whether by creatively pressing your fingertips to the stove top and plunging your head into a full sink of dirty dish water, or just beating you senseless, he'd punish you the very moment it happened.

Those occurrences seemed a little less common as of late, probably because you had been working so hard to keep him sweet. Yet you were still so on edge anytime he was around you, or even when he wasn't around, like now. He'd left you alone in the house...almost like he was playing a game with you. Would you dare to leave? Would you?

Was it worth it? Staying here, staying alive, forced to be the girlfriend to a boy who would happily bash your brains in if you stepped too far out of line? Someone who would drag you by the hair or grip you round the neck with his arm when he wanted to move you between rooms? Someone who would force you to kiss him, touch you whether you liked it or not, who did as he pleased with you whenever he was even slightly aroused by the sight of your fragile form?

No. That wasn't a life. That was a pit. Just like those eyes.
And you'd only sink further and further into it if you didn't flee while you had the chance.

Pressing the flat of the knife firmly down against the counter-top as if to seal that promise to yourself not to take your own life, you then turned your head and gazed down the eerily empty corridor. Even when he was around it was always pretty quiet, but this whole house was even creepier when you were alone.

The flat of your hand came flush with the cupboard under the sink, pushing hard enough to propel your wheeling computer chair past the side of the table. The only real hurdle here between the kitchen and the hallway was that strip of wood, jutting out from the floor. The threshold was comparatively so small, something you could have sidled over like a breeze if your legs were working properly, but now it felt like some kind of vast wooden wall that you simply couldn't scale.

You had the chair, and the chair had wheels. Those wheels had a small chance of traversing smoothly over the sharp geometric bump, but a far bigger chance of catching on it and sending you flying to the floor. Never mind the pain that would cause you, it would also leave you having to literally crawl like a worm to reach the front door.

You'd do it if you had to, but it wasn't ideal. Then again, nothing about this situation was.

Quickly, you checked the time on the kitchen clock. There was some leeway. Sangwoo wasn't due back for a little less than another hour. You'd definitely have plenty of time to make it there and get outside. Hopefully at that point you'd find someone who could help you. He seemed to live in a populated area, there were certainly a lot of houses around. So surely a kind soul or two would be able to take you to the police station.

Yes...and when you were there you could tell them everything. About those people he had kidnapped and tortured til' death. How many over time, you couldn't guess, but certainly since you'd fallen into his hands you had seen quite a few. Sangwoo had no qualms about showing you what remained.

“Oh don't cry, [Y/N]. She was a filthy whore anyway. You wouldn't have liked her.”

Oftentimes, when you saw them, it was like looking at a display in abattoir. He typically still had business with their bodies even when they had already passed, and that led to some decidedly inhuman sights that had certainly been burned into your retinas.

“You're a meat eater though, aren't you? Isn't it kind of hypocritical for you to be vomiting right now?”

But at least then, you'd have a good enough memory to tell the police every gritty detail. You didn't care how much Sangwoo loved you, or how merciful he may have believed he was. There was no way you wouldn't see him put behind bars for life.

“Come on [Y/N]...come on...come on...” you breathed heavily and assured yourself in strained whispers, as you made that final decision and started trying to cross the border. Once you were over, however you ended up, you'd have already made your first irreversible step. Sangwoo would see you'd left your post in the kitchen, and he wouldn't be happy about it.

Though he'd be straight up murderous if he saw you past 'the line'. Cross it at your peril.

And you intended to. But first, the threshold strip. Inhaling shakily, you did your best to steel yourself before taking the plunge and going for it. Just for a moment it seemed like you might be successful, as the wheels slid over on top of it without a hitch. However, one must have ended up getting caught, as you suddenly lurched forth and your nose made a beeline for the floor.

You turned your head just in time to save smashing it in (mercifully Sangwoo had spared it so far besides the occasional more playful pinch) and you let your already swollen cheek smack against the polished wood. It was so numb at this point from his palm that you barely felt anything. Your legs did throb but you stuck with it, accepting your defeat and instead dragging yourself across the floor using your clammy palms.

“You're a lucky girl, [Y/N]. Lucky I haven't killed you yet.”
You grunted, straining as you hauled yourself closer to the porch.
“You know why I haven't? Because I love you.”
Your nails dug into the smooth wood but found no grip, only bending back.
“You love me too, don't you?”
You reached up with every bit of strength you could summon, your fingertips just managing to grace the cool edge of the door handle.

“Tell me you love me, [Y/N].”

Whee...whee...
Whistling?

Wait. You knew that tune, didn't you? Come on, you were a smart girl. Of course you did.



The door opened, yet you hadn't pulled it. Warm evening light filtered through the growing gap, and for the first time in so long you felt pure, fresh air gracing your skin, filling your pores. You breathed it in, and could have closed your eyes to revel in the sensation of the outside world. Yet your eyes remained opened and fixed in terror upon the sight that hovered above you.

Two endless voids stared back. Sangwoo clicked his tongue, his expression never changing.
“Ah...and just when I thought you were finally starting to get it. Shame.”
Like a weight, he dropped down to your level, crouching and peering straight into your face.
“If you wanted to join those other girls so badly you should have said so.”

He grinned.

“HAA-!” a desperate gasp of fright left your lips as you scampered back on your elbows, retreating further into the very house you had been trying so hard to leave. Sangwoo just calmly stepped inside after you, letting you try your best to crawl away from him and return to your spot in the kitchen. Hmm...did you really think that would make things better? That he would forgive you because you had a 'change of heart' and abruptly returned to doing what he asked of you in the first place?

No. You obviously didn't appreciate the pain you caused him, nor did you seem to appreciate how kind he was being, letting you live here. You may have thought he was the heartless one, but was it not cruel to toy with people's emotions like that?
“I trusted you alone and everything.” he ran a hand through his soft hair, brushing it back from his handsome visage. “Won't make that mistake again...”

Oh fuck!
Sangwoo slowly strided towards your form, now cornered helplessly against the kitchen counter with your bandaged legs splayed out haphazardly.
Oh FUCK!

He's going to kill me. He's going to murder me.
He said he would. Sangwoo said he would slice me up!
He came back early. I should have never done it. I should have NEVER DONE IT! I'm such an IDIOT!

His hand came down for you like a claw, and you tried to shield yourself, but Sangwoo easily snatched you by the scruff of the shirt you were wearing. You yelped as he pulled you up off the floor like a mother with a puppy, dangling you in front of his tall and imposing form while still remaining totally silent. Your midriff was exposed. His endless eyes flickered down to the bare skin for just a moment, before he reached behind you with his spare hand.

Shnnk...

The knife. He was grabbing the knife. You heard it whistle through the air, and suddenly a cold sharp sensation pricked your bellybutton. Whimpering, you looked down at the recently sharpened weapon he was now holding so snugly against your skin. Just a tiny little push and he'd pierce your belly open like a piñata.

“SANGWOO!” the sob came like a bomb, and you immediately started wailing and crying, petrified that he was really going to go through with it. To think that you had been considering doing the deed yourself earlier.
“-P-please, I've been bad, but I'll be good now, I-I-I swear! D-don't kill me, p-please don't kill me!”

He let you hang there for a moment longer. Then, finally, his expression changed. Sangwoo took on a crooked smirk, and you heard him tut again.
“But what use do I have for a girl who won't give me what I want? What's the point in one-sided love besides breaking your own heart?”
You quickly spluttered out a response: “I-I can give you what you want! A-anything, just please-!”

His brow quirked upward.
“Are you really that desperate?”
“Y-yes! Yes of course I am!”

“Huh.”

The kitchen suddenly melted into a blur. He whirled you around so fast you could have got motion sick from it. Your shoulder blades slammed down hard against the top of the table, cutlery scattering. Sangwoo slapped what remained aside, and you heard the salt shaker smash open and spill fine white grains all over the floor. If you survived, you'd be cleaning that up later, you were sure.

“'Anything' you say. You'd really do anything for me?”
His hand smoothly traversed up to your hair and grabbed a huge chunk of it, pulling the strands taut in an instant. You inhaled sharply through your teeth in response, though granted it was nothing new having him pull your locks like this. The first time had still been the worst...as seemed to be a running theme with you and Sangwoo.

Like he were a shadow himself he fell over you, coming nose to nose with your trembling form. Only then did that grin of his make its return. He didn't say anything, he just let that terrifying smile linger in your sights for a while, before parting those same teeth and motioning them down over the tender skin that connected your neck and your shoulder.

“OUCH-!”
Sangwoo bit down hard, hard enough to draw some blood. He then allowed his tongue to run over the fresh wound he had given you, tending to you like some doting motherly animal, only it barely did anything but add to the stinging pain. When he pulled back a bloody tendril of saliva was hanging from his lip, but he simply batted it away as if it were a mere nuisance.

His one hand loosened from your hair and slid down to cup your cheek, but his other kept pinning you by it. Sangwoo closed the gap and kissed you, tugging your lip down feverishly and plunging his tongue into the confines of your whimpering mouth. You couldn't even begin to think how many times you must have wished for this day to come, yet your naïve self from back then would have never imagined him kissing you so harshly like this.

Still...though you'd endured it many a time, Sangwoo was undeniably skilled, and you felt yourself flushing despite your scalp and neck being on fire. Even though you could feel his thumb and fingers digging into your cheeks while he squeezed your face, a ruined part of you still enjoyed it.

When he finally stopped he still remained close. His face hovered above yours while he licked his lips clean and stared back down into your wide and waiting eyes. The trepidation was evident, as you nervously braced yourself. Those same lips turned up into a malicious smirk, and a wry chuckle left them.

Then the atmosphere went cold.
“...Let's see just how far 'anything' is willing to stretch...”