Chapter 128: Side Story - Younger Sister (11) ♥
Chapter 128: Side Story - Younger Sister (11) ♥
When Kang Yu-ri pulled down her brother’s pants and revealed his cock, Shin Ye-ji’s eyes nearly popped out of her head. It was the first time she had ever seen a man’s genitals, and she was utterly aghast.
It looked hideous, even repulsive. Yet, despite the sense of rejection she felt at the sight of it standing so tall, there was something else—a strange, fluttering sensation deep in her chest.
Even though it was a shape that should have inspired nothing but revulsion, seeing it aimed at her best friend’s mouth stirred a peculiar attraction in Ye-ji, despite her total lack of experience.
Following the heart-pounding sensation, her eyes tracked Yu-ri, who was smiling as she wrapped her hand around her brother’s cock and looked up at him.
The emotion contained in those eyes...
That alone was enough for Shin Ye-ji to realize there was no need to ask questions or harbor doubts.
Gulping hard, Ye-ji watched helplessly as the scene unfolded.
“Oppa, why did it get so big?”
“No, it’s because you’re touching it…”
“Liar. Didn’t you get it up like this because you thought you might get to do it with Ye-ji?”
“No, that’s not it.”
“You playboy.”
The conversation she had with her brother while giggling foolishly carried a chill that sent shivers down Ye-ji’s spine.
“Maybe I should just cut it off.”
“Hey, hey.”
“I’m kidding.”
It felt like it wasn’t entirely a joke, but Kang Yu-jin didn’t bother to press the issue.
Instead, he placed his hand on his younger sister’s head, as if to focus on the foreplay and service that was about to begin.
“Now, prove it to me.”
As Shin Ye-ji reflexively swallowed hard, Yu-ri stared at her brother’s cock with eyes full of affection.
That hideously large, engorged cock.
It already gave off a thick musk, bearing the traces of Yu-ri’s pussy juice and the semen he had previously ejaculated.
He hadn’t gone to the sink to wash up immediately after his last release, so it hadn’t been wiped clean.
That pungent scent was proof of their union. It was evidence of the reckless, forbidden sex the siblings had shared.
Yu-ri loved that smell. It was a sign that she and her brother loved each other desperately and deeply.
Yu-ri shifted her gaze for a moment to look at her friend.
Ye-ji was a best friend but also a former romantic rival—someone who had once fallen for Kang Yu-jin at first sight and tried to confess, only to be thwarted when Yu-ri told her, ‘My brother already has a girlfriend.’
‘It wasn’t exactly a lie, though.’
Yu-ri considered herself her brother’s lover, and that thought hadn’t changed from then until now.
So, as if warning her not to even dream of overstepping, Yu-ri looked at her friend with narrowed, sultry eyes and curled her lips.
“Mwah.”
The erect cock twitched at the deliberate sound. The pulse thrumming in Yu-ri’s hand grew violent.
“Mwah, mwah.”
As she continued to press her lips against it, Yu-jin let out a ragged breath and stroked his sister’s hair.
That touch, that act.
Everything about it was steeped in a thick sense of familiarity. It was an intense display of affection between a best friend and a first love—something a girl with such a small frame could never have imagined.
Unable to even let out a breath, Ye-ji watched as Yu-ri, seemingly satisfied, opened her mouth and stuck out her tongue.
Her tongue, slick with her breath, moved forward. It brushed against the foreskin, wrapped around the shaft, and licked down the length where the veins bulged beneath the skin.
As she licked the wrinkles of his scrotum as if smoothing them out, the intense heat of her saliva-slicked tongue made his balls simmer.
For a moment, Kang Yu-jin wondered if it was okay to do this in front of his sister’s friend, but then he remembered they had already done things like this many times.
The most thrilling time had been when Shin Ye-ji was visiting and knocked on the bathroom door while Kang Yu-jin and Kang Yu-ri were having sex inside.
A thrill even greater than that made his heart race. His cock, which was already sensitive and unsatisfied from the movie theater, twitched and began producing more semen.
That fact alone turned Kang Yu-jin on. The fact that he was getting excited while being watched by his sister’s friend—the thought of showing someone for the first time that he was committing incest.
He twitched with excitement, and Yu-ri, sensing his arousal, moved her slow, sticky tongue toward the head.
“Hehe.”
She let out a giggle as her tongue poked at him. She pulled back the foreskin covering the glans and licked the sensitive flesh. It was an act of foreplay powerful enough to make most men’s hips jerk, but Yu-jin, already accustomed to it, simply let his cock throb.
In truth, whenever they were idle at home, his sister would often take his cock in her mouth and suck on it. Even back when she was a student, she would suck his cock to relieve stress after studying in the evening, or lie on the bed hugging a pillow and ask him to fuck her.
Kang Yu-jin panted, enduring the sensitive and intense stimulation as he harmonized with his sister.
“Gonna thum?”
Yu-ri knew her brother’s ejaculation well. The signs, the aftermath, the spots that produced the most when stimulated, and even how to squeeze out the remaining semen.
So, Yu-ri stuck her tongue out and licked the glans—specifically the urethral opening—as she asked.
“Yeah, I think I’m gonna cum.”
“In front of her?”
When Yu-jin nodded at the muffled question, Shin Ye-ji swallowed hard in unison.
He was going to ejaculate. In front of someone he wasn’t even particularly close to.
He was going to show himself cumming pathetically along with his act of incest. The mere thought made Ye-ji’s mind go blank. Yu-ri, noticing her brother’s hand moving slowly, licked the glans one last time and opened her mouth wide.
What followed was a coordinated action.
Kang Yu-jin grabbed Yu-ri’s head and pushed his hips deep. In an instant, his cock bypassed her mouth and hammered against the back of her throat.
Ugh. As she endured the sudden surge of nausea, her eyes trembled.
Haah. From Yu-jin’s long exhale and trembling body, and from Yu-ri’s reaction as she gripped her brother’s thighs and moaned in a thin, ecstatic tremor, the result was clear.
He had ejaculated. In front of his sister’s best friend, he had cum inside her mouth as if it were the most natural thing in the world.
Thick semen was now passing her throat and seeping into her stomach, the viscosity filling her mouth before sliding down.
But that wasn’t all. Yu-ri pursed her lips and moved them, biting down on the base of his cock to provide further stimulation.
“Ugh, hng, fuuu…”
She wanted to make sure her brother could release every last drop of semen into her belly. So he could feel completely refreshed.
Yu-ri acted out of devotion and love, and Kang Yu-jin finished ejaculating after trembling for a long time amidst a mixture of squeezing pain and pleasure.
Usually, one would have to say when they were finished, but Kang Yu-jin simply waited.
His sister, with her lips still pursed, pulled back. The thick, long cock slid out of her mouth.
Thick saliva was left behind everywhere her lips had passed, and an even more intense yet soft pleasure flowed through his body. When Yu-jin eventually reached out and squeezed his sister’s hand, Yu-ri was still nibbling on the glans, her lips twitching slightly.
Their eyes met. It was a gaze far too heavy for siblings, much closer to that of lovers.
Shin Ye-ji squeezed her legs together as she watched the two of them. Yu-ri, with half-lidded eyes, tracked the wet, sticky sound that echoed for a brief moment.
Her gaze seemed to say she would never give him up. It was like the eyes of a greedy predator. To Shin Ye-ji’s disappointment—as she had expected Yu-ri to say it was now her turn—Yu-ri simply worked her lips over the glans before moving her head again.
She swallowed the saliva-slicked cock and began to suck and move back and forth to stimulate him.
Under that stimulation, the cock slowly regained its vitality. Twitch. Every time the shaft throbbed, it poked her throat, but she expertly endured the rising nausea.
That alone was a testament to the years they had spent together. It was proof of the number of times they had joined their bodies and the time they had spent as lovers.
Overwhelmed by the sensation, Shin Ye-ji repeatedly tensed and relaxed her stomach, pressing her legs together.
Without even realizing it, she was performing pressure masturbation, using the sight of the siblings’ incest—which she was seeing for the first time—as her fantasy.
Pussy juice soaked through her underwear from her dripping wet crotch, and Yu-ri noticed it as she looked at the defenseless opening beneath Ye-ji’s skirt.
Puh-ha. The cock she pulled from her mouth was about the same size as before, but the smell was different. Now, it smelled only of Yu-ri’s saliva. She had sucked it so deliciously that traces of her lip gloss remained near the base.
“Ye-ji, how is it?”
Shin Ye-ji, who had been staring blankly, flinched.
“What do you think about what Oppa and I are doing?”
“It’s… it’s wrong…”
She asked despite it being a difficult scene to answer for. Especially for someone as innocent as Shin Ye-ji.
“You can be honest.”
At the prompting, Shin Ye-ji bit her lip and panted, her skirt still hiked up.
“It’s erotic, isn’t it? It turned you on, didn’t it?”
She nodded hesitantly. Even though she knew she was being manipulated, Ye-ji couldn’t regain control of the situation.
She had always lived that way.
Growing up under strict parents and doing nothing but studying, it was only natural for her to admire a friend like Kang Yu-ri—someone who was lively, free, and beautiful.
Yu-ri wasn’t immature; she was adult-like and had the independence to handle many things on her own.
Unlike her.
And Shin Ye-ji felt as if she had finally discovered the reason why.
Since they were young, her friend Kang Yu-ri had been an adult.
As Ye-ji swallowed hard, Yu-ri gripped her brother’s cock, stroking it as she looked up at him.
“Oppa.”
“…Yeah.”
“Should we take them off?”
“Let’s do that.”
There wasn’t even a hint of hesitation. Perhaps completely aroused, Kang Yu-jin nodded and immediately pulled off his shirt.
Beneath the discarded clothes was a muscular body. He had put on a bit of weight since leaving the military, but he had a solid foundation and a masculine frame.
His sister pulled down his pants, and in an instant, he was naked. Even so, Kang Yu-jin showed no sign of embarrassment as he watched his sister undress and headed for the bed.
As the siblings became naked together, Shin Ye-ji felt her heart beating so hard and fast she thought she might get a nosebleed.
It was finally happening right before her eyes. She was about to witness the process she had only learned through biological knowledge: mating, reproduction.
And in the most twisted and perverted form possible—incest between a best friend and her brother.
Yet, strangely, her heart fluttered. It was then, as Shin Ye-ji’s breathing grew ragged from her racing heart.
Yu-ri faced her friend.
She faced her friend while completely naked. She had seen Ye-ji naked a few times before, like when they showered together on school trips.
But somehow, the body looked different now.
Ye-ji’s dripping wet pussy was pulsing, craving a cock, and the flowing pussy juice had soaked her thighs.
Her nipples were standing tall on her breasts, and she was gasping for air, her chest heaving visibly.
It was in that moment. Yu-ri locked eyes with her friend and spoke.
“Will you help me?”
“Wh-what?”
“Help me put Oppa’s cock into my pussy. Will you help us with the incest?”
Ye-ji’s eyes trembled. While even Kang Yu-jin looked back in confusion, Yu-ri had a thought.
If she made her an accomplice, there would be no problem.
So, she reached out and took her friend’s hand as she approached the bed.
Memories of walking through travel destinations holding hands flashed by. At the end of those memories, Shin Ye-ji reached the bed.
Following Yu-ri’s instructions, she stood before Kang Yu-jin, who was lying on the bed with an erection. Yu-ri climbed on top of her brother, her ass facing him.
Facing the sight of the vaginal opening wetly sucking at the glans, Yu-ri pulled her friend closer and spoke.
“What you need to do is simple, Ye-ji.”
She took Ye-ji’s hands and placed them on her own waist. It turned into an embrace, but she didn’t mind.
In fact, she liked it. Yu-ri whispered while her upper body was cradled in Ye-ji’s arms.
“Just hold me like this… and push me down?”
A small hiccup escaped Ye-ji. Still, Yu-ri didn’t care.
“Push me down, pull me up… you can go slow, or you can go fast.”
The whispering voice was sweet yet sticky. While Ye-ji hesitated, Yu-ri felt her friend’s small hands gripping her waist—a waist that had gained just a little, a tiny bit of flesh from office life.
She felt the breath huffing against her ear, the hot body heat from their contact.
And even more than that, she felt her brother’s cock throbbing with violent excitement.
‘Seriously, he’s such a pervert.’
Thinking this, Yu-ri moved her hips to find her position, and following the supple curve of her waist, the cock met the glans at her vaginal opening.
With everything ready, Yu-ri wrapped her arms around Shin Ye-ji’s waist and finished it.
“Please.”
“Ah…!”
Shin Ye-ji’s body trembled. Then, gripping Yu-ri’s waist, she pushed her down.
The sensation of a foreign object followed immediately. The thick, pleasurable pressure forced open the closed vaginal walls, taming them into a familiar shape.
An inhale escaped her in a sudden gasp, and a wave of pleasure turned her mind white.
After the sound of a wet squelch echoed, Shin Ye-ji stepped back and watched the scene.
The lewd sight of her best friend taking her own brother’s cock all the way to her uterus.
As pussy juice leaked from her underwear and ran down her thighs, Yu-ri looked at her friend and gave an enchanting smile.
Firmly grasping the hands they had joined, Yu-ri skillfully began to grind and lift her hips, speaking as she did.
“I’m only showing this to you… so make sure you watch closely, okay?”
And as Yu-ri began to move her hips quickly and expertly before her eyes…
Shin Ye-ji realized in that moment.
That she would never, for the rest of her life, be able to forget this sight.