Chapter 127: Side Story - Younger Sibling (10)
Chapter 127: Side Story - Younger Sibling (10)
“Welcome. Make yourself at home.”
It wasn't unusual for his younger sister’s friend to visit their house. In fact, it had happened quite often before graduation.
However, he never imagined she would come over now that they were adults—and certainly not with such impure intentions.
Because of that, Kang Yu-jin had been walking on eggshells ever since he stepped inside.
He stole glances at his sister, then at her friend Shin Ye-ji, and then back at his sister again.
Nothing about this was easy, and none of it made sense.
‘Then again, it would be weirder if it did make sense.’
Kang Yu-jin behaved like a civilized man of modern society: he set down his wallet and plugged his smartphone into its charging dock.
Just as a cane or an umbrella was once essential for a British gentleman, or a hat and coat rack were once staples in an American home, the smartphone was an inseparable necessity in the modern world. Thus, Yu-jin considered his proactive management of this essential item to be the mark of a responsible head of the household—
“Oppa, what are you doing?”
“…Praying.”
“Stop saying weird things! Don’t just stand there, come sit down.”
His younger sister beckoned him over with a silly grin. Yu-jin approached while still reading her expression and sat down at the dining table, where he had been eating with his eldest sister just yesterday.
The edges of the folding table were worn down from being used, folded, and stored repeatedly, and those worn parts were currently facing Shin Ye-ji.
It was as if she were a stranger, an outsider, and the attitude toward such a guest had already been decided. Yu-jin knew his thoughts were overcomplicating things and heading in a strange direction, but he couldn't stop them.
The situation warranted it.
‘Do you really want to know? The secret between Oppa and me.’
That was what Kang Yu-ri had said to her best friend, Shin Ye-ji.
She had asked if she wanted to know the secret, adding the cliché warning that once she knew, there would be no going back.
Yu-jin had expected Shin Ye-ji to refuse and run away, but unexpectedly, she had nodded.
Seeing her follow them while blushing faintly, it seemed her friendship with Kang Yu-ri was either incredibly deep, or perhaps it wasn't just friendship at all.
Or maybe…
‘…I’m just being full of myself.’
Yu-jin tried to compose himself as he sat down and looked at the two of them in turn.
The contrast between Shin Ye-ji, who had a petite frame barely over 150cm, and Kang Yu-ri, who was 167cm with long legs and great proportions, was stark.
Just seeing them sitting side by side made his eyes wander automatically. Yu-jin looked back and forth between his sister and her friend, agonizing over his next move.
‘How should I start the conversation? Since I’m the oldest, I should be the one to speak first.’
But it wasn't as if he had ten years more life experience than them. In the eyes of their mother or father, Yu-jin and Yu-ri were practically the same age.
Being the "elder" was merely a title; it hadn't actually granted him any profound wisdom or social grace.
In fact, Kang Yu-ri likely had more social experience than Yu-jin, who had only recently been discharged from the military and returned to university.
After all, Yu-ri was a proper member of society, working at their father’s company as a fresh recruit.
Just as Yu-jin’s thoughts were deepening and the silence was becoming thick enough to touch, Yu-ri spoke.
“Ye-ji.”
“Oh, y-yes!”
“What were you thinking when you saw me and Oppa kissing?”
His sister suddenly called her name and threw out a question. Yu-jin was taken aback by how direct she was being right from the start.
However, as he observed the girl named Ye-ji, he began to understand his sister’s judgment.
Weak-willed, gentle, bright, and innocent.
She was the complete opposite of Kang Yu-ri, who was often devious, possessed a very, very deep inner world, and was prone to obsession.
Ye-ji was so naive that even though there had been countless signs of incest right in front of her, she only realized it after seeing them kiss.
Yu-ri must have figured that even if she told her the truth, Ye-ji wasn't the type to go around gossiping. Having read his sister’s intent, Yu-jin looked at Shin Ye-ji.
“Well, that’s…”
“Be honest.”
“I… I thought I saw wrong….”
“And after you realized you saw correctly?”
Shin Ye-ji hesitated. She kept her head down, only looking up with her eyes.
“I thought for a moment that… maybe what my boyfriend said was right….”
Yu-jin suppressed the urge to tell her he was exactly right and simply nodded.
“B-but… I’m still misunderstanding something, right? There has to be a reason why….”
“No, you’re right.”
“Ah, really? Thank go—”
“It’s because I love Oppa so, so much that I couldn't stand it if I didn't.”
Shin Ye-ji’s expression froze mid-smile, as if her trust had been betrayed. Yu-ri gave her friend a beaming eye-smile.
“That’s why I brought you here. I felt like I could tell you our secret… since it’s you, Ye-ji.”
“I-is that so…?”
“Yeah, you said you wanted to hear it. So I’m telling you.”
Beyond the sound of someone gulping, both Yu-jin and Shin Ye-ji knew that Yu-ri wasn't finished.
Yu-ri rested her chin on one hand and whispered.
“Oppa and I are in love.”
Shin Ye-ji’s mouth fell open. Even though she had expected it and seen it with her own eyes, hearing it admitted so boldly seemed to alienate her. She blinked her large eyes rapidly.
“Since when…?”
“Since we were in middle school.”
“T-then, even back then…?”
‘Back then?’
When Yu-jin looked at his sister in confusion, Yu-ri shook her head as if it were nothing.
“Even when you came over to play, Ye-ji, we were doing it often.”
“Doing it…?”
“Sex.”
Shin Ye-ji flinched violently, her eyes trembling as if she hadn't expected that word. Yu-jin looked at his sister, wondering if she should be going that far, but he didn't stop her.
“The kiss you saw was just a part of it. Actually, we do things much more intense than that every day.”
“That’s….”
“You know when we went to the bathroom together at the cinema earlier, right?”
Ye-ji’s eyes widened in realization as she nodded. Yu-ri gave her friend a benevolent look.
“We did it then, too.”
“…Yu-ri, but you and Oppa are real siblings. You’re family….”
“So?”
Shin Ye-ji fell silent, seemingly at a loss for words. Yu-ri looked at her friend with eyes that held a faint hint of madness.
“Why can’t I like him just because he’s my brother? I like him, and he likes me. We love each other.”
“It’s forbidden by law, and ethically….”
“Then would you understand if it wasn't forbidden by law?”
It was a voice that echoed a familiar argument. Yu-jin anticipated the words that were about to follow.
“Incest is legal in Korea, too. To be precise, it’s legal as long as it’s between consenting adults.”
“I-is it…?”
“Yeah. So, will you understand now?”
It was a difficult question to answer hastily. Even as she watched Shin Ye-ji’s eyes tremble and her hands bunch up the fabric of her skirt, Yu-ri did not look away from her friend.
“Of course, the ethical issues remain. It’s socially frowned upon. But I really love Oppa. And I’m sure he feels the same. Right?”
“Uh, yeah. Me too….”
When the previously silent Yu-jin answered nonchalantly, Shin Ye-ji looked at her friend’s brother—and lover—with eyes full of a strange new light.
It was an expression mixed with disbelief and horror, yet also the dawning realization that there was no room for compromise or persuasion.
Yu-ri smiled as she watched her friend.
“So that… was the secret. I….”
“Hmm? No, it’s not.”
“Huh?”
“I haven't shown you the secret yet.”
Yu-ri giggled. As Shin Ye-ji blinked blankly, Yu-ri looked at her brother.
And Yu-jin knew that look on his sister’s face all too well.
“…Yu-ri.”
“What? We do it all the time.”
“No, the frequency isn't the issue….”
“We did it several times even when Ye-ji was over. In fact, you said it turned you on and did it even more often.”
“No, that’s different from this…!”
“Is it? Well, I still want to do it with Oppa. You said it yourself earlier. That it wasn't enough, and that we should do more when we got home.”
Shin Ye-ji gasped at the sudden turn in the conversation. Yu-ri glanced at her friend and said:
“Let’s do it.”
“…Ah, Yu-ri, still….”
“You don’t want to?”
“It’s not that I don’t want to, but for something like this, Ye-ji has to agree….”
At those words, Ye-ji hiccuped, and for a brief moment, a look of bewilderment crossed Yu-ri’s face.
‘I mean, no matter how naive the girl is, you can’t just wing something like this—’
“What are you talking about?”
His train of thought was cut short. A cold voice flowed out before Yu-jin could finish his thought.
“…Huh?”
“What do you mean, Ye-ji has to agree? That sounds a bit strange.”
“Uh, no….”
“Oppa, don’t tell me.”
Yu-ri let out a hollow laugh and tilted her head as she took off the cardigan draped over her shoulders.
“Did you think I was going to include Ye-ji?”
Seeing her incredulous smile, Yu-jin accidentally let his true thoughts slip for a moment.
“You weren't…?”
“Are you joking?”
“No, I just….”
“Why? Did you want to do it with another woman? Were you more excited about doing it with Ye-ji than with me?”
“No, it’s not like that….”
“Ah, are you bored of me now? Have you had your fill of me all this time and now you’re sick of it? Was I the only one who was serious?”
“No, why are you putting it like that….”
Only then did Yu-jin realize his blunder, his miscalculation.
There was no way Kang Yu-ri would ever share her brother and lover with someone else. Out of pure obsession, she had chosen a middle school very close to his school just so they could walk home together every day.
And that wasn't all. she had constantly kept watch over, interfered with, and sabotaged any potential rivals.
There was no way such a girl would share him now. Yu-ri clicked her tongue and glanced at her friend with clear displeasure.
Her friend’s face was bright red. Perhaps having had similar thoughts, her best friend had her legs tucked neatly together.
Yu-ri smiled as if she had no choice.
Then, as if to show off, she wrapped her arms around her brother’s neck and pulled him close.
Yu-jin couldn't resist, and he felt his sister’s lips meet his.
What followed was a hot, sticky kiss.
Their tongues tangled, their lips brushed against each other—a kiss perfected over nearly ten years of physical intimacy, knowing exactly what the other liked.
It was a kiss of perfect chemistry. To anyone who didn't know they were siblings, they would look like nothing more than a passionate couple.
Frozen by the sudden turn of events, Shin Ye-ji’s face turned crimson. Yu-ri bit her brother’s lip and greedily swallowed his saliva as she continued the kiss.
Amidst the heavy breathing and the wet sounds of their tangling tongues, Shin Ye-ji watched as the siblings slowly began to strip away their layers.
“Yu-Yu-ri…?”
Shin Ye-ji stammered, completely overwhelmed. Only then did Yu-ri seem to remember her presence; she released her brother’s lips, panting heavily as if she had just finished a sprint.
“Ah… right.”
She spoke as if she had genuinely forgotten in the heat of the moment. As Shin Ye-ji watched in bewilderment, Yu-ri gave a soft smile.
“Ye-ji.”
“Uh, yeah….”
“I haven't shown you the secret yet, have I?”
“N-no… I think I’ve seen enough….”
“No, no. You haven't seen it all. In fact… I think it’ll be a huge turn-on if you watch.”
Shin Ye-ji let out a startled hiccup at the explicit words. Yu-ri looked at her friend and said:
“I’m only showing this to you.”
As Yu-jin resigned himself to his sister’s touch, Shin Ye-ji watched her best friend’s hand grope inside her brother’s clothes and pull down his pants.
And just like that, for the first time in her life, she saw the ‘proof of a man’s love for a woman.’
“Watch closely.”
Shin Ye-ji reflexively swallowed hard as she saw her best friend kneel before him.
Soon after, the sound of thick saliva sliding over skin echoed through the room.