Pet Sister (1)
I feigned puzzlement and teased her. "Owner? What's that supposed to mean all of a sudden?"
Of course, that wasn't my real thought. Unlike Mom, who'd only held out for four days, my sister had lasted a whole week. Not bad at all.
Instead of answering, Seo-yoon buried her face in the nape of my neck. Her hot breath brushed my skin. She nipped lightly at my shoulder and whispered huskily, "Exactly what it sounds like. You're all I have now."
"What's with the sudden change? Yesterday you were whining for me to kill a bug for you."
"No, I get it now. It wasn't the bug that scared me—it was being without you."
Seo-yoon twisted her head, rubbing her lips against my nape. It was less a kiss and more skinship, just craving that deeper warmth from my body. She burrowed even closer into my arms. The feel of bare skin on bare skin made her tremble with pleasure.
She whispered in a low voice, "You know, Siwoo... if you just say 'good night' to me, I sleep like a rock without a care in the world. But last night without you? I couldn't sleep a single minute till dawn. My head was pounding like it might split open, but lying next to you? It all vanished like magic."
"That's probably just 'cause you've been overworking lately, sis."
Seo-yoon slowly shook her head. "No. This is a sickness that only you can cure. You think that's all? When you say 'eat up' at the table, even the worst slop tastes like heaven. The clothes you pick for me? They're the prettiest in the world. I can't do anything on my own. Isn't it weird?"
She lifted her head to meet my eyes. Her gaze burned with blind trust and raw longing. "I'm handing my whole life over to you. It's so much easier... happier that way. You're the owner of my life."
"Can the head of the family really just give up like that? What about Mom and Da-yeon?"
"Work? I'll keep doing it like always. I'll handle the bills. But that's it. No more playing family head. I'll just... do whatever you tell me. No worries at all."
Seo-yoon clutched the hem of my shirt tight, her knuckles turning white. In a pleading voice, she added, "I'll just wait without asking for anything. I'm really good at that. So please, owner... don't throw me away. Okay?"
I silently rubbed my chin. The woman in front of me wasn't my sister anymore.
"You gonna really obey me?"
"Of course. Tell me to do anything. I'll be your doll, moving only when you say."
I didn't answer. Instead, I got up, stepped off the bed, and stood there. Panic and sorrow flashed in Seo-yoon's eyes for a split second. Had I rejected her?
But instead, I held out my hand to her from beside the bed, palm up. "Hand."
Her face lit up instantly. She placed her hand in mine like she'd been waiting forever, eyes shining like an eager puppy begging for praise.
"Other hand."
She obediently added her left. She'd even adjusted her posture, squatting neatly on the bed. I chuckled and slipped my fingers under her chin, tickling gently.
"Ahh... feels so good..."
Seo-yoon closed her eyes and purred like a cat. Every time my fingers traced her jawline, her body twitched in delight.
"Like it? Feels more like you've turned into a dog than a sister."
"Yeah, I love it. Your touch is the best thing ever. More, please."
My eyes gleamed. I brought my hand to her mouth and commanded, "Open up."
She parted her lips right away, revealing white teeth and pink gums.
"Stick out your tongue."
Her pink tongue poked out. It felt soft against my palm.
"Drool."
"Blrp—."
Seo-yoon gathered saliva in her mouth. It dripped from her tongue tip in heavy drops.

Clear liquid pooled in my palm. She'd forgotten all shame, lost in fulfilling her owner's command.
"More. Till it fills my hand."
"...Slurp, blrrp."
She desperately collected and let it fall. When my palm was brimming and sloshing, I nodded.
"Lick it all up. Not a drop left."
Without hesitation, she bowed her head and lapped at the saliva she'd drooled—her own spit—in my hand. Wet, rasping sounds filled the room as her rough tongue cleaned it spotless, till my palm gleamed.
"All clean?"
"Yeah, owner. See? Spotless."
Seo-yoon licked the drool from her own lips and grinned proudly. I asked again, "You really happy only if I raise you like a pet?"
She nodded fiercely, no doubt in her mind. "Yes! Please raise me. Without you, I might forget how to breathe. If you don't tell me to eat, I could starve forever."
"Fine. Can't not keep a good sister-pet like you."
I ruffled her hair roughly. She beamed like she'd won the world from that crude touch alone.
"From now on, you're my pet sister. Got it?"
"Yes, owner! I'll be the best, most obedient pet sister ever."
Seo-yoon rubbed her cheek against my hand, acting all cute. Her pride as the eldest daughter, her sense of duty as family head—all gone. Who cared anymore?
I pulled my hand back and headed for the door. Seeing my always-stressed, prickly sister smile so brightly for the first time? Worth it, even if the method was a bit twisted. Results mattered.
Before leaving, I murmured low to her on the bed. "But drop the 'owner' thing around others. Don't wanna get caught."
"Got it. Owner—er, Siwoo."
Our relationship had to stay secret. It might've felt unfair to anyone else, but not her. She didn't even think that way. Pets don't resent their owners. Just being allowed nearby had her floating on cloud nine.
While breakfast cooked, I lounged on the living room couch, fiddling with my phone. Mom's clattering came from the kitchen as she stirred the soup. Seo-yoon naturally snuggled into the spot beside me, then flopped her head onto my thigh like a pillow.
"Heavy. And what if someone sees?"
I muttered casually, eyes on my phone. But she just giggled, sliding her hand onto my stomach. Her fingers toyed with the hem of my t-shirt, cautiously exploring my body.
We had a new dynamic now, but not some stiff master-slave deal. More like pet and owner. So Seo-yoon ignored my words shamelessly, spoiling for affection without a hint of restraint.
"Just say I'm tired and needed a nap. Mmm, you smell so good..."
She pressed her nose to my pants and inhaled deeply.
"Kids, breakfast!"
At Mom's call, we gathered at the table. Instead of her usual spot across from me, Seo-yoon glued herself to my side. She didn't touch her spoon. She waited patiently till I picked up my chopsticks and took a bite of tofu from the soybean paste stew.
"Seo-yoon, why aren't you eating? I grilled your favorite sausages."
Mom asked curiously. Only after watching me chew did Seo-yoon finally grab her utensils.
"Oh, yeah. I will."
She speared the best-grilled Vienna sausage... and plopped it right onto my rice bowl. I chewed and swallowed it. She smiled contentedly, like she'd eaten her fill just watching.
The whole meal, she served me side dishes, drank when I did, utterly devoted. When I polished off my bowl and set down my spoon, she did the same—despite a third of her rice left.
After eating, Seo-yoon headed to her room to prep for work. Moments later, she burst into mine, arms full of underwear and blouses.
"Siwoo."
"What now? I'm trying to game."
"Pick what I wear for the video call. For undies, black lace or this peach simple one—which?"
She flaunted them right in my face. I pointed lazily at the black. "That. White shirt."
"Okay. Stuff you pick always looks best on me."
She started changing right there till my glare sent her back to her room. She dressed in the exact combo I'd chosen. Staring in the mirror, she smiled proudly. Herself, tailored to my taste—perfection.
Fully dressed, she grabbed her work laptop and came back to my room. While I lazed on the bed, she set up a small desk on the floor and started typing.
"Sis, isn't the floor uncomfortable? You got a perfectly good room."
"Nah, not at all. Way more productive here."
Even staring at her screen, she constantly checked on me. I'd laugh at my phone? She'd smile too. I'd shift? She'd lift her hips, wondering if I needed something.
Work done, she still didn't leave. She hovered by my side, waiting for me to speak first. No demands, no whining. Just being near me was bliss enough.
That night, after everyone slept, Seo-yoon slipped into my room hugging her pillow. No asking permission—she just climbed into bed naked as always. I sat up at the sight.
I said curtly, "Sis. Come here and masturbate for me."
Her face froze. Hesitating, she asked softly, "How... how do you do that?"