Unfamiliar Gender, Unfamiliar Lust (3)
She was Han Ji-eun’s older sister and Han Ji-ah’s elder sibling—the eldest of the three, Han Ji-yeon.
She was currently rushing home after hurriedly taking time off work.
“Haa… hah, haaah…”
She pressed her handbag against her crotch as she walked.
“Hngh, ugh…!”
Hot.
Wet.
And unbearably tight.
Ji-ah rocked her hips with her cock buried deep inside that hole. That alone was enough to melt her brain in overwhelming pleasure.
“C-crazy…!”
It felt incredible. From the soft tip of her glans, blood surged all the way down the rigid shaft. Even her balls, brushing against those lips with every thrust, tingled with sensation.
Everything felt far too good.
Good enough to make her lose all reason—though her sanity had already shattered long ago.
“Insane…!!”
Ji-ah couldn’t even form proper words anymore. She simply kept thrusting.
At first, her movements were slow—thump, thump—as she adjusted to the unfamiliar pleasure. But gradually…
“Fuck, this is, haah…! Insane…!!”
Thump thump thumpthumpthumpthump! Thumpthump! Thumpthumpthump!!
Swearing no longer left her lips. Only ragged, masculine grunts of pleasure escaped her—hngh, agh, hngh.
And soon enough, Ji-ah crashed headfirst into the peak of male ecstasy.
What the hell is this?!
Her body felt like it was floating. Her already burning cock grew even hotter, as if it were about to explode.
A completely foreign sensation. Yet she had no intention of stopping. Even if she had wanted to, she doubted she could have.
“Hah, hah, haaah!”
Thump! Thump! Thump!!
As climax approached, her thrusts changed. They grew slower but far more powerful—each stroke slamming into the hole like a violent pounding.
And finally—
“Hngh, hngh, hnnngh…!!”
Thump, thump, thump…!!
Pleasure detonated.
Ji-ah’s vision blurred white.
Ah…
The ecstasy of release. It was similar to the relief of finally pissing after holding it in, yet this sensation—thick pulses surging from the deepest part of her cock—dwarfed that feeling entirely.
Her mind, hazy and fogged, drifted upward.
Feels… so good…
Ji-ah thought blankly, drowning in pleasure only someone with a cock could ever understand.
The ejaculation lasted a long time. It wasn’t just her perception—her cock truly kept pumping out thick, sticky fluid far longer than any ordinary man’s would.
Eventually, the powerful spurts weakened into slow, lazy pulses. The long orgasm was finally winding down.
Semen.
That’s what she was shooting out right now.
“Hah… haaah……”
After one orgasm, a sliver of reason returned. But unlike most men, she didn’t experience a complete crash or post-nut clarity. Her lust had only slightly subsided. Her cock had softened just a little.
Yet she wasn’t satisfied. She wasn’t finished. She hadn’t returned to normal either.
Still…
“…Ah.”
She now had enough presence of mind to look down at the “hole” she’d been using—and at what state she’d left it in.
Maybe… I went a little too far?
The thought proved her reason had partially returned, but also that it hadn’t returned very far.
Han Ji-eun’s face was a complete mess. Thick, sticky saliva coated her chin and cheeks from having her throat roughly fucked. Because her airway had been blocked, she’d been forced to breathe through her nose, leaving the viscous fluid smeared around her nostrils as well.
That alone would have been bad enough.
Most of the explosive load had been forced straight down her throat. But when her esophagus spasmed and clenched shut midway, the remaining semen had nowhere to go. Too much had been pumped into her narrow mouth, so it surged back up and spilled out.
Thick, creamy cum bubbled from her nostrils before bursting free.
“…….”
Tears streamed down her face from the gag reflex, her unfocused eyes staring blankly upward. Ji-ah’s relentless grip on her head had made focusing impossible.
This was no “little” overdoing it.
Ji-ah slowly pulled her cock out of that ruined hole.
“Uwegh…”
Semen that had remained inside Ji-eun’s mouth poured out in thick rivulets. Some splattered onto the sofa, but most landed on the T-shirt she hadn’t had time to remove—specifically, right across those enormous breasts.
Now that Ji-ah could see them clearly, she was struck anew by how absurdly large they were. They’d been big enough to press against her thighs while she held Ji-eun’s head. Soft, pillowy cushions.
“Haa, haa…”
Suddenly, Ji-ah felt an overwhelming urge to see those obscene mounds bare.
Still, she at least had enough sense to speak while reaching for the shirt.
“You okay?”
It wasn’t much consideration—especially since she lifted the shirt before waiting for an answer.
“Egh…?”
Meanwhile, Ji-eun felt like she was half-dreaming. Part of it was oxygen deprivation from having her throat used, but that wasn’t the only reason.
While her younger sister’s cock had been violating her throat, Ji-eun couldn’t understand her own body’s reaction.
Don’t tell me I…
She couldn’t deny it. The sticky wetness inside her tracksuit pants was far too vivid.
I got turned on…?
She had. But why?
If Ji-ah had used a different hole, maybe she could have understood. But it had been her mouth and throat—places with no direct sexual sensitivity. And Ji-ah hadn’t been gentle either.
No matter how soft the flesh, having something that large and hard forced down your throat hurt. Being shaken by the head made her dizzy. Add the instinctive terror of not being able to breathe, and the experience should have been nothing but pain and fear.
Yet ever since she’d felt, seen, and smelled her sister’s cock against her stomach, the female lust that had risen within her only burned hotter from being used so roughly.
Why?
Ji-eun couldn’t understand her own body. Was it because she was a woman now? But not every woman reacted this way.
Regardless of the reason, the violent act had made her core tremble with arousal. That was the truth—and right now, it was all that mattered.
Because the moment Ji-ah’s cock slipped free from her throat, mouth, and lips, a hollow, empty feeling flooded the female’s heart.
“Haa… ah…”
A pitiful, longing moan escaped her.
The sense of fulfillment, purpose, and validation she’d felt while being used sexually had vanished the instant the cock left her. When the spike of happiness suddenly disappeared, she didn’t feel like she’d simply returned to normal. Just as blood sugar crashing left hunger behind, the crash of pleasure left only emptiness—and a desperate craving to feel it again.
That was why Ji-eun remained there with her mouth hanging open, dazed.
She was empty. She wanted to be filled again.
But instead of another cock, what returned to Ji-eun—whose brain was still marinating in the thick, musky scent of semen—was her sister’s voice.
“You okay?”
It wasn’t really a question. Even if she said no, nothing would change.
Still, it was a bare minimum of consideration. And that single line sent a shiver racing down Han Ji-eun’s spine.
“Y-yes—”
Before she could finish answering, Ji-ah grabbed her worn T-shirt and yanked it off.
“Ahn!”
The moan came from the sudden, rough motion making her breasts bounce painfully. But the needy, plaintive tone wasn’t just from pain.
“…They’re fucking hard.”
Ji-ah sneered, looking down at the female who was clearly enjoying herself.
And she was right.
Ji-eun’s nipples—now much larger after becoming a woman—stood stiff and erect, each one slightly bigger than a fingernail.
Of course, nipples didn’t “get hard” from arousal the way a cock did. They’d stiffened from rubbing against the fabric while those massive breasts were pressed against Ji-ah’s thighs during the throat-fucking.
So those proudly jutting nipples were Ji-ah’s fault—male responsibility.
“Hngh…”
But the shame belonged to the female.
Ji-eun tried to cover her nipples with both hands.
“Move your hands.”
Ji-eun’s arms froze awkwardly in the air.
“I said move them.”
Ji-ah commanded again, looking down at the female whose hole she’d just claimed.
“…Okay.”
Ji-eun’s arms dropped limply back onto the sofa.
Ji-ah didn’t move. She simply stared at the female beneath her. After cumming once, she had enough control to not only use the hole but also savor the sight of the woman herself.
“Hngh…”
“Hah…”
Ji-eun hung her head in shame. At this angle, her gaze landed perfectly on the cock that had just used her mouth.
Ah…
Ji-ah’s cock, still glistening with saliva and cum, was already fully hard again.
The thick scent of semen rising from her own throat made Ji-eun swallow unconsciously.
I need to… clean it.
Without being told, Ji-eun opened her mouth to lick the cock clean. It felt like the most natural duty in the world.
But before she could bring her filthy, cum-coated lips any closer—
A lewd moan was torn from her throat.
“Hngh, ahng!?”
A jolt of pleasure shot from her nipples straight into her semen-drenched brain.
“Hah…”
While Ji-eun drowned in masochistic pleasure, Ji-ah let out a sadistic laugh.
“Feels good, you bitch?”
She pinched both of Ji-eun’s nipples between her thumbs and forefingers, pressing down hard—as if punishing them for daring to stand so shamelessly in front of a male.
And Ji-eun’s response was—
“Ahng!? Hngh, hngh…♡”
A confused, overwhelmed moan, as if question marks were floating above her head.
And the wet stain on her tracksuit pants only grew darker.