A Perfect Little Puppy
Perfect. I'd become the perfect little puppy. The true nature of this round, hefty metal lump. The reason she'd so obsessively scrubbed my asshole clean in the bathroom just moments ago. I hadn't realized it until now, but suddenly all the puzzle pieces clicked into place.
Right now, Ye-eun Seo was planning to shove that beastly tail accessory clutched in her hand straight into my most secret back hole.
"Alright, get on the sofa over there and lie on your stomach. Stick your ass up high."
"Y-Yes, Ye-eun...?"
"Come on~. Gotta obey your owner, right?"
Ye-eun pointed at the sofa, her voice soft but commanding.
No, I can't obey her like this.
Sirens blared in my head, but the rule that a pet must follow its owner's commands hijacked my body against my will. I climbed onto the sofa as her finger directed and got down on my stomach.
Arms tucked together, face buried in the cushion, back arched low, ass thrust high in the air—a humiliating pose. My bare, naked ass was completely exposed, lewd and vulnerable.
*Squish.*
A wet squeezing sound came from behind me, followed by cold, sticky liquid dripping between my ass cheeks. Then Ye-eun's finger began gently rubbing the entrance to my tightly clenched hole.
"Hiiik...! W-Wait a sec...!!"
"It's okay, Seo-jin. It won't hurt, so don't worry."
"N-No... I can't do this. Pleeease...!"
As her finger tried to push inside, terror overwhelmed me. I clenched my ass with all my might on reflex. My sphincter tightened without a gap, desperately rejecting her touch. Her finger pressed insistently at the entrance, but when I wouldn't relax, she finally pulled back.
"Oh my, our little puppy. Why are you clenching so hard? It'll hurt if you don't relax a bit."
"Hngh...! S-Scary... This is so weird...! P-Please...!"
"Why's that, I wonder... Sigh, our puppy's being difficult."
She stroked my ass gently, as if trying to soothe me, but I refused to let go. This wasn't like the spot between my legs. That front hole was made for insertions from the start, and even though I was new to being a girl, the idea of something going in there still felt distant. Besides, Ye-eun had never really put anything more than her fingers inside my pussy anyway.
But shoving something into my asshole—the hole I'd only ever used for shitting back when I was a guy? And not just fingers, but a cold metal chunk way thicker? No way. I couldn't accept that.
"Hmm... Our puppy won't relax."
"Hngh... Ngh... Ungh...!"
"Guess no choice then."
After rubbing a few more times, waiting for an opening, Ye-eun let out a short sigh and stepped back. Then she called out loudly to Hye-won, who was sitting nearby.
"Hye-won, wanna help out?"
"Hiiik?!"
"Tch, fine. Looks like it's my turn."
I heard Hye-won, who'd been watching from the sofa, stand up with an annoyed grunt. Her footsteps approached from the bed side, and my heart pounded wildly. H-Hye-won was coming? What the hell was about to happen? My chest thumped in dread—I had no idea. I tried twisting to look at her, to explain the situation somehow.
"Seo-jin, why won't you obey your owner now that you're a pet?"
"Hngh... That's, becauseee..."
"A bitch who won't listen..."
*Smack!!*
"Hkiyaat?!"
"...needs a good, stinging punishment, right?"
Lightning cracked through the air as Hye-won's palm slammed mercilessly into my defenseless ass. My mind flashed white. It felt like fire erupted on my skin, spreading through my whole body. The sudden shock made me scream, clutching the bedsheet tight—and in that instant, all the tension drained from my body like a lie.
My tightly shut asshole cracked open just a sliver from the pain.
*Schlup...!*
"Ah, hngaaat...?!"
Ye-eun didn't miss the gap. Her finger plunged inside, slick with cold lube, stirring up my insides. The vivid sensation of something that absolutely shouldn't be there scraping my walls made my head spin and my waist go limp.
"See? If you'd relaxed and obeyed from the start, it'd be so much better."
"Haa, ngh...! I-It hurts... hngh...!"
"It's fine. I'll loosen you up nice and gentle~."
Ye-eun chuckled lazily as she slowly probed and twisted inside my ass. There was none of the unfamiliar pleasure or thrill I'd felt when she touched my pussy up front. Instead, a bloating ache built in my gut, like my insides were being crushed—an unpleasant foreign pressure. To have my most private, dirtiest spot so ruthlessly violated... This was too much. No matter how much my body had turned into a horny bitch in heat, I couldn't handle this.
Safe word...! Say it, say it now...!
My reason screamed warnings, urging me to shout that word. Just utter "banana," and per our deal, this painful, humiliating ordeal would stop instantly.
But...
"Hngt... Haa... Ungh...!"
Only pathetic moans leaked from my trembling lips—no safe word came out. It wasn't that I couldn't say it. My mouth, my instincts, had swallowed the magic word on their own. What would I look like once this beast tail was plugged into my ass? With these puppy ears perfectly atop my head too? An unbelievably vulgar, secret question drowned out the fear entirely.
"Alright, your hole's nice and soft now."
"Haa... Hwiiyaang?!"
"No need for this anymore, huh?"
Ye-eun flicked her finger out like snapping it away.
The sensation made my waist buck as my body shuddered uncontrollably. Even pulling out was so rough. So what would happen when the real thing went in?
"Now I'll attach a real tail to our puppy. Bear with it even if it hurts a little."
"W-Wait a sec...!"
I wasn't ready at all, so I begged Ye-eun to hold on. But ignoring my desperate plea, she lifted the thing right in my line of sight. A fluffy tail attached to a cold metal plug. She shook it teasingly in front of me before pressing it between my ass cheeks.
"Hiiik...!"
Just the touch conveyed its size and weight—goosebumps erupted all over. I had to take this inside? No. I can't! No way I could...
"Going in."
"W-Wait..."
*Schluuuurp...!*
"Hiiyaat...?! I said wait... waaaait...!!"
But Ye-eun brushed off my words and pushed it in. The blunt, lube-smeared metal forced open my narrow, sensitive hole and burrowed inside. Thickness and presence on a whole other level from her finger. Intense bloating like my guts were being shoved upward, my pelvis forcibly stretched—a dull ache overwhelmed me.
"Hii, ngh... Hrgh..."
"Just a bit more—it's almost all in."
"Haak...! S-Strange... Hiiik! My belly... my belly's gonna burst...!"
"It's okay, it's okay. All in now~."
"Huu, uungh...!"
As I tore at the bedsheet, tears streaming, the plug finally passed its thickest part and settled deep inside my ass. Ah, it's in. Despair crashed over me, like the last shred of my human pride had crumbled away.
"Oh my, so cute. Our little Seo-jin~."
"Hngh... Uuu...!"
Ye-eun burst into giggles at the sight—what was so funny? She watched me leisurely for a moment, then patted my ass lightly.
*Slap.*
"Hngik!"
"All done. You can get up now, Seo-jin."
"Haa... Haa... Hngh...!"
Trembling, I pushed up with wobbly arms and slowly raised my upper body. Stepping down to the floor on both feet, the lump inside felt heavy and solid.
"Aht...!"
Every movement made the cold, massive intruder press insistently against my inner walls, asserting itself. And that wasn't all. Straightening my back or taking a step made the fluffy tail dangling from my ass brush my thighs, swaying. The bizarre sensation—like it was mine but wasn't—brought a sticky wave of shame.
"Wooow..."
"Pfft-haha, damn, it's a masterpiece. Seo-jin, you got any idea what you look like right now?"
Ye-eun watched in genuine awe, while Hye-won clutched her stomach, cackling. My face burned red-hot, ready to explode. Mortifying enough to want to die on the spot—but weirdly, my lower belly radiated even thicker, hotter warmth than before. Why the hell am I getting turned on!? It was just embarrassing, degrading, painful. Yet my secret spot was soaked through with clear slutty juices, fully in heat like a bitch.
"Seo-jin, remember what we learned last time?"
"Hngh... Ungh...!"
"The waiting pose for a pet awaiting its owner."
Ye-eun's languid command echoed through the living room. I bit my lip and slowly knelt on the floor. Extending my arms to brace against the ground, I arched my back low into the proper puppy waiting pose. My ass spread, the firmly plugged toy shifted slightly, the tail drooping down. Puppy ears on my head, real tail in my ass, panting like this. No mirror needed—I knew exactly how slutty and depraved I looked.
"Perfect. Absolutely perfect."
"Hnghhh...!"
"Not like last time—you're a really perfect puppy now."
Ye-eun approached and gently stroked my head. Then her hand slid to my nape and yanked the collar.
*Clink.*
"Haangh?!"
"Now we'll get into the real lessons, my pretty little puppy."
"Haa... Haa... Ungh...!"
The choking pressure made me groan as I slowly lifted my gaze upward. It was over. I, Seo-jin Lee, had become the vulgar bitch pet of two delinquent girls.