t

Si-woo headed towards the stairs to go back to his room. As he ascended, Se-hee, now in her school uniform, was coming down from the second floor.

Her breasts strained against the blouse under her jacket, and from his angle, they were perfectly in view.

His cock was still hard, proudly tenting his pants. It was too late to hide it.

Se-hee sighed softly and reached out to tap his head with her fingers.

"Just take care of it quickly," she whispered before walking past him.

Embarrassed, Si-woo hurried up to his room.

As Si-woo walked into his room, he pulled Se-hee's panties from his pocket. The way she had told him to "deal with it quickly" was both embarrassing and thrilling for him.

Did Se-hee know Si-woo was planning to masturbate with the panties she had left out that morning? At the very least, their mother would find out.

When his mother handed Se-hee her allowance, she avoided looking into Si-woo's eyes. Even when Si-woo's hand brushed against her ass, she blushed and looked away.

Si-woo felt a surge of excitement and curiosity. What would happen if he talked to his mom about last night?

With a racing heart, Si-woo picked up his phone and typed out a message to his mother.

Si-woo: Mom

Mom: Yes, dear?

Her response was swift.

Si-woo: Thank you.

Mom: For what?

Si-woo: For giving noona her allowance.

It was a small thank you for following his request. Si-woo remembered tracing those words on his mom's sensitive ass last night. She didn't respond immediately. About ten seconds later, she finally replied.

Mom: Sure.

Talking to his mom about last night without any pretense made a thrilling sensation spread from Si-woo's cock.

Si-woo : Mom, are you okay?

Mom : What do you mean?

Si-woo : From what happened last night before you turned off the lights.

He was referring to when he had flicked her nipple as punishment for hitting his sister. His mother didn't respond immediately, leaving Si-woo anxious as he watched the message status change from unread to read, but no reply came.

'Is she mad? Or maybe she's just uncomfortable with this kind of conversation?' Si-woo's heart grew heavy with worry.

Then, his phone chimed.

Mom : You're so annoying!!! -_-^

Along with her message, a cute, angry emoticon appeared. Si-woo felt a rush of excitement.

His mother responded to his perverse and obscene behavior as if it were any other conversation.

Si-woo took out his cock, wrapped it in Se-hee's panties, and began furiously jerking off. He soon felt the urge to cum, and his semen spilled over the small panties, dripping onto the floor. He left the panties and the mess on the floor, knowing his mom would discover what he'd done soon enough.

After changing clothes and getting ready for school, he went downstairs to say goodbye.

"I'm off, Mom."

"Take care, son."

Seon-mi acting completely normal, as if the earlier messages had never happened. Her casual demeanor made Si-woo's cock harden again.

It felt like he had two different mothers: one during the day and another at night. And now, she could casually chat about last night without a hint of awkwardness.

***

When Si-woo stepped outside, Se-hee was waiting by the gate. Although she didn't need him to walk her to the school anymore, they didn't mention it.

Se-hee's face was slightly flushed. Si-woo felt awkward, knowing what he'd just done and seeing her now.

They stood there, each pretending to be preoccupied.

"Shall we go?"

Si-woo finally said, breaking the silence.

"Yeah."

She followed him without protest.

***

On the way to school, Si-woo reflected on how long it had been since he'd walked alone with Se-hee. Despite their frequent bickering, he felt a strong sense of duty to protect her, just like the rest of his family.

To keep the conversation going, Si-woo brought up a lighthearted topic. Surprisingly, Se-hee matched his energy, which was a rare occurrence.

"Good thing Mom didn't find out about your tattoo, or you might've been kicked out."

Si-woo joked, recalling exactly where the tattoo was hidden. He knew their mother would have lost it if she ever saw it.

"I know, right? I was so scared! Did you see me trying to cover it with one hand while Mom was spanking me? It's funny now that I think about it. But at the time, I was terrified. Heheha."

He remembered the way Se-hee's breasts had bounced under her mesh top, but he hadn't noticed her hand. Now, as he imagined her covering the tattoo, another thought crossed his mind.

'Does Se-hee noona masturbate?'

His mind wandered further.

'She's probably already had sex with some guys from her schools, especially since she joked about dieting through sex.'

These thoughts stirred a strange mix of curiosity and intrigue within him. The memory of her laughter and the playful glint in her eyes when she made that joke only added to the complexity of his thoughts.

"Do you have a boyfriend, noona? Isn't that tattoo someone's initials?" Si-woo asked, unable to suppress his curiosity any longer.

"Nope," Se-hee's fast reply, as if it were the most obvious thing in the world.

"But didn't you say you got a discount for being a couple?" Si-woo asked, puzzled.

"Yeah, we did,"

"So, you lied about being a couple to get a discount? You're so bad, noona," Si-woo teased.

"No, it's true love," Se-hee joked, still laughing.

"What the hell! You're messing with me again!"

"Why are you so curious? I'll tell you later. Right now, things are good as they are," Se-hee said with a playful wink.

For a brief moment, her playful face showed a shy expression. Si-woo decided not to press further about the tattoo.

**

On the way to Se-hee noona's school, Si-woo learned more about her than he ever had before, though many questions still lingered.

As they neared the school, Si-woo spotted a familiar face ahead: Cheol-jin.

"Hey, Si-woo! Se-hee noona! What's up with you two walking together?" Cheol-jin called out, his tone playful.

"I'll be doing this for a while. What are you doing here?" Si-woo asked, surprised to see him.

"Oh, I have some errands nearby," Cheol-jin replied, his tone suspicious.

"Cheol-jin, are you busy? Do you have a crush at our school?" Se-hee teased.

"Something like that. Ha-ha. Let's go together," Cheol-jin suggested, though his behavior was strange.

"Okay, I'll go in now. Thanks, Si-woo. Bye, Cheol-jin!" Se-hee said as she entered the school.

As Si-woo and Cheol-jin headed to their own school, Si-woo shared what had happened the previous night.

"Wow, that's serious. So you're walking Se-hee noona to her school now?" Cheol-jin asked, sounding awkwardly surprised.

"Yeah, that's the plan," Si-woo said, eyeing him suspiciously.

"If your sister's in trouble, I can't just ignore it! I'll help too!"

Cheol-jin declared, his tone over-the-top. Cheol-jin was usually curious and nosy, but this level of enthusiasm was unusual.

"You were late yesterday, and then you bailed early, saying you had something to take care of," Si-woo probed.

"Yeah… I had stuff to take care of. But don't worry, I'm free now. I'll track down the bastard who harassed your sister,"

Cheol-jin declared again, though his voice wavered slightly. Si-woo noticed Cheol-jin's unease and quickly switched the topic.

"By the way, noona seems to be learning to dance recently."

"Dance?"

Cheol-jin echoed, relieved at the change of topic.

"Yeah, she's into some B-boy dance called Physical or Phoenix. Can you look it up?"

"Oh, sure."

As Cheol-jin unlocked his phone, Si-woo snatched it and ran.

"Hey, what are you doing?!"

Cheol-jin shouted, chasing after him. As Si-woo opened the gallery app, he found photos of Se-hee noona secretly taken the day before.

Si-woo's vision turned red with rage. He spun around and charged at Cheol-jin, ready to confront his so-called friend.

Si-woo threw a punch straight at Cheol-jin's face.

The force of the blow sent Cheol-jin sprawling on the ground like a discarded piece of paper.

"You crazy bastard! Of all people, how could you do that to my sister?!"

Si-woo's eyes were wild with rage as he screamed at Cheol-jin, ignoring everyone around them.

"Ah!! Time out! Time out!"

Cheol-jin, lying on the ground and clutching his face, pleaded for a break.

"Were you trying to turn her into your mom, you piece of shit?"

Si-woo grabbed Cheol-jin by the collar and yanked him up, ready to throw another punch.

"Chill the fuck out! It's not what you think!"

Cheol-jin managed to stop Si-woo's arm, struggling to hold him back.

Si-woo's anger wasn't just because Cheol-jin had taken some photos of his sister, Se-hee. It was because it was Cheol-jin. Si-woo knew exactly how Cheol-jin treated his own mother.

"Stop overreacting! How the hell would I turn Se-hee into my mom? What do you think I am, some kind of playboy!?"

Cheol-jin's frantic words made Si-woo pause for a moment.

Still fuming, Si-woo followed Cheol-jin as he led him into a quiet alley in the residential area.

"Fuck, I think my cheek's split open!"

'Ptoo!'

Cheol-jin spat out two white pieces along with blood. He had broken a molar.

Seeing the broken teeth, Si-woo felt a pang of guilt and asked, "Are you okay?"

"Do I look okay? What do you think? You punch me out of nowhere and then ask if I'm fine? What kind of bullshit is that? Hit first, ask later? You can't just fucking punch someone out of nowhere, dammit!"

Cheol-jin retorted angrily, clutching his jaw.

"Shouldn't you go to the hospital?"

Feeling a regret, Si-woo asked.

"No way! It's just a couple of broken teeth!"

Cheol-jin tried to play tough, waving off the concern.

"I'll be fine."

Si-woo watched Cheol-jin for a moment before speaking again. "You were the one following my sister early in the morning, right? What's with the pictures? Were you stalking her?"

"Stalking? Are you an idiot?" Cheol-jin shot back, unapologetically. "You crazy fuck, I was keeping an eye on her! Don't you want to know who she might be screwing around with, without a care in the world?"

"What the hell are you talking about?" Si-woo asked, bewildered.

"You told me, remember? 0135!"

It seems like Cheol-jin had overheard Si-woo mentioning that Shin-bi and Se-hee were considering a sex diet. Determined to find out more, Cheol-jin made up his mind and secretly followed them.

Cheol-jin figured that if if they considering sex as part of their diet, it would involve multiple partners or or sleeping with men known for their strong sexual stamina. If they had a partner like that, it likely wouldn't be a normal relationship.

In his twisted logic, it could only mean group sex or partner swapping, which meant there had to be someone leading it.

So, he follow Se-hee secretly to confirm his suspicions.

"….Then why were you taking pictures?"

"That's my hobby!"

Cheol-jin's blunt honesty left no room for doubt.

Though Si-woo's suspicions about Cheol-jin were cleared, he was left with a bitter feeling. He had never seriously thought about his sister's private life; he had only a vague sense of what might be happening.

Now, a sticky, unpleasant heat bubbled inside him, causing a feeling of suffocation.

***

With bitter emotion, Si-woo walked silently toward the school.

Suddenly, his smartphone buzzed. The sender was Cheol-jin, who was walking right next to him.

"What is it?"

Si-woo asked indifferently as he unlocked his phone.

"I feel bad for not telling you, so I'm sending you some photos of Se-hee noona I took. And the last one is a surprise. Don't be too shocked."

Si-woo opened the message and found several photos of his sister from the past couple of days. Her beautiful face, full breasts, and well-toned body were all perfectly captured, almost like a work of art.

As he scrolled through the photos, mesmerized, he suddenly stopped, his breath catching in his throat.

The last few images were of a document titled "Slave Contract," accompanied by several pictures of Gyu-ri, Si-woo's mother. In each photo, her mouth was open, filled with semen.

Heart pounding, Si-woo looked at Cheol-jin in shock. Cheol-jin met his gaze with a satisfied smile, despite his swollen face.

"Are you finally doing this kind of stuff with your mom?" Siwoo asked, feeling a strange excitement.

"No, no, it's not what you think!" Cheoljini shook his head, waving his hands. "Look carefully. How old do you think my mom looks in these photos?"

Si-woo examined the photos again. Gyu-ri's face looked different in each one, varying in age. As he scrolled back, it felt like he was traveling through time, from recent photos to much older ones. The youngest photo of Gyu-ri made her look almost like a teenager.

Si-woo carefully read the contract at the beginning. The first line stated, "Kim Kyu-Hyung owns Park Gyu-ri as a slave." Kim Kyu-Hyung was Cheol-jin's father, and Park Gyu-ri was indeed Gyu-ri.

The contract detailed numerous terms of ownership and was signed by both parties, dated over 20 years ago, long before Cheol-jin was born.

Looking up at Cheol-jin again, Si-woo saw the same smug smile.

"I found this a few days ago, hidden in my dad's old briefcase. I took pictures immediately."

Cheol-jin spoke like he was boasting about a trophy, sharing details without being asked.

"On the back, there are records of long-term rentals, about six times. I think the photos of her with semen in her mouth are from those times, taken instead of signatures."

Si-woo was too stunned to respond to Cheol-jin's words.

"The renters' names and details are listed there. Guess what I found?" Cheoljini smirked mischievously.

Siwoo turned the page. Under the title "Slave Rental Contract," he saw names, personal details, and rental periods.

One name stood out, written twice: "Yoo Jin-Sung."

It was Siwoo's father .

***

Even after arriving at the academy, Si-woo was in a daze. He couldn't calm down.

He had known Gyu-ri as someone who rented out her body, but discovering that his father had rented her twice was a shock.

The rental periods were not short, and Si-woo realized that two of the photos must have been of his father's semen in Gyu-ri's mouth.

The fact that such a contract existed and was maintained was more shocking than the infidelity itself.

Si-woo suddenly wondered if his mother and her friends, who had been close since childhood, knew about this. If Cheol-jin hadn't told him, he wouldn't have known either.

Lost in thought, Si-woo thought about his mother. The idea of having a slave contract with her made him shiver. But he doubted she would agree to such a thing now. She secretly had sexual interactions with him, but that didn't mean she saw him as her master.

Perhaps she was just indulging his desires, as one would indulge a child's whims.

Si-woo wanted to find out how far his mother would go for him.

While he was deep in thought, Shin Seul-Gi approached him.

"What's got you so deep in thought?"

Seul-Gi, Shin-bi's younger sister, was known for her eccentricity at the academy. She often recreated lewd sounds with her chair and made explicit puzzles and quizzes, earning her the title of "pervert beauty."

"Did you fight with Cheol-jin?"

She asked, holding a bag of sweet rice cakes labeled "Sweet Bean Powder."

"It wasn't a fight, just a little bickering."

Si-woo replied, trying to downplay the situation.

"Don't be too hard on Cheol-jin. Poor guy."

Seul-Gi said with a dramatic tone, sounding like she was in a movie.

"Jeez, it's not like that."

Feeling unjustly accused, Si-woo felt tightness in his chest. Suddenly, he remembered his conversation with Se-hee about tattoos.

Se-hee had said she didn't have a boyfriend. What about Shin-bi, who had gotten a couple's discount on tattoos?

Si-woo hesitated, wondering if he should ask Seul-gi. Just then, she spoke again.

"I don't know what you're worried about, but I'm sure it'll be okay."

With a warm and bright smile like the breath of the Virgin Mary

After school, Si-woo headed to pick up Se-hee from her academy. He had already figured out that Cheol-jin was the culprit but hadn't mentioned it to Se-hee yet.

The diet method Shin-bi had revealed was far too sophisticated for a regular high school student to easily come up with and execute.

Si-woo suspected that there was a mastermind behind this, just as Cheol-jin said. The mastermind was mostly likely someone with a connection to Se-hee or Shin-bi.

"I'll send you the address. Just find your way here!"

Se-hee said casually over the phone before hanging up and texting him the location.

The address led him to a dessert café near her academy.

The café had a charming, cozy vibe with large windows that allowed a clear view inside. Peering through the window, Si-woo spotted Se-hee and her friends gathered around a table.

One of them, Shin-bi, noticed him and waved.

Feeling relieved at seeing Shin-bi, Si-woo entered the café. Se-hee, Shin-bi, and three other girls he recognized from the park the previous day were seated around a table.

"Si-woo, come sit here~!"

Shin-bi called out, gesturing for him to sit between her and Se-hee.

Si-woo greeted the girls with a polite bow and took the seat Shin-bi had arranged for him.

"Hey, Si-woo!"

"Hi there~"

"Welcome~"

The girls greeted him in turn. Unlike the previous day at the park, they were now dressed neatly in their school uniforms, likely due to the proximity of their academy.

"Do you remember us?" asked the girl in the middle, who had worn her uniform provocatively with three buttons undone the day before.

"Uh… yes, from the park…" Si-woo stammered, the memory of her first impression making him nervous.

"Ah, so you do remember," she said, smiling brightly. Her name was Yoon So-Ra, and the girls beside her were Kang Se-Mi and Jung Sae-Rom.

"So, what's up, Se-hee noona?" Si-woo asked awkwardly after the introductions.

"Oh, nothing much. We just thought we'd grab some cake together since you were already coming," Se-hee replied nonchalantly.

Si-woo stayed, eating the cake and drinking the beverage Se-hee had bought for him. It seemed like they had no specific reason for inviting him to the café. He mostly answered the girls' questions and occasionally joined in on topics he knew something about, like the boys at their academy, clothes, makeup, and celebrities.

When Se-hee went to the restroom, Si-woo seized the opportunity to speak quietly to Shin-bi.

"Noona, I think I know the answer," he whispered.

"Really? I thought you'd call me because you were curious. Did you figure it out on your own?" Shin-bi replied, surprised.

"Do you want me to write it on your palm?"

Shin-bi extended her hand, and Si-woo slowly traced the letters "S E X" on her palm.

"Is that it?"

Si-woo asked nervously.

Shin-bi's face turned a shade redder as she smiled and nodded slightly.

"But do you think that method really works?"

"I'm not sure. I just thought it might be."

Si-woo admitted.

"Well, you got it right, so I guess you deserve a reward," Shin-bi said, her face flushing even more as she fidgeted with her smartphone.

A notification beeped on Si-woo's phone. As he reached to check it, Shin-bi stopped him.

"Not now. Look at it later, in private."

"Later?"

Si-woo repeat.

"Yes, later. And don't show it to Se-hee, okay?"

Shin-bi insisted.

Shortly after, Se-hee returned, and the group chatted about various topics before Si-woo and Se-hee eventually headed home.

***

On the way home

The sky was clear and sunny. The warm and fresh air enveloped everything like a small afternoon gift.

Today, Si-woo and his sister, Se-hee, walked side by side like close siblings or even lovers.

"Who did you like the most among the people at the store earlier?" Se-hee suddenly asked.

"What do you mean?"

Si-woo puzzled by the unexpected question.

"Who looked the prettiest to you?"

Se-hee clarified.

"Of course, it's you, Se-hee noona!"

Si-woo answered without hesitation, as if it were the most obvious thing in the world.

Se-hee seemed momentarily taken aback before speaking again.

"No, I mean, if you had to date someone, who would it be?"

"Date someone? Where's this coming from?"

Si-woo replied, confused.

"Just answer the question!"

"Um… then Shin-bi noona, I guess?"

Se-hee gave Si-woo a surprised look.

"Shin-bi?"

"Yeah, she's close to you, she's pretty, and her tone and personality are gentle. I think she'd match well with me," Si-woo explained.

"You've known Shin-bi for quite a while, right?" Se-hee asked, still looking thoughtful.

"Yeah, I guess so…"

"Hmm, I see," Se-hee murmured to herself, nodding as if coming to some conclusion.

"Why do you ask, though?" Si-woo inquired.

"Oh, it's nothing," Se-hee replied with a playful smirk, then added, "But you think I'm the prettiest, right?"

"Uh… yeah…" Si-woo stammered, feeling a bit flustered.

"I'm tired today, so I'm going to lean on you," Se-hee said, linking her arm with Si-woo's and resting her head on his shoulder.

Si-woo's height was perfect for Se-hee to comfortably lean her head on his shoulder. Her large breasts pressed against his arm, and Si-woo could feel his cock slowly starting to harden.

Feeling embarrassed, Si-woo gently pushed Se-hee away. "Hold on, Se-hee noona," he said, turning his back to her and taking off his jacket to cover the front of his pants.

After readjusting himself, he turned back to Se-hee, wearing a sheepish smile. Se-hee, who had been watching the entire process, let out an amused chuckle and linked her arm with his again.

"Men really do have it tough," Se-hee said sympathetically as they walked.

Suddenly, recalling something, she burst out, "But seriously, Si-woo, isn't it a bit much how often this happens to you? Don't you think you should see a doctor?"

"Hey, if it weren't for mom, you, and Se-young always being around, it wouldn't happen so often!" Si-woo retorted, raising his voice in frustration.

Realizing he had included Se-young, Si-woo instantly regretted it.

"Hmm?" Se-hee looked at him thoughtfully, as if she had picked up on something.

Then, with a mischievous grin, she asked, "So, Si-woo, who do you think is prettier: Mom or me?"

Caught off guard by the question, Si-woo stammered, "Wh-what kind of question is that?"

"You said I was the prettiest among our friends. How about compared to Mom?" Se-hee pressed, her curiosity seemingly endless.

"You look pretty because you take after Mom."

Si-woo replied, thinking it was a smart answer.

"Is that so?"

Se-hee asked, not entirely convinced.

"Yeah, that's it," Si-woo said, still feeling awkward.

Unconvinced by his answer, Se-hee leaned closer, her voice dropping to a whisper.

"So, who do you think of more when you masturbate?"

Si-woo's face turned bright red, and he quickly looked away.

"How would I know? I don't count or anything."

As he tried to push her away again, Se-hee tightened her grip, pressing her breasts even more firmly against his arm.

"So, you do think about us when you do it? Mom and me? And so often you can't keep track? Heheheh~"

Se-hee teased, clearly enjoying his discomfort.

Si-woo groaned in frustration, his head hanging low. The way Se-hee enjoyed teasing him so mercilessly stirred something deep within him—an unexpected and shameful desire to dominate her.

"Keke. Si-woo, I should really find you a girlfriend soon," Se-hee said softly.

Hearing those words, Si-woo felt an inexplicable sense of emptiness and loss.

The emotional connection and warmth between them seemed to evaporate, leaving him feeling cold and hollow.

As Se-hee clung to Si-woo's arm, they paused in front of the park restroom on their way home. Si-woo's huge cock was painfully obvious, straining against his pants.

Se-hee looked up at him, concern evident in her eyes.

"A-are you really okay like that?"

"Huh?"

"I mean, we're going home together. If mom sees you like this, she'll definitely think something's up. Your pants aren't exactly hiding it…"

Se-hee's eyes were locked onto the bulge in Si-woo's pants, unable to look away. Si-woo, caught off guard and struggling to conceal his erection, shifted uncomfortably.

Her face was flushed, clearly affected by the situation as well.

Si-woo figured his mom might not even care at this point—or maybe he'd just get scolded—but right now, all he cared about was relieving the overwhelming need to cum.

His eyes had been glued to Se-hee's huge breasts, pressed against his arm, since they started walking.

"I feel a bit sorry that it turned out this way because of me, but don't look at my breasts so intensely like that."

Si-woo, unable to respond, just turned his gaze away before sneaking glances at her chest again, breathing heavily.

Se-hee, noticing Si-woo's struggle, sighed and pointed to the restroom.

"Just go in there. I'll wait for you."

It was awkward having his sister concerned about his jerking-off schedule, but Si-woo was too turned on to care. He quickly ducked into the men's room.

Alone, he managed to catch his breath and calm down a bit. The two stalls were out of toilet paper, which Si-woo knew from experience would make cleanup a hassle.

He stepped back out, looking sheepish.

"Uh, Se-hee noona, do you have any tissues?"

Without meeting her eyes, Si-woo ask his sister.

"No, I don't. There's no toilet paper in there?"

Se-hee, noticing his plight, shook her head.

"Uh… okay… okay.."

Si-woo was about to head back in when Se-hee stopped him.

"Wait a sec."

She went into the women's restroom, and Si-woo, thinking she was fetching some toilet paper, waited gratefully. When she came out, she slipped something into his uniform pocket.

"Use this."

Her voice was slightly embarrassed.

Si-woo returned to the stall, his curiosity piqued. He reached into his pocket and pulled out a small, damp piece of cloth.

His face burned when he realized —it was Se-hee's panties, soaked with her juices. The thought of her standing outside without underwear made his cock throb even harder.

He brought the panties to his nose, inhaling her intoxicating scent, feeling his head swim. Taking out his smartphone, he opened a photo Cheol-jin had sent of Se-hee. Wrapping his cock with her slick panties, he imagined her standing outside, bare underneath her skirt, waiting for him to finish jerking off.

He fantasized about forcing his throbbing dick into her wet pussy, her body trembling with pleasure. The image of her bouncing breasts and the sound of her desperate moans filled his mind.

Switching to a picture of Gyu-ri in her teens, cum dripping from her mouth, Si-woo's fantasies grew wilder. He imagined Se-hee taking his load in her mouth, her eyes filled with lust.

Overwhelmed with excitement, Si-woo came hard into Se-hee's panties.

**

After cleaning up, Si-woo stepped out of the restroom. Se-hee stood outside, her back to the door, her face flushed. Si-woo approached, gently tapping her head.

Surprised, she turned to him with a half-amused, half-annoyed look.

"Make sure to wash that and hide it from Mom."

"Got it. But, noona, are you really okay with this? With me… using your underwear for… this?"

Si-woo wanted to make sure she was okay with what had just happened.

Se-hee looked at him intently and sighed, her cheeks turning even redder.

"You're so funny~. Didn't you take my panties this morning? Didn't you handle it with those?"

You… you knew?"

Si-woo stammered, clearly caught off guard.

"Of course I knew. Do you think Se-young doesn't know either?"

Her last comment made him a bit nervous, but he felt a strange sense of satisfaction. Walking home with Se-hee, he couldn't help but feel content with the new, albeit awkward, experience.

***

"Mom, we're home!"

Se-hee and Si-woo stepped into the house.

"Why are you two coming home together?"

Seon-mi asked from the kitchen, peering toward the entrance.

"We met up just around the corner."

Se-hee responded, keeping the incident where she was stalked and Si-woo's efforts as her secret bodyguard out of the conversation.

"Really? Change your clothes and wash your hands. I've got strawberries ready."

Their mom's cheerful voice was just as usual.

"Okay, we'll be right down."

They both headed to their rooms.

Si-woo entered his room to find it spotlessly clean. The panties he had stained with his cum that morning and the floor were all tidied up. He felt a strange sense of pride, almost as if his mother acknowledged him as a man.

He had left his cum-stained panties for his mom to see, and she had cleaned them up without a word. She pretended not to notice.

What did his mom think about it? Despite his incestuous behavior, she acted like nothing was wrong.

At night, she seemed to enjoy it, pretending to be asleep while he had his way with her. Even when he revealed his lust for his family and touched her ass during the day, she didn't get angry. It was almost as if she was inviting him to do more at night.

How far would his mom let him go? Was she like Gyu-ri?

Si-woo wanted to find out. He opened the photos he had taken of Gyu-ri, which he had promised never to show anyone. In one photo, she was in a yoga pose, her upper body pressed to the floor with her ass raised high, his hand resting on it. What would his mom think if she saw it?

Back then, he had been terrified of getting caught by his mom. Now, he wanted her to see it. He wanted to see her reaction.

Taking a deep breath, Si-woo sent the photo to his mother. The '1' next to the photo disappeared, showing she had seen it.

Mom: ?

A question mark was her response.

Si-woo: It's Aunt Gyu-ri.

There was a long pause before his mom responded.

Mom: When?

Si-woo: When I borrowed her blindfold.

Mom: Did you do it?

His mom's question was direct. She was undoubtedly referring to sex. For the first time since that night, his mom was asking direct questions. Si-woo's body heated up; his heart raced.

Si-woo: Not yet.

Mom: Okay.

Her response was calm, almost accepting.

Si-woo: Are you mad?

There was another pause before she answered.

Mom: I'm not mad.

Si-woo: Thanks, Mom. See you later.

Mom: Okay

Si-woo felt his body tremble with excitement from the short exchange.

'I want to cum in her mouth, on her tits, in her pussy. I want to make her submit to me as a woman.'

This was his pure desire toward his mother.

***

Reflecting on the conversation with his mother, Si-woo remembered the file he had received from Shinbi earlier at the dessert cafe.

She had insisted he look at it alone.

It was a reward for correctly guessing the answer to 'SEX.'

Si-woo opened the file on his smartphone. Inside was a photo of a pair of pale, plump thighs. It was a familiar sight. It was the inner thigh of Shinbi where she had written 'SHY' in English letters.

He immediately recognized it as Se-hee's initials—Yoo Se-hee.

Si-woo headed downstairs, where his sister and their mother were sitting at the dining table, eating strawberries.

"Si-woo~ come have some strawberries. They're super sweet; no need for sugar!"

Seon-mi called out, smiling as she saw him coming down the stairs.

Playing the part of a normal family, Si-woo responded, "Where's Se-young?"

"She's at your auntie's place."

"Aunt Seon-ju's? Why?"

"She's checking out some schools with Sua,"

Sua, Seon-ju's daughter, was the same age as Se-young.

"Schools?"

Si-woo hadn't heard anything about this before.

"Yeah, remember Se-young went to the hospital? They said it would be good for her to do activities she enjoys. She's always liked magic since she was little, and Seon-ju knows a good magic academy. So, I told her to take Sua and check it out."

Suddenly, something else came to Mom's mind.

"Oh, right. Gyu-ri and Seon-ju are coming over for lunch tomorrow."

Tomorrow is Saturday, which means no school.

A perfect time for a family gathering.

Back when Si-woo's father was alive, they often hosted meals or traveled together on weekends. Since the accident, these gatherings had become less frequent.

"Gyu-ri and Seon-ju will probably leave after lunch, so I thought we could go out for dinner as a family and maybe buy Se-hee some clothes. How does that sound?"

"Sounds great, Mom!"

Se-hee responded enthusiastically,

"Ah… whatever."

Siwoo felt a bit tense at the mention of Gyu-ri coming over for a visit.

Seon-mi continued chatting about their plans and other daily matters. Si-woo listened to her cheerful voice, thinking about last night's events.

Despite everything, they were still mother and son. He remained cautious, fearing they might cross a line that couldn't be undone.

So far, his interactions with his mother have been limited to light petting, provocative touches, and explicit chats. Things that an open-minded mother might tolerate to address her son's sexual needs.

That afternoon, Se-hee's panties were noticeably damp. Would he see Seon-mi's wet side today as well? He was curious to see where this new path would lead.

***

Night had fallen….

After Se-young returned home…

After dinner…

After a shower…

It was the time when the family would be asleep.

Si-woo had something rather provocative in mind for Seon-mi tonight. Entering the master bedroom right on time, the door was open,and so was her breast, as usual.

Si-woo's cock was already hard.

With a determined stride, Si-woo gently carried Se-young to her room, making sure she was comfortable before heading back to the master bedroom

"Mom"

Si-woo called out softly, carrying a hint of longing. As expected, there was no reply. He had grown used to her silence, taking it as unspoken consent.

Tonight, he gently pushed her onto her back. Climbing onto the bed, he took one of her nipples into his mouth, the same one Se-young had been sucking. His other hand cupped her other breast. He swirled his tongue around the nipple, feeling it harden in his mouth.

Si-woo swirled his tongue around her nipple, taking his time with every caress. Seon-mi's breathing grew heavier, her chest rising and falling under his touch. His lips moved from her nipple to her neck, trailing soft kisses up to her cheek and ear. As he alternated between her chest, neck, and face, he felt her body begin to tremble.

Curious, Si-woo decided to check her underwear. He opened her light purple gown and looked down, noticing a clear, slick trail of fluid running down her inner thigh. It didn't make sense—he had only started caressing her after laying her on her back. This must have flowed while she was lying on her side.

Si-woo realized then that Seon-mi had been waiting for him, unable to control her arousal. Her wetness betrayed her, leaking down her thigh. She was pretending otherwise, blindfolded, deceiving not only him but herself, letting her lust flow freely.

With no more reservations, Si-woo slipped his hands under her waist, lifting her slightly as he gently slid her panties down to her knees. He freed one leg, leaving the panties around her other ankle.

Si-woo bent her legs at the knees, spreading them apart, and positioned himself between her thighs. He slipped his hands under her spread thighs, wrapping his arms around them, and brought his mouth to her pussy, feeling her wet, parted flesh.

She was soaking wet. He extended his tongue, tasting her, the bland yet intoxicating flavor flooding his senses. He spread her further, feeling her hips and legs tremble, caught between wanting to close and open.

He licked her from bottom to top, feeling her body respond. Her breath hitched, and her body trembled. Her hips and legs quivered, caught in the intense sensations he was creating, unable to fully close or open.

Si-woo's touch grew more confident and assertive with each passing moment. The taste of her arousal spurred him on, and he explored her with increasing enthusiasm, his tongue parting her labia and delving into every inch of her, drawing more intense reactions.

Seon-mi was losing control. Though she had been silent, her breath and body betrayed her. Si-woo paused, feeling her quiver. Her legs and hips shook violently, her body hot to the touch. She was clearly at the peak of her pleasure, but he wasn't done yet.

His tongue found her clit.

As he flicked his tongue over her sensitive spot, Seon-mi's body shuddered violently. He licked her clit persistently, causing her hips to jerk and spasm uncontrollably.

Smack!

He released one of her thighs, spread his palm, and slapped her ass hard.

"Stay still!"

Si-woo command her firmly, and her body froze, the sharp stinging sensation from his slap still lingering.

"Haah… haah…"

Her hips lifted off the bed, and she was almost crying, breathing rapidly.

"Seon-mi, you can't let me know you're awake."

Her body trembled again at his words.

"This is your reward for being good girl today."

With that, Si-woo resumed sucking on her clit. Seon-mi convulsed several times, each accompanied by a firm spank. She was now accepting the intense stimulation of Si-woo's cunnilingus, her body yielding to the overwhelming pleasure.

It was overwhelming, but she lay limp, almost unconscious, unable to resist the physical pleasure as Si-woo had instructed. Despite her extreme mental effort to endure, the tremors from deep within her womb spread throughout her body like an earthquake.

Seon-mi came hard, her whole body convulsing. Her pussy contracted, releasing her pent-up orgasm. Si-woo drank her cum, savoring the taste of her flowing nectar on his tongue.

"Uuugh… haaaah… haaaah~!"

She experienced an unprecedented peak of pleasure. Seon-mi's orgasm, brought on by Si-woo's tongue, was unlike anything she had ever felt before. Not even with her late husband.

He traced her folds with the tip of his tongue, exploring every contour. She panted heavily, her hips jerking. He moved his mouth from her pussy to her thigh, kissing her sensitive inner thighs, licking them softly.

**

Seeing Seon-mi convulse in orgasm, Si-woo had only one thought: Gyu-ri's photo.

Kneeling in front of his blindfolded Seon-mi, he roughly groped her breast while shaking his massive cock with his free hand.

'Slap, slap, slap, slap'

The sound of his masturbation was clear in Seon-mi's ears. The pleasure from Si-woo's hand squeezing her breast was intense.

"Seon-mi, open your mouth."

He commanded her with a husky tone.

Slowly, her lips parted. Si-woo pushed the large head of his cock into her open mouth, stroking his shaft as he felt the wetness of her tongue on his tip. He can feel himself getting closer to climax.

"Ah, Seon-mi, I'm gonna to cum!"

It was his third ejaculation of the day, but there was enough to fill her mouth.

"Keep it in your mouth, don't spill it!"

He instructed, even as he came.

She held her mouth open, receiving Si-woo's cum. After finishing, he went to his room to get his smartphone. Seon-mi still held the cum in her mouth as instructed.

Si-woo aimed his smartphone and took a picture, the flash illuminating the cum in her mouth. He suddenly pulled up her blindfold. Her face turned red like a tomato, and she flinched in surprise, her eyes squinting shut, showing the cum in her mouth.

Her breathing grew more intense.

Click! Click!! Click!!!

The camera shutter sound echoed coldly.

"That's enough, Seon-mi."

Si-woo said, reaching for a tissue to give her. But at that moment, unable to hold back, she swallowed his cum.

"Gulp, gulp… ugh… cough, cough!"

She gagged and coughed as she swallowed.

Si-woo found her incredibly endearing.

He stroked her hair as she lay there, eyes shut tight, body trembling.

He put the blindfold back on her, covered her with a blanket, turned off the light, and left the master bedroom to return to his own room

On the next Saturday morning, before the first light of dawn had touched the sky, Si-woo stepped out of the shower, still feeling the buzz from his early jog with his sister, Se-hee.

As he walked into the kitchen, he noticed his mother, Seon-mi deep in thought, busy preparing breakfast. Something was off; she seemed distant, her mind clearly elsewhere.

Startled, she glanced up as Si-woo walked in.

"S-Si-woo, just finished your shower?"

Her voice, trying to sound normal, came out strained and awkward.

The taste of Si-woo's cum still lingered in her mouth. It had filled her completely.

"Yeah, Mom. Did you sleep well? Are you making breakfast?"

She paused, her hands gripping the edge of the countertop.

"Yes, of course," she said, a beat too late. "I was just about to start breakfast. Did you go jogging with Se-hee again?"

As Si-woo heard his mom's tense voice, a strange mix of relief and unease settled in him.

"We did. Se-hee noona woke me up. It's not a bad way to start the day. But where's Se-young?"

Se-young, who usually helped with breakfast, was noticeably absent.

But his mother didn't respond at all, almost like she was lost in her own world.

He watched Seon-mi closely, noticing the stiffness in her shoulders, the slight tremble in her hands as she reached for a pan. A pang of guilt hit him, maybe even pity. But underneath it all, he couldn't deny the thrill, the sense of power that came with the shift in dynamics.

Drying off his hair, Si-woo felt an unexpected calm wash over him. It was as if everything had changed, leaving him both excited and a little uneasy.

After a moment, as if finally registering his question, his mom finally responded.

"S-she went to study with Aunt Seon-ju yesterday and came back exhausted. Since it's the weekend, I thought I'd let her sleep in."

Seon-mi's voice unsteady and avoiding direct eye contact.

Trying to keep the conversation going, Si-woo continued: "So, what's for breakfast?"

"Ham fried rice…."

Her gaze still shifting nervously.

"Sounds delicious, Mom."

Si-woo couldn't ignore the tension in her voice.

He decided to head upstairs, to give his mom some space.

***

Later that morning

Si-woo came back downstairs, timing it with the completion of breakfast preparations.

At the dining table, only Se-hee and Se-young were seated.

"Where's Mom?"

Si-woo asked, noticing his mom's place setting was absent.

"Mom said she was tired after making breakfast and went back to her room. She told us to eat together when you came down," Se-young answered.

It seemed that after her earlier reaction, facing Si-woo and having a meal together felt too uncomfortable for her.

After finishing the fried rice his mom prepared, Si-woo sat on the living room sofa.

He opened his smartphone and secretly checked the photos he took yesterday of his mom.

Her blindfold was off, eyes tightly shut, mouth open, and filled with Si-woo's cum.

Her face flushed red, likely from the blood rushing to her head.

In hindsight, despite the enjoyment at the moment, it must have been a deeply humiliating experience.

Having her clit sucked, her ass spanked, and swallowing her son's cum—these were incredibly degrading acts, especially with her own son.

Is his mom feeling confused?

Is she blaming herself for pretending to be asleep while participating in her son's actions?

Si-woo opened the messaging app and sent a text to his mom.

'Mom, are you sleeping?'

Later that morning, Si-woo descended the stairs just as breakfast was ready. Seated at the dining table were Se-hee and Se-young. Noticing that their mother was absent, he asked, "Where's Mom?"

Se-young glanced up at him.

"Mom said she was tired after making breakfast and went back to her room. She told us to eat together when you came down."

It seemed that after her earlier reaction,sharing a meal with Si-woo felt too awkward for her.

After finishing the fried rice his mother cooked, Si-woo moved to the living room and collapsed onto the sofa.

He unlocked his smartphone and, keeping it low, began scrolling through the explicit photos he'd taken last night—images that showed his mother in highly compromising and intimate positions.

In the images, her blindfold was removed, her eyes tightly shut, and her mouth open, filled with Si-woo's semen.

Her face was flushed, likely from the rush of blood to her head.

In hindsight, despite the enjoyment at the moment, it must have been a deeply humiliating experience for her.

To have her most intimate areas stimulated, her ass spanked, and to swallow her own son's semen—these were profoundly degrading acts, especially given their familial relationship.

Si-woo wondered about his mother's emotional state. Was she feeling confused? Was she blaming herself for feigning sleep while participating in her son's actions?

He opened the messaging app and sent a text to her.

Si-woo: Mom, are you okay? Are you sleeping?

Mom responds quickly.

Mom: No.

Si-woo: Are you okay?

Mom: Yes.

Si-woo: Are you feeling unwell?

Mom: I said I'm fine!

Seon-mi's carried a hint of irritation as she answered the repeated questions.

Si-woo: Is it because of what happened last night?

He asks directly.

Mom: Why do you keep texting me?

She avoids the question.

Si-woo: Because I'm worried about you.

Si-woo genuinely cares for his mother.

There's a long pause.

Mom: I feel a bit embarrassed.

She expresses her feelings for the first time.

Si-woo: Why?

Mom: I don't know -_-^

She sends an annoyed emoticon.

Si-woo: Mom.

Mom: What?

Si-woo: You're cute.

He finds her reactions adorable.

Mom: Stop teasing me.

She's clearly flustered.

Si-woo: You were cute when you were asleep last night too.

He teases her playfully.

Mom: Do you want to get punished?

Her response is indignant but cute.

Si-woo: Like how I punished you last night?

He continues to tease her.

Mom: Ugh!

Her typical response when cornered.

Si-woo: Ha ha, look, Mom, I told you you're really cute!

He genuinely sees her as adorable.

Mom: Oh, where do you even learn these things?

She sighs.

Mom: Were you trying to kill me with embarrassment last night?

She openly references the previous night.

Si-woo: I enjoyed it, but did it make you uncomfortable?

He asks worriedly.

Mom: No, I wasn't uncomfortable…

She trails off.

Si-woo: Then what?

Mom: Never mind!!!

She's clearly embarrassed.

Si-woo: Mom, come out to the living room.

He thinks the mood has lightened.

Mom: Why?

She's flustered.

Si-woo: I want to talk to you face to face.

Mom: No.

Si-woo: Why not?

Mom: After everything we've talked about, if I see your face right now…

She can't finish the sentence.

Si-woo: If you see my face?

Mom: I'll die of embarrassment.

She admits honestly.

Si-woo: I'm okay with things being normal.

He assures her they can act as usual.

Mom: Just give me some time.

Si-woo: Okay, I'll wait.

Mom: Thanks.

The chat ended, and Si-woo spent the rest of the morning sprawled out on the living room couch, casually keeping an eye on his mom's bedroom door.

Seon-mi came out once to use the bathroom.

When she saw Si-woo talking to Se-young in the living room, she blushed and quickly looked away.

On her way back, she felt Si-woo's gaze but couldn't meet his eyes, keeping her head down.

Inside the bedroom, his beautiful mother was grappling with redefining her relationship with her son. It felt like a twisted process where she, like a lust-filled female animal, was preparing to fully accept her son as her mate.

Si-woo could sense his growing dominance and his influence over their changing relationship becoming stronger with every passing moment, even with the door closed between them.

***

That morning, Se-young excitedly told Si-woo all about her visit to the magic academy with their Aunt Seon-ju and cousin Sua.

She could hardly contain her enthusiasm as she described every detail, from the amazing spells she saw to the incredible potions she learned about.

"I loved the astrology and hypnosis magic! Sua was really into the illusion magic!"

The academy had a variety of magic classes, and they even partnered with hospitals for therapeutic and counseling magic, which Se-young had enrolled in.

The academy was huge, backed by big companies, and often featured in local ads, so it was something Si-woo was already familiar with.

'As long as it's enjoyable, society has always embraced the art of pretending to be serious. Even if it involves a bit of deception, if you're skilled and can hold people's interest, you can turn it into a career.'

Si-woo thought, recalling an old advertising slogan.

A shallow slogan that leaves nothing but a bad taste.

The academy offered scholarships, study abroad opportunities, and even managed entertainment careers, attracting all sorts of aspiring magicians and performers.

With their inherited talents and good looks, Se-young and Sua seemed perfectly suited for the magical world.

Si-woo realized that if Se-young and Sua really wanted to become magical girls, he would genuinely support them.

"Even Teacher Yoo Ye-Na was there!"

Se-young added with a giggle.

Since last spring, Se-young's school had introduced an after-school magic class led by Yoo Ye-Na, who had also performed at the fall talent show. The class was a huge hit, and Se-young and Sua were disappointed when they couldn't join because it was already full.

But now, with Yoo Ye-Na taking over as the academy's headmaster, Se-young's excitement had only grown.