5 Another Continuing Mistake? – 1
'I did it.'
That was the first thought that came to mind as soon as I woke up.
Usually, people say their mind feels hazy the day after making a mistake like this, but I didn't feel that way at all.
"I guess the only relief is that noona went to her own room…"
On the floor were the leftover pieces of chicken we'd been eating,
and the cans of beer from last night.
But there was something odd.
"Huh…?"
The can on the floor wasn't the usual beer you'd see on a store shelf.
To be precise, it wasn't beer at all.
Normally, beer has a lower alcohol content compared to other drinks,
but the alcohol percentage written in the corner was unusually high.
"Oh… this wasn't beer. No wonder it tasted a bit sweet."
It was a high-alcohol cocktail, just with a bit of carbonation.
It was unusual to see it sold in a can,
but in the end, what mattered was that I'd made a mistake under the influence last night.
"Sigh…"
I let out a sigh as I started cleaning up the floor.
But my clueless mind kept recalling what happened yesterday.
The feel of Chaehee noona's skin.
The sensation of grabbing her waist and thrusting roughly.
The warmth of her pussy, filled with body heat.
Just remembering it was enough to make my cock slowly rise.
'It did feel good. I can't deny that.'
Above all, my cock standing at attention was undeniable proof.
To be honest, if I was being honest about my desires, I wanted to do it with her again.
But how noona would react now that she was sober was another matter.
"How am I supposed to act from now on…?"
If noona didn't remember, it could just end as a summer night's mistake.
But if she did remember, who knows what would happen.
After all, it was noona who started seducing me in the first place.
'No point in worrying about it now.'
Before I knew it, the clock showed 2 p.m.
Since I'd woken up late, my stomach was craving food.
I managed to calm my erection
and, pulling on some shorts, quietly left my room.
But the house was still and quiet.
"Did everyone go out…?"
The first checkpoint was the third oldest sister's room-Chaehee noona's room.
Since it was the closest to mine, I had no choice but to pass by it.
Given what happened last night, tension rose from the soles of my feet,
but thankfully, Chaehee noona's door was firmly shut.
"Phew…"
Unlike before, a sigh of relief escaped me,
and next, I checked the second and first oldest sisters' rooms.
But neither of them were there.
'Let's just eat first and figure things out.'
As I went downstairs and approached the fridge,
I ran into someone I didn't expect.
To be exact, I hadn't expected to see this person on the first floor.
"Ah…"
Chaehee noona was sitting at the table, eating cereal.
Wearing only black underwear.
Normally, I wouldn't have cared.
Chaehee noona often walked around in her underwear.
But after last night, when we'd shared our bodies, it was different today.
'Does she remember what happened last night?'
I immediately checked her expression,
but found nothing that would give me a clue.
Instead, Chaehee noona spoke in a completely normal tone.
"You're up?"
"Yeah…"
I answered in a half-asleep voice,
and noona looked back down at her phone.
Her reaction gave me no hints about whether she remembered last night.
But one thing was clear.
Even if she did remember, she wanted to act like nothing happened for now.
"What about Mom, the younger sister, and the oldest sister?"
"They went out. They even left a note in the fridge telling us to eat on our own. All three are coming home late tonight."
That meant only the two of us were left in the house.
No matter what happened.
Even if we ended up having even wilder sex than last night.
The only people who would know were me and Chaehee noona.
But for now, all I could do was act like nothing happened, just like her.
"Noona, can I have some cereal too?"
"Here."
First, I needed to fill my stomach.
With that in mind, I brought over a spoon and a bowl,
but suddenly, I dropped the spoon from my hand.
… Clatter-
Instinctively, I bent down under the table to pick up the spoon.
There was no ulterior motive.
But as if led by instinct, my gaze drifted forward.
Her black panties, covering her private area.
The valley between her legs, visible from under the table, radiated a dangerous kind of allure.
The dimness under the table only made it look even more erotic.
"Ugh…"
Just as I found the spoon and started to get up,
noona's legs closed together, hiding her private area.
That was definitely suspicious.
Normally, Chaehee noona wouldn't do something like that.
Even if her little brother glanced at her panties, she would usually tease me about it.
But now, she closed her legs like a shy girl.
'This… must mean she remembers last night… right?'
No matter how I thought about it, it was a reaction that only made sense if she was conscious of what happened last night.
But I couldn't just say that out loud.
"…"
We quietly ate our cereal, both looking at our phones,
and a subtle, erotic tension lingered across the table.
Rattle-
Noona was the first to get up.
She'd started eating earlier, so it was only natural.
"…Daehyun."
"Hm?"
"Are you going out later?"
Why was she asking at this moment?
I didn't know the reason, but my instincts answered honestly.
"No. I don't really have anything to do today."
"If you're not busy… want to watch a movie together in the living room…?"
Noona's face was so cute I couldn't possibly refuse.
She looked just like a girl confessing her love.
Her cheeks were faintly flushed,
and her lips were tinted a seductive color.
"Well… I didn't have any plans anyway."
"Then finish eating and come to the sofa. I'll be waiting…"
'I'll be waiting.'
Words that wouldn't have meant anything yesterday now made my heart race.
…And noona's face had already shifted to her usual playful smile.
"You know if you're too slow, you'll have to pay for the movie, right?"
It was a playful, yet subtly erotic mood.
I couldn't help but smile.
"Didn't you say you'd pay for the movie since you suggested it?"
"Hmm… depends on how you behave."
It wasn't a very skilled attempt at seduction.
But her invitation was impossible to refuse.
I didn't know exactly what she was thinking,
but the thought of her waiting for me made me feel excited.
'I did it.'
That was the thought that crossed Chaehee's mind as she got up.
But there was no discomfort or regret.
Rather, there was a faint thrill, as if she'd accomplished something.
"Ugh… I can't believe I actually did it."
In fact, Chaehee had dreamed about this for years.
In her dreams, she slept with her younger brother Daehyun,
and more than once she'd woken up to find her bed wet with her own juices.
If it had only happened a few times, she might have dismissed it as a weird dream,
but the recurring dreams were clear evidence of her feelings.
But even though they weren't related by blood, they still lived as brother and sister.
Even if she had feelings for him, she couldn't show it as romantic love.
The way she'd acted close to Daehyun was just her way of hiding her feelings.
Chaehee had tried to bury her affection for Daehyun,
but last night, under the influence of alcohol, her true feelings slipped out.
She'd provoked her brother with lewd words,
and he responded, taking her into his arms.
That fact felt dangerous, but also thrilling.
'Now what…'
If she kept acting like nothing happened,
it would probably end as a one-night stand.
But once she'd crossed the line, Chaehee found herself tempted again and again.
"It definitely… felt good…"
Sex in reality, not just in a dream.
It felt better than she'd imagined-sweet as a drug.
Daehyun's cock was so big and thick, she wanted to keep thinking about it…
The warmth of a male's body was now imprinted on Chaehee.
"Maybe I should just go downstairs and see…"
The clock pointed to 1:30 p.m.
After such a wild night, her body was craving energy.
Chaehee went down to the first floor and started eating cereal,
and before long, Daehyun appeared.
"Ah…"
Her first feeling was surprise.
But she regained her composure faster than Daehyun.
'What should I say…?'
She kept a calm expression, but her mind was racing with thoughts.
Then, when Daehyun dropped his spoon and ducked under the table, she instinctively closed her legs.
Just like a woman embarrassed that her true feelings had been exposed.
"Ugh…"
It was as good as admitting she remembered last night.
But instead, Chaehee actually felt a bit more at ease.
She made a suggestive invitation,
and Daehyun accepted it as a positive signal.
Because of that, a smile appeared on her face-
playful, but with a hint of eroticism.
'If I'm lucky, maybe we'll do it again…'
From the moment they crossed the line last night,
the boundaries of brother and sister had long since disappeared.