Dark... No, Unicorn Knight (4)
“Hah… ugh…”
Selin clamped both hands over her mouth and huddled behind a tree trunk.
She couldn’t make a sound, not even breathe too loudly.
What she was witnessing right now… this… this… she had no idea what to even call it.
And yet, some inexplicable thrill and addictiveness glued her eyes to the scene. Without knowing why, she was utterly convinced of it.
This… this is bad. I don’t know why, but… I get it. This is something bad…
But Selin quickly shook her head, doubting her own thought.
Bad? Something bad? My savior would never do anything like that…
Questions. Doubts. Unanswered riddles.
“Aaaahh, M-Master, Master! Reward your hard-working bitch with a treat!”

A vulgar, lascivious voice, like her brain had melted away, devoid of any shame. It was impossible to believe this was the same stunning, badass big sister who’d just mercilessly slaughtered those slave traders.
Yet there she was, crawling on all fours like a dog, shoving her ass back against the savior and grinding shamelessly.
Selin nearly snorted with laughter at the blatant display, but her mouth snapped shut the moment she saw the savior drop his pants.
I… I shouldn’t look! The savior’s thing… spying on it like this from hiding… that’s bad. Really bad.
Selin thought that, but she couldn’t tear her eyes away. It was like an addiction. Just like her father, who’d suffered through drinking yet kept guzzling it down until it killed him young—knowing it was wrong, but unable to stop because of the pleasure it brought.
“Why the fuck are you talking like a person, bitch?!”
The savior’s terrifying growl.
Nothing like the gentle tone he’d used when apologizing to her earlier. Even Selin, peeking from her hiding spot, flinched and squeezed her eyes shut.
But she cracked them open again, and witnessed something unbelievable.
The savior’s thing… impossibly huge, slapping against the big sister’s cheeks as she panted like a dog, tongue lolling out, grinning like an idiot.
It didn’t even look human anymore.
“Good girl. Bite it, Silver!”
“Ahh!”

At the savior’s command, the big sister ripped off her mask and took it into her mouth. Then she started licking it greedily, sloppily, like it was a dog treat.
Selin knew what they were doing.
She was a poor girl who’d gone to dangerous places looking for work and gotten kidnapped. She’d worked at taverns to feed her orphan siblings in the same boat as her.
But… but… I’ve never seen that. Something that big…
That’s when it happened.
Smack!
Selin watched the savior swing his arm wide, striking the pretty big sister’s bare ass hard.
Violence.
The exact same thing those evil knights and slave traders had done to her and the kids.
“…That’s bad.”
Selin muttered it. But before she could convince herself, another moan shattered her judgment.
“Aaah! Aaaang♥♥♥ Master! Maaaster! Punish your bitch! Discipline this naughty dog who couldn’t wait and begged to be fucked!”
Selin flinched. The cool, scary big sister was making these weird noises.
Silly, childish whining that didn’t suit her age—it was funny, and somehow… a little enviable.
Selin couldn’t understand why the silver-haired big sister was acting like this, but one thing was clear: she loved the savior. Loved him a lot.
“Fine. You hunted well under my orders, so time for your reward, my pet dog.”
The savior’s noble voice dripped with raw, lewd intent.
“Woof! Woof! Heh, hehek! Woof woof!”
The beautiful, badass big sister happily did something even the lowliest slave wouldn’t—acting utterly shameless.
Fluid pooled at the tip of the savior’s monstrous thing, stretching down in sticky threads like a spiderweb. For some reason, it was erotic as hell. Selin, spying from the shadows, instinctively slipped a hand between her legs without realizing what she was doing.
W-what are they gonna do?
[Bad things.] Watching them in secret was an [even worse thing.] The thought fueled Selin’s excitement.
Schlick.
The savior closed in behind the big sister, who was prone on the ground before him.
The forest was dark, but moonlight lit her ass perfectly, exposing it in stark detail. The big sister had the strong body Selin envied—no excess fat anywhere, except there. Thick, meaty flesh clung to it.
As if built to take something like the savior’s.
The savior spread it open with two fingers. The same place Selin had on her own body—smaller, hairless, similar shape.
But Selin had never imagined hers being used like that.
The big sister was ready for the savior’s thing, though. Sticky fluids leaked from the slit.
So much that her thighs were already soaked.
Selin nearly gasped at the lewd sight.
Then the savior pressed his terrifyingly huge thing against her entrance.
N-no! It won’t fit, something that big!
But as if mocking Selin’s plea, the savior slammed his hips forward.
Squelch!
“Kyaaaah! Haaaang! Aaaahng!”
The beastly scream tore through the silent forest night.
No… the big sister no longer looked human at all.
Selin realized she’d seen that face somewhere before, and racked her brain.
It hit her soon enough.
A female stray dog in heat.
Shoving her pussy out in the street, heedless of prying eyes.
That’s exactly how bitches in heat looked.
But that was a dog! Sh-she… the big sister is a person! A cool person!
“Deeper! Haaat! Thrust it deeper! M-Master’s cock is ripping my womb apart!”
Mocking Selin’s thoughts, the once-cool big sister wailed like a vulgar slut.
Selin trembled, pressing her back against the tree trunk.
She should close her eyes. Turn away from this horrific scene and flee the forest. But for some reason, she couldn’t look away.
Splat! Thud! Squish! Grind!
Every time the savior’s hips thrust forward from behind, his thing crushed mercilessly into the big sister’s ass.
The wet, fleshy slaps against bare skin hammered Selin’s eardrums, amplifying her heartbeat to a frenzy.
“How’s it feel? Getting fucked like a dog outdoors? Your post-mission reward fuck?”
The savior asked in a sleazy voice unlike his usual self, taunting the cool big sister… no, the bitch-in-heat pervert who seemed devoid of shame.
“Gweat! Sho gooood! Cock feews so gooood!”
A stupid voice.
Selin’s breathing grew ragged.
The scary, powerful big sister who’d butchered the slave traders—who’d treated Selin like dirt—was nothing to the savior.
One savage thrust from his hips, and she lolled her tongue long, drooling, shaking her ass back and forth.
Bloody tits jiggling mercilessly with his brutal pistoning. White foam bubbling at her entrance every time he pulled back.
A-ahh…
Watching the filthy, violent beast mating in silence, a bizarre heat surged in Selin’s lower belly for the first time in her life.
Deep in her chest ached. Between her legs, her untouched virgin pussy spasmed, squirting hot fluid.
Selin clamped her skinny thighs together in panic, but her juices kept flowing, soaking her ragged skirt hem.
Why… why am I like this? It’s so vulgar and dirty… Why do I envy that beastly act… Hik?!
Selin’s face burned crimson with shame.
Her perfect knight savior, the Unicorn Knight.
She’d dreamed of him warmly embracing and protecting a lowly commoner like her.
That pure longing twisted into dark, sticky female jealousy the moment she saw this rough, bestial rutting—something the innocent Selin didn’t yet realize.
Splat! Paang! Squiiiish!
“Gonna cum. Take it all. You did good for a worthless bitch, so I’ll fill you up hard.”
“Yessss! Cum in meee!”
Smack! Smack! Smack smack!
“Don’t talk like a fucking person, you dog-cunt bitch!”
“Y-yes! …N-no, w-woof! Woof woof woof!”
“Ahaha, good girl. That’s right. Gotta know your place.”
Spurt!
The savior gripped the big sister’s hips roughly, burying himself deep in her ass and holding still.
But Selin saw it. Unlike the panting, crazed big sister, the ever-calm savior’s face softened for the first time. His hips trembled slightly.
Selin didn’t know what it meant, but she craved it anyway.
The big sister rolled her eyes back white, hind legs quivering, squirting white fluid and foam from between her cheeks as she face-planted into the dirt.
The savior kicked her pitifully slumped ass disrespectfully to rouse her.
“Get up, you fucking pathetic bitch. Clean-up time. How many times do I gotta teach you? Want orgasm play again?”
“W-woof… woof.”
The weakly rising big sister turned her face toward his thing this time—not her ass—mouth agape, taking it in reverse.
Watching the whole thing to the end, a strange thought welled up in Selin’s barely budding chest.
If… if I could be of use to him.
Selin’s teary eyes gleamed with twisted desire.
If the noble savior enjoyed such vulgar, bestial acts—if outdoor-fucking a blood-soaked bitch like that stray was his taste…
Then I… I could gladly get down on all fours too, take that scary, hot thing of his… all of it.
Of course, Selin knew bone-deep that a worthless commoner like her had no right to be his proper wife or lover.
So becoming a lowly “dog” at his feet, like the vulgar big sister—comforting his nights—that might be the only way to repay his grace.
No… I could be a better dog than her. Unlike her, I’m a commoner with nothing to lose… If he wants, I could lick anywhere, spread like a beast…
Selin’s slender hand trembled, clutching her skirt hem.
Her pussy burned hot, sticky fluids leaking endlessly, trickling down her thin legs to muddied the dirt.

Terror that the savior or cool big sister might catch her like this even made her leak urine.
Yet Selin couldn’t stop midway.
Huddled in the darkness, she secretly watched the savior scoop the big sister into his arms and thrust in and out again. Cautiously, she slipped her fingers between her legs.
She’d seen it done… but never tried.
Selin began her first masturbation ever, peeping on the savior and the pervert big sister’s mating.