Master's Exclusive Beast: Luna's Midnight Leash Walk
Master's exclusive beast. Master's exclusive livestock, Luna. So happy♡
"How's this? Nice and powdery, right?" I rubbed Luna's thigh with my palm. She wiggled her hips like she was about to die of joy.
"Yeah, feels good. You even handle the powder without me saying a word now?"
"If I don't, my butt gets all rashy."
"Only you, Master."
Luna wrapped her arms around my neck and rubbed her face against my chest. Job done. Cleanup done. All that was left was clocking out.
"Promise."
Luna extended her hand smoothly. Her eyes sparkled with anticipation.
"What promise?"
"Walkies. You said you'd take me."
"Oh."
Right. I'd promised to take her for a walk after clearing the backlog of paperwork. It was just something I'd said offhand, but this woman was dead serious.
"You're really gonna do it?"
"Yeah. Walkies. You said you'd put the dog collar on me."
Luna's eyes were resolute. If I refused here, who knew what disaster she'd cause next. I sighed and nodded.
"Fine. But we're only circling inside the lab, okay?"
"No."
"What?"
"We're going outside. Outdoor exposure... no, outdoor walkies."
This was insane. This was a university. Sure, it was past 10 p.m., but there were still undergrads pulling all-nighters on assignments and grad students everywhere. Plus, the security golems in trial operation at the magic control lab were patrolling.
"Absolutely not."
"Then I'll smash the lab window and jump. I'll even leave a suicide note. 'Dying because Master broke his promise.'"
"Haa..."
She wasn't the type of elf to actually die from a fall, but the threat was so extreme I couldn't just ignore it. I racked my brain.
"Okay. But we'll cast invisibility magic first."
"Got it. Hurry and collar me."
Luna craned her neck out. I gave up.
Click. As I attached the chain, Luna's shoulders trembled finely with pleasure.
"Haaah...♡ So tight around my neck..."
"Quiet down. Someone hears that, they'll think you're murdering someone."
"With Master holding it, it really feels like you've got my lifeline in your grip..."
Slipping off her shirt buttons one by one.
"What are you doing?"
"Taking off my clothes?"
"Why?!"
"You ever seen a dog walkies in clothes?"
She brazenly shot back as she dropped her shirt to the floor. Bra? Of course not. Even the diaper? Rip! She tore that off too.
"I just powdered you!"
"Too stuffy. I like bare skin."

Luna was now completely naked, without a stitch on. Her snow-white skin glowed palely in the darkness. The steep curves dropping from her breasts to her waist to her hips. An overwhelming figure.
And she wanted to strut around campus like that?
"You're crazy. Totally crazy..."
"Here, hold the leash."
Luna shoved the end into my hand, then thud—went down on all fours.
"Woof! Walkies time! Woof woof!"
This had to be a dream.
"Hee hee.♡"
Luna let out an excited snort and waved her hand through the air. A hazy barrier enveloped us. It wasn't perfect—up close, you could see it shimmering like heat haze. But blended with the darkness, it should go unnoticed.
...Please.
"We're going. Make one sound, and we're heading straight back."
"Got it, Master.♡"
Screech. I opened the department head's office door.
====================
Late at night. The hallway was silent. Only the faint friction of Luna's knees and palms against the floor echoed softly. Chaf, chaf, chaf.
"Cold... feels so good..."
Luna crawled along, savoring the chill of the floor. Tongue lolling out like a dog, panting. Her ass swayed obscenely. Between the white cheeks, her pink pussy lips twitched open, dribbling fluids.
"Professor. Speed it up."
"Slower... Someone might see..."
She was loving this. The thrill of possible discovery. The razor-edge tension when someone passed by.
That's when it happened. Two male students emerged from a nearby lecture hall a bit ahead.
"Dude, you see this assignment?"
"Yeah. Professor Luna's a total demon."
The students were heading our way. I yanked Luna's leash hard, pulling her to the wall.
But Luna thrust her ass toward the students instead.
What the hell are you doing?!
> [Stay still, you bitch dog.]
Luna flinched and froze. The students brushed right past us.
"Huh? Yo, did you see something just now?"
"What?"
"Something white... like a pale ass. A ghost?"
"Bullshit. Ghosts like that don't exist. Cut back on the porn, man."
The students moved away. Cold sweat poured down my back like rain. Looking down, Luna was clamping her mouth shut, trembling—not from fear, but extreme arousal.
"Master... we almost got caught... They must've seen my ass..."
"Please, just stay still!"
"Aahn... I'm soaked... My filthy juices are dripping all over the floor..."
It was true. The hallway floor she'd crawled had sticky, milky fluid dotted along it. It'd dry by morning, right?
After twists and turns, we slipped out to a quiet spot. Behind the main building, the flower beds. Thick bushes perfect for hiding.
"Haa... haa..."
Luna collapsed onto the grass, breathing raggedly. The grass texture must've been stimulating against her bare skin. Her nipples were stiff and swollen.
"That enough? Let's go back."
"No. Not yet."
"What now?"
"Marking."
"...?"
Territory marking? No way.
Luna squatted unsteadily, like a dog's 'sit' pose.
"Shhh... Gonna do it."
"No! Not here, what the—!"
"Dogs pee outside. Nngh... Been holding it so hard..."
Luna awkwardly lifted one leg, pushing her ass back. Under the moonlight, her pussy was exposed defenselessly. Her aroused, slick folds gleamed palely.
"Master. Watch me. Watch Luna pee."
"......"
No time to stop her. Or honestly, maybe I didn't want to. Drunk on the surreal sight and the forbidden thrill.

Trickle trickle trickle. The sound of the stream cut through the night air. Pale yellow, warm liquid poured onto the dirt. It ran down her thighs, soaked her calves, forming a puddle in the soil.
"Haaaahn...♡ So refreshing... Feels amazing..."
Luna threw her head back in ecstasy. Her fingers gripping the bushes turned white. It was like she was excreting her shame itself.
"Outdoor... exposure... peeing... Nngh... Love it...♡♡♡"
That's when it happened. Vrrrrm. Mechanical whirring. Searchlight beams approaching from afar. A security golem.
"Shit...!"
We had to hide. But Luna was still going. Wouldn't stop. Didn't want to.
"Professor! Cut it off! Security's coming!"
"Can't stop... Nngh... Hnng... Can't...!"
"Goddamn it!"
I grabbed her shoulders and shoved her into the bushes behind the tree.
Crash. Branches scraped, leaves scattered. We ended up piled in the narrow thicket.
Right one meter ahead. The golem lumbered past with thud, thud steps. Its searchlight swept over the piss puddle we'd made.
[Unidentified liquid detected.]
[Composition scan underway...]
The golem halted in front of the puddle. Tension made my heart feel like it would burst.
Under me, Luna was stifling giggles with her hand over her mouth. She was definitely insane.
The golem issued its mechanical judgment and resumed moving. Fading footsteps.
"Phew......"
I exhaled in relief and looked down at Luna. Her dirt-smeared naked body gazed up at me. Her eyes were dangerous.
"You hear that?"
"Hear what?"
"Beast. It said my pee was beast piss!♡"
Luna wrapped her arms around my neck. Her lower body was hot. Fresh piss and juices mixed into a slick mess.
"Guess I'm a total filthy slut after all. Not human, not elf. Master's exclusive beast. Master's exclusive livestock Luna. So happy♡"
Luna babbled nonsense with a dopey grin.
"Let's head back and wash up. You stink."
"Beast pheromones. Smell."
She grabbed my head and pressed it to her chest. Sweat. Dirt. Piss stench. Should be revolting.
But it was dizzyingly stimulating.
"Do me here... I'll bark like a real beast."
"No."
"Just once. Please? Pound me once. Discipline this beast bitch's hole with Master's cock."
Luna fumbled at my belt. No choice. Time for a 'reset'—the classic way of smacking a broken machine.
I yanked her leash hard.
"Kehk!"
With a rough cough, Luna's head snapped back. Her body toppled into my arms, staggering.
I gripped her white tits tight.
"Haa... haa... Yes... Brain's all tingly..."
"Perverted professor."
"Yeah. Si-hun's pervert."
She giggled, rubbing her cheek on my chest. I pulled her up. I smacked her ass as she licked her lips in disappointment.
"Let's go. You're all sticky."
"Carry me."
"You're covered in piss."
"Wipe me. Lick it clean."
"I'd die first."
In the end, I draped my outer jacket around her waist to cover her soaked ass.
"Wash up first. Come on, you're filthy."
"After?"
"Yes."
"So we do it in the bathroom?"
Luna's face bloomed into a grin.
"Master really is a perv. A beast slut like me doesn't even deserve the bed, huh?♡"
"......Haa."
No energy to deny it. We recast the invisibility and slunk back to the lab like stray cats.
The whole way, Luna whispered in my ear.
"When we get back, wash my ass clean. Every nook and cranny."
"Even better if Master licks it."
No sleep tonight either.