Big Brother's Seed Belongs to Me
“What?”
I asked again, thinking I must have misheard.
“I want to have sex with my real brother.”
I heard her correctly.
An AV or manga kind of development.
But I’m a professional now.
“I see. Does your brother know how you feel?”
“He probably doesn’t. But last time I saw him using me as fap material.”
The childish face using that kind of word felt mismatched.
She must be hot, because she takes off her outer clothes.
Bong-geut

Her breasts, previously hidden by clothes, look different now that they’re exposed.
“Are you a college student?”
“Yes.”
“What about your brother?”
She shakes her head at my question.
“No. He works because of me…”
“You must feel sorry for him.”
“Yes. And I like him too much. I love him. I want to make him mine.”
“People around you wouldn’t look kindly on that, would they?”
She makes a sullen face at my words.
“My brother… is really an amazing person.”
Suddenly she’s bragging about her brother?
So I had to listen to her brag about her brother for a while.
“You fell for that gentle side of his, didn’t you?”
“Yes… I can’t even imagine him with another woman.”
This wasn’t just severe brocon. It felt like she couldn’t forgive any lover for her brother except herself.
Her obsession is strong.
“Have you ever tried to seduce him?”
“No…”
“Then you’ve just masturbated while thinking about him?”
“Every day. And he secretly jerks off while calling my name too.”
…
Yeah, that’s impressive.
“At this point, there’s only one thing the patient needs.”
“What is it?”
“Courage.”
“…”
“You’re afraid that if you speak up, even the close sibling relationship you have now might break, right?”
Nod.
“Don’t worry. From what I’ve heard, your brother truly loves you. And he sees you as a woman.”
“I’ve had that feeling too, but…”
“Gather your courage. Cross the line first.”
“What should I do?”
I check my phone.
There’s a perfect incest video.
“Yes. Make sure to watch video XXX-1XX. There’s a woman in a similar situation to yours. She succeeded in the end. She ended up with her brother.”
“Thank you.”
Fulfill Kim Eunseo’s lust in the Room of Lust
A dark house hallway.
Creak creak
‘Haaang♡ Oppa♡ Oppa!!♡’
A woman’s moans echo down the hallway.
It’s Kim Eunseo.
I am her real brother, Kim Eunwu.
Light leaks through the slightly open door.
The only bright spot in the dark hallway.
As I approach, the voices become clearer and louder than before.
“Oppa!!♡ Eunwu oppa♡♡ Haaang♡♡”
Through the gap in the door, I see my little sister Eunseo frantically rubbing her pussy while calling my name.
She’s pinching her own nipples, heading toward climax.

Without realizing it, I pull down my pants and take out my cock.
Throb throb
A huge cock fills my hand.
Gulp
I swallow dryly and watch her masturbate.
“Oppa♡ I like it so much♡”
Her moans excite me too, and I stroke my cock up and down.
“Huuung♡ Good♡ Oppa♡ Oppa!!♡♡ Go! I’m going!!♡♡”
Pshiiiiit
Drip~~! Gush gush~
Along with her orgasm, I ejaculate too.
Phew… Good thing I caught it all in my hand.
Now, pull my pants back up…
Creak
“Huk!”
Thud!
I lose my balance while putting on my pants and fall over.
And then…
My eyes meet Eunseo’s, who has just finished masturbating on the bed and is still feeling the afterglow of her orgasm.
!!
“O-Oppa? Kyaaak!!”
“S-Sorry!! I-I’m really sorry, Eunseo.”
She looks at my half-lowered pants,
and the semen on my hand.
She seems to realize exactly what I was doing.
“Oppa…♡”
I look up at her call.
She’s beautiful.
The sight of her spreading her legs and looking at me with an embarrassed expression is too beautiful.
Beautiful enough that I want to hold her right now.
Beautiful enough that I want to put my cock inside my sister’s pussy.
Especially those bright red flower buds glistening with transparent love juice—I can’t take my eyes off them.

Twitch twitch
My cock, which I just came with, recovers instantly at that beautiful sight.
“Oppa♡ I’m embarrassed♡ Hug me.”
Crack—
In that moment, the thread of reason snaps.
I run over and hug her tightly.
“Haang♡ Oppa…♡”
“Eunseo! I love you♡ I love you, Eunseo!!♡”
“Me too! I love you too, Oppa! I love you, Eunwu oppa!!♡”
We clung to each other, saying we loved each other.
As if our bodies would break.
Everything I had been holding back finally crumbled in front of her.
Chuuuup chuuuup chu chu
A kiss exploring each other’s tongues.
Tongues tangle, saliva exchanges.
Neither of us pulls away first.
When I gently hold her head and pull her toward me, she grabs my body and clings to me as well.
Chuuuup chu chu chuuuup
For what feels like an eternity, I devour her tongue.
Tickling,
tormenting,
teasing,
sucking like I’m drinking from her genitals…
“Puhah!!”
Eunseo pulls her lips away first, out of breath.
She’s not used to it yet and doesn’t know she can breathe through her nose.
That’s adorable too.
Every single thing about her is so lovely it drives me crazy.
Clear eyes,
straight nose,
cherry lips,
perky breasts,
slender waist,
plump hips,
and that thick pussy still dripping with love juice.
Twitch twitch
Looking at her, my cock swells like it’s about to burst.
It’s much bigger than when I usually masturbate.
Veins are bulging so aggressively it doesn’t even feel like my own cock.
“Oppa. It looks painful there.”
“It’s because of you.”
She looks at my cock and brings her face closer.
“If it’s because of me… then I should take care of it, right? Ha-eup♡”

She opens her small mouth and takes the tip of my glans.
The same mouth that used to call for me since we were little is now sucking my cock.
Churururup chuup chup chup
Lick lick
“Ugh. Eunseo. That’s sensitive…”
At my reaction, she gets even more excited and sucks harder.
Chuuuup~ chuuuup!!
She seems determined to focus only on the glans, licking the urethral opening with her tongue and sucking like she’s nursing from a bottle, demanding I give her my semen quickly.
“Haa! I-I think I’m gonna cum!!”
Still, she doesn’t stop the blowjob.
Instead, she sucks even harder.
Churururup chuuuup!! Chup chuuuup chup chup chuuuup!!♡
“Ugh! Cumming!!”
Byurut byurut byururururururururururut gush byurururururururururut~~!!
I ejaculated like crazy.
Gush gush
Gulp gulp
Every time I came, she swallowed it all.
Gulp
“Aah~~”
And when I finished, she proudly opened her mouth to show she had swallowed every drop.
“Oppa’s semen♡ Tastes good♡”
Twitch
At her lovely words, my cock gets hard again.
She looks at my cock with surprised eyes.
“Oppa… you’ve been holding a lot in, huh?”
“Yeah. I was only thinking about you while masturbating, but now that it’s real…”
“I love you, Oppa!!♡♡”
She must have found my appearance lovely, because she hugs me right away.
Her plump breasts rub against my face, and naturally I end up sucking on her nipple.
“Haaang♡ Oppa♡”
Chuuuup! Chup chup
I grab her breast and suck on the nipple.
Like revenge for earlier.
“Huuung♡ Oppa, that feels good♡ Haak!!”
When I bite her nipple lightly, she cries out in pain.
“Are you okay? Did it hurt? Sorry.”
At my apology, she hugs me again and brings her breast to my mouth.
“No♡ It feels too good♡ Suck more♡ Bite Eunseo’s nipple harder, Oppa♡♡”
Chuuuup chuuuup chup chup chuuuup
The more I suck, the harder the bud inside swells and hardens.
Crunch!
“Huuueeeng♡ It hurt♡♡ But it felt good♡♡♡”
Drip drip
Love juice flows from her pussy as if she’s feeling it through her nipple.
At the sight, my cock feels like it’s about to burst again.
“Eunseo…”
“Yes♡ Oppa♡”
“I want to cum inside your pussy♡”
At my words, she looks at my cock again.
“You want to put Oppa’s cock… inside Eunseo’s pussy?”
“Yeah.”
“I’m ovulating today…”
While saying that, she opens a drawer.
Inside are boxes of condoms.
She’s well prepared.
“I’ll let you use my raw pussy next time. Please use this today, Oppa.”
At that embarrassed look, I can’t hold back anymore.
I tear open a condom wrapper and put it on my cock.
It slides on easily since I’m already fully erect.
“Is it okay if I get on top of Oppa?”
She suggests a position she must have wanted to try.
“Doesn’t matter. As long as I can put it in Eunseo’s pussy…”
“Oppa… you pervert.”
“You too.”
We looked at each other and laughed.
And when I lie down on the bed, she climbs on top right away.
Creak creak
Holding my cock, she rubs it against her already soaked pussy.
“Uut! The feeling…”
“Finally with Oppa…”
Thrust!
Plop!
Crack!!
“Haaaaang!!♡ It’s in…♡”

I felt her hymen catch on my cock, but only for a moment.
She sits down hard, and the weight tears it easily.
“Huuuung♡ Oppa’s cock is getting bigger inside♡
Virgin blood mixes with love juice and flows from where our cock and pussy are joined, but she doesn’t seem to feel any pain.
Instead, she seems to be feeling even stronger pleasure from the excitement, just sitting there with my cock inside her.
“Oppa♡ Should I move now?”
Plop… plop… plop~~ plop
She puts strength into her thighs and moves up and down like doing squats.
The sensation on my cock is a bit disappointing because of the condom, but it still feels amazing.
“Haaaaang♡♡ Eunwu oppa’s cock!!!♡ So good!!!♡♡”
“Ugh!! Eunseo’s pussy feels good too!♡”
“Oppa!! Does my pussy taste good? Huueeng♡”
“Yeah! It tastes fucking amazing! So sweet!!♡”
At my reaction, she moves even more wildly up and down.
It’s clearly her first time, yet nothing feels awkward.
How many times did she watch the video I recommended and practice?
Unlike the kissing and blowjob, her cowgirl hip movements are no joke.
Or maybe she was just born a natural slut…
Every time my cock disappears into her pussy, it pierces deep inside and comes out again.
Like exploring a small cave, coming back, then going in again to knock on the hidden baby room with the glans…
It feels like doing pull-ups.
Plop… plop… plop~~ plop~~ plop~~ plop.
“O-Oppa, I think Eunseo’s gonna cum♡”
“Me too, ugh! I’m gonna cum!”
“Cum inside Eunseo’s pussy!!♡”
“Yeah, I’m cumming! I’m cumming my semen inside Eunseo’s pussy!!”
Byurut byurut byururururururururururut~~!!
“Haaaaang♡”
Pshiiiiit
Along with my ejaculation, she also reaches orgasm, squirting pussy juice.
Thud
“Haak♡ Heuung♡”
She collapses onto my body with dazed eyes, breathing heavily.
Chuuuup pop
Drip drip
When I pull out my cock, her love juice flows out.
Looking at the semen in the condom, I really came a lot.
I tie the condom and toss it aside.
In the meantime, she comes to her senses, ties the condom I threw to her garter belt, and looks at me.
“Oppa♡ That’s one shot down?”
With those frightening words, she takes out a new condom.
Rip
She tears open the wrapper, puts it in her mouth, lies down, and approaches me.
At that sight, my cock gets hard again.
She smiles at my cock and puts it in her mouth.
“Huk! What the—!”
I moan involuntarily at the sensation of the condom wrapping around my sensitive cock.
When my cock comes out of her mouth again, it’s already wrapped in the condom.
She learned this technique just from watching videos…
She might be a genius.
“Now, Oppa♡ Put it in Eunseo’s pussy again.”
Then she climbs on top of me again.
Creak creak
Deja vu?
Like before, she rubs my cock against her pussy.
And then,
Plop!
“Haaaaang♡ Oppa’s cock is inside me again!!♡”
“Huk! So tight!!”
Her pussy feels even tighter than before as it swallows my cock.
Then she leans her body forward to hug me and moves only her hips, shaking her ass.
Thud thud! Plop plop plop thud
“Oppa♡ I love your cock!!♡”
“Eunseo’s pussy feels fucking amazing too!!♡”
Chuuuup chuuuup
While kissing, I grab her ass and move my hips together with her.
Thud thud
Squelch squelch
Thrust thrust
“Uuuuup!!♡♡♡”
Ugh!
Suddenly she seems to climax, squeezing her pussy while still kissing.
Because of that, I feel the urge to cum right away.
“Puhah! E-Eunseo! I’m cumming again!!”
“Haaaaang♡ Cum!! Fill Eunseo’s pussy!!♡♡”
Gush~! Byururururut byurut byurururururururururut~~~byurut~~~!!
Pshiiiiit!!!
Along with my ejaculation, she also squirts love juice.
“Haa, haa, haa…”
“Huu… huu.”
Only our ragged breathing echoes in the room.
“Ah… I’m not done yet! Oppa’s cock is mine!!”
“Ugh! Eunseo. Let’s rest a bit…”
“No!”
She takes off the condom again, ties it to her garter belt,
then forces my cock hard with a blowjob and puts on a new condom.
“Oppa… you’re mine forever♡”
At her devilish smile, I black out for a moment.
When I open my eyes again, she’s still in cowgirl position, swallowing my cock with her pussy.
And…
Multiple condoms hanging from her body.
“Haaang♡ Oppa, I love your raw cock♡♡♡”
??
There’s no condom on my cock.
She has completely crossed the line.
She took my advice to cross the line during counseling literally.
“I love Eunseo’s raw pussy too. So tight!”
“Huuueeeeng♡ Oppa! Cum your semen in Eunseo’s womb!!♡
“You’re ovulating.”
“I don’t care!!♡ I want Oppa’s sperm!!♡ Get Eunseo pregnant with Oppa’s baby!!♡♡♡”
‘Get me pregnant.’
Those words are what did it.
“Uwaaah!! Cumming!!!!”
Gush gush. Byurut byurururut byururururururururururut~~!!

It’s amazing that this much semen comes out even after already cumming so many times.
“Oooook♡ Oppa’s baby seed is entering my womb!!♡♡♡ Eunseo is getting pregnant!!♡♡”
Pshiiiiit
She reaches orgasm again too.
Thud
She collapses onto my chest again and falls asleep, still savoring the afterglow.
I also fall asleep while stroking her lovely hair.
Experience points increased. (20/100) Lv.2
1p acquired. (5/10)
Please visit again, Operator.
…
It feels like I’ve been squeezed dry.
Is this what they call taboo?
I never knew forbidden sex would feel like this.
Of course, this is all what the patient wanted.
Beep
“Ah!”
At the alarm I set, I remember what I have to do now.
“Time to check the hospital rooms.”