Her Younger Sister
“……Did you have a guest?”
Eunsu’s eyes widened slightly. She looked Taeseok over where he sat at the table, then shifted her gaze between Eunjeong’s flushed face, her mussed hair, and her still faintly trembling legs.
As if sensing that something was off, curiosity began to stir in her eyes.
Eunjeong’s heart dropped at that look. Between her thighs, her wetness was still slowly sliding down. Each time the sticky, slick sensation trailed along her skin, she instinctively pressed her legs together a little and forced a smile. The fact that she was a complete mess under her skirt only sharpened the shame under her younger sister’s gaze.
“Say hello. He’s the student who lives in our rooftop room. I make him breakfast sometimes.”
Eunjeong tried for as even a voice as she could manage, but the end of it still shook a little.
Taeseok rose from his seat and offered a natural greeting.
“Hello.”
“Ah… hello.”
The moment a new target appeared, a status window bloomed into view with her at its center.
Name:Kim Eunsu
Age:34
Occupation:Fitness Club Owner & Trainer
Emotion Level — 12 / 100
Dominance — 0 / 100
• Currently in divorce proceedings with her husband
Eunsu dipped her head lightly, still tilting it as if something didn’t add up. The sense that something was wrong pressed hard on her, but she couldn’t yet pin down what it was.
Taeseok gave Eunjeong a brief nod of farewell and spoke softly.
“Auntie. Thanks for the meal. I’ll head back up now.”
“Mm… you will? All right, then.”
Eunjeong answered in a forced bright tone. While Taeseok walked toward the front door, she stood with one hand lightly pressing down her skirt.
Once Taeseok was gone, Eunjeong looked at Eunsu and said,
“Seriously, what’s going on? This early in the morning?”
Instead of answering, Eunsu dropped onto the sofa. As if the strength had drained from her body, she sank deep into the backrest.
“Unnie. I’m really getting divorced this time.”
Eunjeong’s hands stilled for a moment. Then she asked in a quiet voice,
“You… you’ve only been married how long…”
“Does that matter?”
Eunsu cut her off at once.
“If it doesn’t work, you leave. That bastard treats me like a complete whore.”
At the rough words, Eunjeong’s expression hardened slightly. She kept her mouth shut for a beat, then opened it a half-step late.
“…Even so, you should try to meet each other halfway. You… haven’t exactly been careful either, have you?”
Eunsu snorted and shook her head.
“Careful?”
She tilted her head and looked at Eunjeong.
“Ha… Unnie, you’re still saying that?”
Eunsu crossed one leg and leaned further into the sofa.
“I deal with clients for a living. Smiling and playing along is basic. He doesn’t get that. He’s always suspicious, checking my phone, cussing me out.”
Eunjeong’s face grew stiffer by the second.
“He doesn’t even make money. He buys luxury brands and drives around on what I earn, and he still has the nerve to tell me to ‘act more modest.’”
Mid-sentence, Eunsu looked Eunjeong up and down. Something shifted in her eyes.
“But Unnie.”
She leaned forward, drawing closer to Eunjeong.
“You’ve gotten really pretty. Look at that skin. What’ve you been taking lately?”
With one hand she lightly lifted Eunjeong’s cheek and widened her eyes in a playful tease.
“You’ve been getting treatments, right? Or…”
The corner of her mouth slowly rose.
“Did you get a man?”
In that instant, Eunjeong’s gaze dropped. She tried to laugh it off as if it were nothing, but her mouth froze in an awkward line.
“What are you talking about…”
As her words trailed off, heat flooded all the way to her ears. Eunsu did not miss the reaction.
“Ah~ so that’s it.”
Laughing low, she pressed in even closer.
“There is one. There is.”
She peered into Eunjeong’s face as if whispering.
“Who is it?”
“If you’re going to keep talking nonsense, get out!!!”
Eunjeong finally snapped and raised her voice.
“Tch… if it’s not true, it’s not true. Why are you getting so worked up? And… I’m going to stay here for a few months.”
“Huh? What do you mean?”
Eunjeong’s eyes went wide. Eunsu let out a short sigh and scratched her head.
“Honestly… I filed the divorce papers. I think I need to stay here until it’s over. I don’t want to live in the same house as that bastard.”
“Haa… you really…”
Eunjeong pressed her forehead and let out a long breath. Looking at her older sister like that, Eunsu grinned mischievously.
“What? You don’t want me to? I’ll get some treatments like you and get pretty with you. Come on? Share your skin secrets too.”
Leaning against the rooftop railing with a cigarette between his lips, Taeseok smirked at the sound of footsteps on the stairs.
Must be Auntie Eunjeong.
He, too, had been thinking about the morning—about how Eunsu’s arrival had cut things short.
He drew the smoke deep and felt himself grow a little hard below.
This time I’ll finish it properly…
The corner of his mouth lifted.
But the person who appeared at the top of the stairs was not Eunjeong.
Kim Eunsu.
Her athletic, well-trained body was poured into tight leggings and a crop top. The line of her chest, her narrow waist, and especially the full, lifted curve of her hips and thighs pulled the eye hard. Her high ponytail swayed lightly in the wind.
Taeseok was startled for a second, then smoothed his expression.
“Hello. Is there something you need?”
Instead of answering, Eunsu walked over slowly and looked him up and down with deliberate care. Curiosity and open appraisal mixed in her eyes. Then she stepped closer still and asked in a low, blunt voice,
“You… what’s your relationship with my unnie?”
She folded her arms and closed the distance another step. The slight tilt of her head was provocative. A shallow smile sat on her lips, but her eyes were cold and sharp.
“This morning, too… you didn’t just eat with my unnie, did you?”
Every word carried the pressure of I already know.
Taeseok stayed leaning back against the railing and took a long pull on his cigarette. Then he slowly exhaled the smoke and looked down at Eunsu at his leisure. A smile spread across his mouth. There was not a trace of fluster. If anything, he seemed to find the situation amusing; his eyes narrowed as he looked her over carefully.
Completely different character from Auntie Eunjeong.
Unlike her quiet, gentle older sister, the younger one was bold and aggressive. That self-assured manner and those unhidden, direct eyes were rather interesting.
Taeseok ground the cigarette out on the rooftop floor and answered without hurry.
“It wasn’t just a meal… there was a little dessert after.”
He deliberately left the sentence unfinished, letting it trail. The ambiguous aftertaste settled strangely over the air, and through it Eunsu’s eyes flashed for an instant.
She uncrossed her arms and set one hand on her hip. The look that openly measured him held clear displeasure and, beneath it, a peculiar interest.
A short snort escaped her.
“Dessert? Ha… stop dodging and just say it.”
She stepped in, shrinking the space between them.
“What the hell are you doing to my unnie?”
Taeseok did not answer at once. As if savoring her reaction, he met her eyes at an easy pace. Then he let out a light laugh.
“Judging by that look, you already know.”
At those words, Eunsu’s face twisted in a subtle way.
“What… so you really and my unnie…”
She didn’t finish, but the meaning was plain enough.
Taeseok shrugged lightly, as if it were nothing.
“Don’t worry. It’s not that serious.”
In that moment, Eunsu’s eyes changed completely.
“What?”
Strength entered the hand on her hip, and her posture sharpened another degree.
“Not that serious? My unnie isn’t the type to mess around with some guy.”
She took another step closer. Now they were near enough to feel each other’s breath.
“You… are you playing with my unnie?”
Even under that naked suspicion, composure still sat on Taeseok’s face.
“Between a man and a woman, who gets to say who’s playing with who?”
He tipped his gaze slightly and added,
“We see each other because we both like it.”
That matter-of-fact tone only scraped her nerves harder. Eunsu’s mouth twisted upward.
“How does a bastard like you even get with my unnie—”
Before she could finish, Taeseok cut in naturally.
“Why? Curious?”
He didn’t give an inch of ground; if anything, he pushed his gaze in deeper.
“I can tell you…”
A brief silence fell.
Eunsu said nothing as she looked him up and down. Then she let out a short breath and opened her mouth.
“Fine… tell me.”
The corner of her mouth lifted in a subtle way.
“What you did to my unnie.”
Taeseok glanced toward the stairs for a moment, then brought his eyes back.
“Talking about it out here is a bit…”
He let the words trail off as he turned his body naturally.
“Would you like to come into my room?”
At that, Eunsu didn’t move right away. Instead she only tilted her head a little and slowly looked over his back.
“…You.”
Her voice was low.
“What kind of game are you trying to pull?”
Taeseok stopped and only turned his head slightly. A light smile still hung on his lips.
“Would my games even work on you?”
He laughed shortly and added,
“If we fought, I’d probably lose.”
When those words ended, another brief silence passed. Wind skimming the rooftop lightly stirred Eunsu’s ponytail. She stood without speaking for a moment, then finally nodded.
“Fine. Let’s go in.”
And this time, she was the one who moved first.
The instant Taeseok’s door shut, he shoved Eunsu hard toward the wall. The moment her back hit it, he seized her right wrist like lightning.
“Hey!!! What the hell are you doing?”
Eunsu snapped sharply and immediately yanked her hand free. But in that brief second, some kind of energy from Taeseok’s firm, hot grip sent a fleeting jolt through her body. Her body responded to that touch on instinct. Without meaning to, she felt her thighs tighten a little.
“You said you wanted to know. I’m not trying anything with Auntie. You said you wanted to know, so I’m showing you. At first it was like this… I held her hand in my room.”
He stepped back as if to put her at ease.
“Though, for the record, Auntie Eunjeong was the one who took my hand first… May I keep holding it?”
Eunsu’s breathing had gone a little short. She tried hard to keep a cold expression, but she could feel the tips of her ears burning red.
“If it bothers you, you’re free to leave.”
Taeseok spoke with deliberate courtesy, leaving her space to open the door and walk out.
“You seduced my unnie by holding her hand like this? And you’re saying she took your hand first?”
Taeseok only nodded.
“Insane… over something that small? No way. Something else must have happened first. Unnie’s soft-hearted—maybe she felt sorry for you…”
Eunsu stared at Taeseok for a long time. His easy composure scraped at her more and more. In the end she let out a small sigh and said,
“…Fine. Keep going.”
