Chapter Index

    123

    Screams of ecstasy from Se-hee, like she was about to faint.

    She clings to Si-woo as if she’s abandoned all sense of propriety, reaching climax again and again.

    During those climaxes, Se-hee as a sister disappeared.

    Only the position and role of a complete slave were acknowledged and shared between Se-hee herself, Si-woo, and Aunt Seon-joo.

    The role-playing that started like a joke from the beginning might have just been a fictional game.

    But the feeling of climax achieved between siblings was real.

    Because it’s real, the role-playing game doesn’t end as just a game anymore.

    The absolute bond between them, tied together by the name of family, becomes entangled in a chaotic, unbridled relationship due to the climax that feels as if it’s being engraved into their very core.

    **

    While Si-woo was ejaculating inside Se-hee twice in a row, the call with Aunt Seon-joo remained connected.

    After the two ejaculations, Si-woo rests on top of Se-hee.

    Si-woo’s member, half-limp inside Se-hee, was wriggling, enjoying the afterglow of ejaculation.

    As the languid afterglow of ejaculation faded, Si-woo picked up the smartphone he had tossed beside Se-hee’s head.

    “Seon-joo… Aunt?”

    Si-woo calls out to Aunt Seon-joo as if confirming the connection.

    “Yes, honey~ I’m listening. I think I’m really wet right now. Did you cum inside Se-hee both times?”

    Aunt Seon-joo asks Si-woo, as if to confirm that she didn’t miss a single sound of the lewd intercourse created by the siblings.

    “Yes, both times! I’ll cum inside you a lot later, Aunt.”

    Si-woo was saying to Aunt Seon-joo, feeling proud of himself.

    “Really? Just thinking about putting yours inside me already makes my insides feel like they’re throbbing~ What if I actually get pregnant?”

    Aunt Seon-joo’s voice is excited.

    “What do you mean, what if? You can just give birth to her as Soo-ah’s younger sibling! So, what time are you coming today?”

    Si-woo speaks half in jest, but feeling slightly embarrassed, he quickly changes the subject.

    “I’m thinking of taking Se-hee on a date before I see you today, so I’ll probably arrive around dinner time.”

    At the word “date,” Si-woo recalls the video of the family gathering trip from early summer last year that Aunt Seon-joo had sent him.

    The shocking video showing Aunt Seon-joo sucking on Soo-ah’s vagina.

    Perhaps Aunt Seon-joo has the same inclinations as Se-hee.

    For a moment, Si-woo imagines Aunt Seon-joo sucking Se-hee’s vagina, feeling a dizzying sensation.

    “Really? But what kind of date?”

    “To get medicine too. Se-hee must be exhausted from being tormented by you all night~ And to refresh her mood. Is that okay?”

    “Ah… well, it doesn’t matter, but what are you going to tell Mom?”

    Si-woo was asking to finalize the things that would happen with Aunt Seon-joo tonight without any changes.

    “Hmm~? Should I get permission from my sister to date you before I go~?”

    Aunt Seon-joo makes a joke that doesn’t sound like a joke, with a playful tone.

    “Wh… what are you talking about!?”

    Si-woo sounds panicked.

    “Just kidding, just kidding~ Keek. You meant I should pretend I don’t know to my sister, right?”

    Aunt Seon-joo was speaking as if she remembered Si-woo’s instructions from the previous day.

    “Don’t worry~ honey. I’ll tell my sister I’m late because of work. What do you want to eat for dinner? I’ll buy it on the way in with Se-hee~”

    Following that, Aunt Seon-joo reassures Si-woo and asks him to choose the dinner menu.

    Si-woo orders the chicken porridge he had eaten the day before from Aunt Seon-joo.

    Si-woo was slightly uncomfortable with Aunt Seon-joo’s playful joke, but he imagined Aunt Seon-joo scooping up the chicken porridge with a spoon, along with his own semen sprinkled on top, and suppressed his excitement as he brushed off Aunt Seon-joo’s joke.

    **

    After finishing the call with Aunt Seon-joo, Si-woo lies back down on top of Se-hee.

    Si-woo’s penis had already swollen full, tightly widening Se-hee’s vaginal opening.

    Se-hee reaches out to Si-woo, asking for the smartphone after he finished the call.

    Se-hee takes the smartphone from Si-woo and takes it under the blanket, covering only her face, to check.

    She seemed to be checking the texts she had exchanged with Mom or Aunt the night before.

    As if catching up on the missed progress, Se-hee checks the conversations Si-woo had yesterday while wildly biting Si-woo’s thick penis.

    Then, Se-hee’s body makes a deep sigh and strong trembling.

    Si-woo reaches into the blanket and snatches the smartphone from Se-hee.

    And he checked the texts on the screen where Se-hee was experiencing climax.

    It was the part where she was ordering Mom to be naked all night.

    “Do you like this kind of thing? Do you want to try it too, Sister?”

    “Heeuuht haeuht haaaah”

    Instead of answering, Se-hee continues to make moaning sounds.

    Si-woo returns the smartphone to Se-hee under the blanket – which is barely covering her face.

    While reading the conversation with Mom or Aunt, Se-hee’s lower body repeatedly contracts and overflows with juices.

    Si-woo fully feels Se-hee’s changes and falls into a leisurely dawn nap.

    **

    “Si-woo, wake up~ We need to get up now if we want to shower.”

    Se-hee, lying under Si-woo with his genitals still inside her.

    Si-woo wakes up with a refreshed feeling at Se-hee’s slightly tired and languid voice.

    The soft and warm skin of Se-hee is felt freshly all over Si-woo’s body, as if sticking to him.

    Looking at the wall clock, there wasn’t enough time for the two of them to shower separately and go out.

    -Swish swish thwack!

    As soon as he wakes up, Si-woo strongly thrusts his hips back and forth a couple of times as if to confirm the feeling and soundness of his member inside Se-hee’s body.

    “Haaaah~ Hwak haaaht”

    Se-hee’s body, which had become sensitive, was writhing, not knowing what to do.

    “We can shower together, so let’s stay like this a little longer.”

    The blanket has been pulled down from her face.

    Si-woo repeats the act of moving his hips and stopping, watching Se-hee’s expression and reaction as if he’s playing with her.

    Se-hee, lying under Si-woo, couldn’t resist for a while as if she had become accustomed to the repetitive pleasure Si-woo was creating.

    “Shall we slowly go down to shower now?”

    Si-woo, who had been teasing Se-hee as if playing with her until the very last minute, looks down at Se-hee’s body and says.

    “Huh?…Uh…heuu…ungh…”

    Se-hee looks up at Si-woo, who is looking down at her, seemingly embarrassed.

    A moan-mixed answer was coming from Se-hee’s mouth.

    Si-woo grabs one of Se-hee’s spread legs and moves it to the side.

    Se-hee is now in a prone position with Si-woo’s member inserted from behind, as Si-woo moves her body.

    Si-woo slowly raises Se-hee’s body.

    The standing doggy style position with him thrusting in from behind.

    Si-woo and Se-hee slowly move their steps toward the shower room.

    Each time they move their steps, Si-woo’s massively erect penis was wildly stirring inside Se-hee’s vagina.

    Se-hee buckled over, bending her waist and neck to the point of nearly collapsing, as she climaxed several times again while descending the stairs.

    Si-woo barely manages to reach the shower room, supporting Se-hee with the penis inserted in her.

    The semen that Si-woo had released and the fluids that Se-hee was creating were mixed together and flowing down Se-hee’s thighs.

    A shower where they meticulously wash each other’s bodies while still inserted, followed by explosive sex as if it were only natural.

    And ejaculation inside.

    **

    Si-woo and Se-hee leave the house together.

    The destination is Se-hee’s school.

    Si-woo is walking, holding hands with Se-hee while checking to make sure there are no people around.

    Se-hee doesn’t shake off or reject Si-woo’s hand even outside.

    Si-woo smiles with satisfaction, quietly looking at Se-hee.

    “But, are you okay, Sister?”

    Si-woo asks Se-hee in a playful tone.

    “About what?”

    Se-hee asks back, looking around as if she is slightly on edge.

    “You kept saying it was flowing when we were at home earlier, right? You were grumbling about it, weren’t you?”

    Si-woo brings his mouth close to Se-hee’s ear and says.

    “That’s…that’s because of you, dummy! And I’m wearing a s… sanitary pad now, so…I’m okay…”

    Se-hee couldn’t meet Si-woo’s eyes and spoke as if she was making an excuse in a subdued voice.

    Because Si-woo had inserted his member into her and showered together this morning, Se-hee hadn’t properly washed away Si-woo’s semen that had been released inside.

    Because Si-woo released semen inside her once again after showering, Se-hee’s vagina and uterus, which were already full, were overflowing with Si-woo’s semen.

    Se-hee had apparently worn a sanitary pad as a temporary measure against the overflowing semen.

    Si-woo becomes playful.

    Si-woo grabs Se-hee’s hand and repeats the act of walking quickly then stopping, and walking quickly then stopping again for no reason.

    “Wh…what are you suddenly doing?!”

    Se-hee says as if she is dissatisfied with Si-woo’s actions.

    “Well, I was thinking it might flow out a little better if I do this~ You’re wearing a sanitary pad anyway. Hehehe.”

    Si-woo says teasingly, laughing pervertedly.

    “Geez~ Why are you suddenly doing something like that?!”

    Se-hee says to Si-woo, squeezing out a small voice as if she is embarrassed.

    “It would be nice if it happened…”

    Si-woo mutters playfully as if talking to himself, looking at Se-hee who is troubled.

    “What?”

    Se-hee asks, seemingly puzzled by Si-woo’s sudden words.

    “Pregnancy! Hehe.”

    Si-woo says with a happy expression, smiling.

    “I’m…I’m going to take the pill today, so how could it happen! Dummy~! Why are you saying things like that? Seriously!”

    Se-hee says, making her already flushed face even redder, like a red traffic light.

    Si-woo finds Se-hee, who is carrying his semen inside her body and feeling shy, to be so lovable.

    Si-woo pushes Se-hee against the wall as is and kisses her.

    Si-woo rubs his erect member against Se-hee’s belly and crotch, mixing his saliva into Se-hee’s mouth.

    He no longer cared about the gazes of those around him.

    Si-woo felt as if Se-hee had now become his partner.

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