Sisters' Time
"Haaah... they're gone."
Even after seeing them off, Dohee still wore a faintly regretful look, the disappointment lingering on her face.
"Yeah......."
Watching their mother and Oppa leave for their date, Dohee let out a sigh of longing while Seohee answered in her usual flat tone. The sisters stared at the front door a moment longer before turning back toward the living room.
"Tch. Sohee's not coming for training today either. I thought we'd all get to spend the weekend together..."
Lately Dohee had been put in charge of training Sohee as a female slave, but today Sohee had family matters to deal with and wouldn't be receiving any training. That left Dohee free at home.
She had been looking forward to a rare weekend of all of them receiving Oppa's training together and spending happy time with him, so the letdown was hard to shake. Of course she would never dream of questioning Oppa's decisions or thoughts, so she had quietly seen the two of them off—but the faint disappointment remained all the same.
"Mom's... the priority..."
Seohee answered from beside her with her usual expressionless face. Anyone else might have thought she was simply accepting it with calm indifference, but Dohee could tell her little sister was just as disappointed as she was.
"When the toy gets here... we can play with her....."
"Yeah, sure."
Oppa had told them Secretary Lee would be coming over a little later, so the sisters decided they could take a little of their frustration out on her. Side by side they headed into the living room.
"Haaah♡ Getting trained every single day... now my body just starts heating up on its own."
Dohee tugged at the loose neckline of her tank top as if she were too warm, fanning her chest. Her face was already faintly flushed—even without Oppa present, she was clearly worked up.
"Yeah..... me too....."
Seohee showed no outward change, but beneath her skirt her pussy was already slick and glistening with juices. Both of them had been thoroughly trained; their bodies now automatically slipped into heat-slave mode on their own.
"H-hey... want to start just the two of us?"
"Yeah..... okay....."
They had once lived as ordinary sisters, but after receiving Oppa's training they had seen every shameful side of each other. There was nothing left to hide, no matter how small.
Weekends used to mean retreating to their own rooms or going out to meet friends, spending time separately. Now living and playing together felt completely natural.
"Seohee♡ Mmph♡ Chuu♡ Mmph♡"
"Chuuu♡ Mmph♡ Haahn♡ Nngh♡"
Their bodies already burning, the two sisters locked eyes and without needing to decide who would move first, stuck out their tongues toward each other.
"Haaah♡ Nngh♡ Chuuu♡"
"Haahn♡ Mmph♡ Chuu♡"
In moments their tongues tangled, saliva mixing in a filthy kiss. Their lips stayed glued together as if they were invading each other's mouths, filling the room with lewd wet sounds.
"Unnie..... you're so..... in heat♡"
Pinch.
"Haaht♡ I-I can't help it♡ Hnnngh♡ When you kiss me so dirty like that♡♡"
Seohee soon found Dohee's nipples, already clearly outlined through the thin tank top, and rolled them between her fingers. She knew every one of her sister's weak spots with her eyes closed; Dohee simply took it, moaning, never trying to push the hand away.
"Masochist... pig slut♡"
"Haaauuugh♡♡"
The harsh verbal abuse from her little sister didn't anger Dohee at all—it only excited her more. Oppa's training had forced her to accept her own masochistic nature, and it had only grown worse; she was now an extreme masochist. Ordinary insults and pain registered as pure pleasure, and anything done to her by family members aroused her even more.
"Getting kissed by your little sister... nipples standing up... you pervert slut♡"
"That's right♡ I'm a pervert slut♡♡ Haaahn♡♡"
Without hesitation Seohee pinched and pulled Dohee's nipples. The springy breasts stretched obediently under her fingers, flaunting just how lewd they were.
"Heeeeh♡ Heghnnngh♡"
Pssshhhhh♡♡
"Filthy..... cat-in-heat slut♡"
Seohee's verbal abuse and the relentless torment of her nipples pushed Dohee past the edge almost instantly. Words and nipples alone had driven her to her limit; climaxing under her little sister's hands, she shamefully squirted, soaking the dolphin shorts she wore and dripping onto the floor, dirtying it.
"Haaauuugh♡♡"
Still using polite speech toward her younger sister even as she came, Dohee's legs gave out. She sank straight down onto the puddle of her own juices, yet showed not the slightest discomfort.
"Bring everything... you want done to you."
"Yeees♡♡"
Treating her older sister like a servant—like her own slave—Seohee walked into the living room and stripped completely naked. Her pale skin, petite frame, and breasts that looked almost too large for her small height bounced with every step, radiating a lewdness that would have any male drooling.
Seohee might have been the one verbally abusing Dohee, but in truth she was in no better state herself. Her nipples stood stiff and swollen a deep pink, ready to tip her over the edge with the lightest touch, just like her sister. Juices that had been flowing ever since they started already ran down her thighs all the way to her calves and ankles, making her look even more depraved.
"I brought them all♡♡"
After a short wait Dohee returned with both hands full of toys.
"You want to be trained this much...?♡"
"Y-yes♡♡ Dohee's so in heat right now she wants her pussy and asshole trained so badly♡♡"
Not a shred of pride remained. The switch had already flipped; Dohee lowered herself even for her little sister, begging to be treated like a toy.
"Spread your asshole....."
"Yeees♡♡"
Without a second's hesitation Dohee dropped to the floor on all fours, grabbed her own ass with both hands and pulled the cheeks wide, breathing hard with an expression full of eager anticipation.
"Get it wet with your pussy juice♡"
Squish squish squish
"Ooooh♡♡ Th-that's not where it goes♡ The tail doesn't go in the pussy♡♡"
Seohee picked up the cat-tail anal plug that belonged to Dohee and, instead of using lube, simply shoved it into her sister's already soaking pussy to coat it.
"Rag... pussy slut♡"
Squish squish squish
"Ooooh♡♡ Yeees♡ Dohee's a dog-rag slut who gets off on having her pussy fucked by her little sister♡♡"
She agreed with every insult and piled more onto herself. Stimulated through both her ears and her pussy, Dohee's face went slack almost at once into a vulgar ahegao—mouth hanging open, drool spilling, eyes rolled back until the whites showed, stupid lewd sounds pouring out of her.
Seohee saw this broken version of her sister nearly every day, yet every time it still made her heart pound and her body heat up even more.
Shlick!
"Ogoooh♡♡"
"Tail... complete♡"
Once the plug was thoroughly soaked in pussy juice, Seohee shoved it straight into Dohee's asshole without the slightest hesitation. It sank in with no resistance at all.
"Heghnnn♡♡ Dohee's pussy and asshole are cumming♡♡"
The dual stimulation of pussy and ass pushed Dohee over the edge again; she squirted once more, further dirtying the floor.
"Lick it up."
"Y-yeees♡♡"
Still on her hands and knees with her ass spread, Dohee only now released her grip and turned around at the command. She looked down at the puddle of her own juices on the floor.
"Then this worthless pussy slut who only knows how to squirt will lick up the juice she made♡ Slurp♡"
She had made a small pool on the floor, yet she still remembered to degrade herself before sticking her tongue out long and flat and lapping it up without hesitation. The act was utterly humiliating and pathetic, but Dohee wore a blissful smile the entire time she cleaned her own juices off the floor.
Looking down at the sight, Seohee felt arousal flood her entire body. Her pussy grew even wetter; she could no longer hold back. She grabbed her own folds and spread them wide left and right.
"Lick this up too....♡"
"Yes♡ Chuuu♡ Mmph♡"
"Haghnn♡... Hnnngh♡"
Dohee licked her lips at the glistening sight of her sister's pussy and, the moment the order came, thrust her tongue forward without a moment's delay. Seohee, every bit as worked up as Dohee, moaned the second that tongue slid inside her and simply enjoyed it.
"Pussy juice slurp♡ It's so good♡ Keep cumming more♡"
"Haahn♡ Hnnngh♡"
The sisters had sucked each other's pussies countless times in this corrupt relationship; Dohee knew exactly where Seohee's weak spots were and worked them with her tongue. Seohee's already drenched pussy welcomed the long-awaited stimulation by pouring out even more juice, coating Dohee's mouth and chin completely.
"I'm cumming...♡"
Pssshhhhh♡
"Haaauugh♡♡"
Seohee grabbed Dohee's head and mashed her face tight against her crotch, flooding her sister's mouth with a thick gush of pussy juice. It came out so hard it looked almost like she was pissing. Dohee drank it greedily as if it were delicious, only pulling away once she had swallowed every drop, an obscene smile on her face.
"Good girl.... Unnie♡"
"Hnnnngh♡♡"
A little sister petting her older sister's head and praising her—yet Dohee closed her eyes and savored the touch as if she loved every second of it.
"Then... here's your reward♡"
"Kyaah♡"
Seohee shoved Dohee flat onto her back without resistance, then straddled her face, gripping her own ass cheeks.
"Unnie's... favorite..... ass♡"
"Mmph♡♡"
She dropped her big ass straight down, smothering Dohee's face completely, and began grinding, delivering the humiliating pleasure her sister craved.