"Then, I'll head back. See you in a bit, Oppa."
"Okay, go quietly so you don't get caught."
"Okay!"
It's early morning, and Yeonji slips back to her room without a sound— safe from her mother's notice.
Well… she's already caught me, though…
Yesterday, my mother-in-law kept up the act of sleep, but she knew Yeonji had snuck into my room.
She'd made excuses to keep us apart, yet it never felt like she truly meant to stop us.
"Hoo… Should I sleep a little more…"
It's still 6 AM— far too early to start the day.
Unemployed now, time stretches endlessly; no rush to rise.
"No… I might as well jog since I'm awake."
If I slack off too much, my body will pay later.
Already up, I change into workout clothes and head outside to run laps around the mansion.
"Huh? Ms. Yeonhee?"
"…Good morning, Juhyun-nim."
Stretching in the yard, a figure appears behind me.
I turn— Yeonhee, in full workout gear.
Her eyes widen briefly in surprise, then settle back into their usual blank mask.
"What brings you out this early?"
"Ah… I woke up and thought I'd jog. You, Ms. Yeonhee?"
"Yes… I run every morning. Routine."
"Really? That's impressive."
"Thank you… Then."
A curt nod, and she's off—starting her jog.
Hmm… I should follow and learn the route.
Keeping a polite distance, I trail behind.
Just one lap around the house… and I'm already winded…
It's not poor stamina— the estate is simply massive.
Living here still feels unreal.
Lost in thought while jogging, the gap between us shrinks.
Am I too close?… But this view…
Ten meters back, my eyes lock onto Yeonhee's form.
Tight leggings, loose tank top— her firm ass sways with every stride.
She's not one bit less than Mother-in-law or Yeonji…
Shameful, maybe, but as a man, I can't look away from that hypnotic motion.
And those breasts—unfair!
Worse still, her large chest bounces visibly even from behind.
No bra, perhaps— they jiggle freely with each step.
Only slightly smaller than Yeonji's or her mother's, their size is unmistakable.
I keep pace, lapping the mansion several times behind her.
"Haa… haa… haa… You run well."
"Hahaha… You too, Ms. Yeonhee…"
I collapse onto the front steps, leaning forward, breathless.
Truthfully, I could run more— but I can't stand up right now.
I can't hide this erection!
Yeonhee's body had worked its magic mid-run.
My cock strained painfully against thin joggers— standing would be obscene.
So I sit, feigning exhaustion.
"Are you alright?"
Jiggle
"Y-yes, I'm fine… hahaha…"
Blunt as ever, but kind— she approaches to check on me.
Each step makes it worse.
I need to press it down…
"I'll fetch water. Wait here."
"Ah… yes, thank you."
Thinking me truly spent, she heads inside.
I start mentally reciting the national anthem— it's starting to work.
Three more verses…
"Here's water."
"Ah… thank you."
Gulp… gulp… gulp…
I'd just begun to calm— but she returns too soon.
And now she's drinking right in front of me.
The way it's dripping… gulp…
I forget my own water.
Eyes glued to the scene: cool liquid spills from her lips, trailing down her neck, soaking the thin tank top.
Sweat had already made it cling— now it's transparent.
"Gul…p"
Slowly, her light pink nipples emerge through the fabric— nearly identical to Yeonji's.
I swallow hard, staring.
"Hoo… What… Ah."
"…Ah! Th-that's…"
Yeonhee follows my gaze downward— spots her own chest.
"…I'll go inside now."
"M-Ms. Yeonhee, wait—!!"
I scramble for words, but she's already gone— back turned, no glance back.
Damn it… she definitely thinks I'm a pervert now…
No excuse could save that stare.
She's like an older sister to Yeonji— a sister-in-law to me.
If she labels me a creep and tells Yeonji or Mother-in-law… trouble.
I'll clear it up later…
Chasing now is pointless.
Erection finally gone, I head inside— feeling I woke early for nothing.
I was too careless…
Back in her room, Yeonhee's face is flushed— a rare crack in her icy composure.
Usually stoic, chic, unreadable— now she's flustered, hands trembling slightly.
A first.
She'd gone for her daily jog, spotted Juhyun— paid it no mind.
Routine attire: light, breathable. Nothing unusual.
But sweat and spilled water turned her top sheer— and Juhyun saw.
That kind of gaze… it's the first time…
She was no stranger to men's eyes.
Beauty, figure— admiration came naturally.
She'd long grown numb to leering, predatory stares.
But Juhyun's was… different.
"It was primal… pure, almost…"
Her fault, yes— but his gaze was raw, unguarded.
Honest in a way that felt… innocent.
And… it was huge…
Normally, she'd snap— but she couldn't.
Her own carelessness. And that erection.
"I thought his pants would tear… Are men usually that big?"
Popular, yes— but romance, marriage? Zero interest.
No boyfriends. No experience.
Sexual knowledge: textbook only.
Then— her first real glimpse of a man aroused.
By her.
It rattled her. She fled before anger could form.
It's not… unpleasant, maybe…
Thump thump thump
Heart racing— from that unguarded stare, from seeing a man hard for the first time.
Confused, she heads straight for a cold shower.
"Then, I'll be off. Mom, Oppa."
"Okay."
"Have a good day, Yeonji."
Breakfast done, Yeonji heads to school first.
Mother-in-law and I see her off— she beams, radiant with happiness.
"I'll drive the young lady, then head to the company for some work."
"Have a good day, Yeonhee."
"Yes, Madam."
"Uh… have a good day."
"…Yes, Juhyun-nim."
Awkward on my end— but Yeonhee responds coolly, as always.
Relief…?
I'd feared she'd tell everything— but she seems to have brushed it off.
Calmer than I expected.
"Then… shall we have tea inside, Master♥?"
"U-um… yes, Mother-in-law."
The moment they're gone, Mother-in-law switches— slave mode activated.
She clings to my arm, lewd smile in place.
It feels completely natural now.
"Come to think of it… last night…"
"Last night, I was asleep the whole time— so I wouldn't know♥."
"…Really?"
"Yes♥."
She plays innocent about our midnight encounter, smile teasing.
No need to press— I drop it and follow her to her room.
"Now that I think of it, I saw you jogging this morning… Should I buy a treadmill? Some equipment?"
"Huh? No, running outside is fine."
Say yes— and she'll build a private gym rivaling professionals.
Even if I got one, I'd barely use it…
My body came from delivery work and basic training— I don't enjoy exercise. Unnecessary.
"Hmm… Really? But you must've been frustrated this morning."
"Huh? Frustrated? What do you mean?"
She slides closer, smile turning playful— and filthy.
"Well… you were rock-hard, but didn't get to cum even once… while staring at our Yeonhee♥."