Unfamiliar Gender, Unfamiliar Lust
Ji-eun was already tasting the pleasures of a female.
Strictly speaking, though, it was the excitement of being female and the mental thrill of being used as one—not yet any physical pleasure.
At least, not until her younger sister’s fingers pinched her nipples at that exact moment.
“Hek…!?”
The moan that slipped out between her lips sounded like a puppy whining after a hard kick to the belly.
“You filthy bitch.”
The scolding landed right in Ji-eun’s ears as she let out that unmistakably female sound.
“Feels good, huh? Not only do you look lewd, but your body’s turned into a total slut too?”
Harsh words. Humiliating words.
Yet every single one of them was true.
“Ah, haah! Ha, ah…!”
Her jaw went slack from the shocking rush of pleasure, leaving only the vowel “ah” possible.
“Hak♡ Ah, haah…!!”
What was this?
Could nipples really feel this good?
Ji-eun wanted to ask. She wanted to demand an answer. If two pleasure switches like this sat right on the front of her body, how was anyone supposed to live normally?
Ji-ah’s touch wasn’t especially gentle.
She simply caught the two stiff nipples between thumb and forefinger and toyed with them like soft little playthings.
Yet every squeeze sent a dizzyingly sweet, tingling current bursting from the tips, racing deep into her chest, then down her spine, up her nape, and straight into her brain.
Like sparks of electricity—crackling, popping.
“Ah, haah…! Hak, haah…!!”
She was melting. Her very self was dissolving.
If having her mouth used by a cock had been a lesson in her place as a female and the satisfaction of that use, then this nipple stimulation felt like her brain and mind were being directly melted into mush.
Irresistible dissolution. Collapse. And—
“Cockrag slut.”
“Kahak…!!”
Fingers pressed down hard, holding the nipples in a long, firm pinch instead of the quick squeezes from before.
“Hak♡ Ah, haah!! Ah, ah, aaah…!!”
The pleasure kept growing stronger.
Goosebumps raced up her spine. Her body trembled uncontrollably.
Her breathing turned ragged and deep. Clear saliva now spilled from lips already slick with fluid.
The pleasure nerves connecting nipples, chest, spine, and brain all screamed at once. Her heartbeat thundered in her ears, each pulse sending fresh waves of white-hot ecstasy through her. Stronger. Stronger. Louder. Crackling—
She floated.
“Hak♡”
Her vision went white. Stars burst behind her eyes.
“—!! —, —!! ……!!!!!”
She knew some sound was tearing from her throat, but she couldn’t hear it. The pleasure flooding her mind drowned everything else out.
Pop. Pop.
The tingling sensation that began at her nipples clawed along every nerve and scraped across her brain.
Her neck arched back. Her tongue lolled crudely from her mouth. Her eyes rolled upward, unfocused.
Sweat poured from every pore. Her thighs spasmed; her legs shook. Her core muscles clenched and released in frantic rhythm.
And deep inside her, the most important female organ also convulsed, crying out in heat—kkuhng♡ kkuhng♡—begging to be loved.
“Ah, uwee….”
“…Haa.”
Slowly she came down from the towering wave of pleasure.
The first thing her eyes focused on was Ji-ah’s gaze, already burning with renewed lust.
“Ah….”
Both of them had just climaxed once. Ji-eun and Ji-ah were no longer in the same mental state as before.
Ji-ah, having tasted male pleasure, now carried a relaxed confidence. Ji-eun, having tasted female pleasure, felt only submission.
Yet neither of their desires had weakened.
They had simply learned.
Learned exactly what they were.
“Hey.”
Ji-ah spoke.
“You really are Han Ji-eun, aren’t you?”
The one who had once been her older brother slowly nodded.
“Haa….”
Ji-ah laughed and cupped Ji-eun’s cheeks with both hands.
“Ah….”
“Stay still.”
Ji-eun’s hands, which had started to rise, obediently dropped back to her sides.
“…Your old face is still in there.”
It wasn’t that Ji-eun’s features were masculine. If anything, her face was the most feminine in the family. Ji-ah simply meant the shape of her eyes and nose—the familiar details that remained.
“…Huuung.”
Ji-ah let out a soft sound.
She had already known this female used to be her brother Han Ji-eun, but the fact now settled even deeper in her heart.
The words that left her lips were simple.
“Good.”
Mockery. Contempt.
“At least you’re useful like this.”
It wasn’t just male lust talking. Of course that played a part, but everyone in the house already knew how Ji-ah had long looked down on her high-school-graduate, jobless older brother.
“Ah….”
Yet the one who heard those words felt no humiliation.
“Useful?”
Her heart skipped.
Of course Ji-eun’s mind knew how insane it was to measure her worth by satisfying someone else’s sexual needs—especially her own sister’s. But two things kept her from reacting with normal disgust.
First, she already carried crushing guilt over being a useless freeloader. A burden. A parasite. Years of that life had worn her down with shame and debt; only someone truly shameless could have felt nothing.
So the word “useful” landed on her like ointment on a wound—painfully sweet.
The second reason was simpler.
“Cock.”
Family, usefulness—those were thoughts. Reason.
But the female named Ji-eun had already tried to resist Ji-ah once, using that reason. She had offered to help relieve her erection with her hand.
And she had been taught the result.
Who was female. Who was male. And how a female must answer a male’s desire.
“Hey. Open up.”
Ji-eun’s eyes widened. Ji-ah’s eyes curved in a mocking smile.
“Open your mouth. What, were you imagining something else? You lewd little slut.”
“Ah….”
Shame and disappointment warred on Ji-eun’s face, but she parted her lips without a word.
Everything was exposed to Ji-ah: the red tongue, the wet inner walls, the white teeth, the pooled saliva.
And Ji-ah spat directly into the hole she had just used.
“Ptoo.”
The sudden splash against tongue and throat made Ji-eun shudder. Instinct told her to spit it out; her new female nature told her to swallow. Caught between the two, she simply held the saliva in her mouth and looked up.
The clean taste of her sister’s spit filled her senses, standing out sharply against the lingering scent of semen.
It tasted of contempt and ownership.
Ji-ah answered the silent question in Ji-eun’s eyes with words.
“Swallow.”
When the command fell, Ji-eun’s throat moved.
“…Gulp.”
“Good girl.”
Praise—perhaps the first she had received in years—sent a shiver of pleasure racing down Ji-eun’s spine.
Ji-ah noticed and grinned.
“Now open up for real.”
This time there was no need to specify which hole.
Playing with a female was only possible when a male had time to spare. Ji-ah’s cock was now fully erect again—thick, hard, and impatient.
There would be no more light teasing with nipples or words.
“You want it inside too, don’t you?”
Ji-ah’s gaze dropped to the spreading stain on Ji-eun’s gray sweatpants.
“You filthy rag.”
Some of the wetness was saliva and semen from earlier, but most of it was something else—another bodily fluid both of them recognized.
Ji-ah reached down and hooked her fingers into the waistband.
“Lift your hips.”
“Ah….”
Their faces drew level. Ji-eun stared blankly at her younger sister’s face right in front of her.
“I said lift.”
The firm command, delivered at such close range, left Ji-eun no room to resist. She raised her hips to make it easier to strip the last of her female disguise away.
Beep.
The sound of the door lock being pressed echoed through the apartment.
Ji-eun’s heart lurched.
Whoever was entering the code had to be either her older sister or their mother.
“Ah, no…”
She couldn’t let either of them see her like this—serving as her younger sister’s outlet.
But Ji-ah only smiled.
“Heh.”
She had realized something.
“So they’re all the same, huh?”
“All” meant her older sister Han Ji-yeon and their mother Yeon Yu-ri.
If the former male Ji-eun had become this, and the former female Ji-ah had become this, then why would the other two women remain unchanged? It only made sense that they, too, now possessed cocks.
And if they did, they were probably suffering under the same overwhelming male lust Ji-ah had just experienced.
Beep! Beep, beep, beep… Beep!
The repeated failed attempts at the lock confirmed it. Whoever stood outside was clearly too distracted to enter the code correctly.
“Ahaha.”
Ji-ah laughed softly. She could almost hear the frustrated, lust-choked breathing of a male on the verge of exploding.
If family was suffering, then of course she should help ease that suffering.
That was what family did.
“Hey, Han Ji-eun.”
Ji-ah smiled and mocked the female beneath her.
“Stand up.”