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for Advance Chapter
～AM 8:48～
"…Instead of staring at your phone all the time, please look at Kaju."
"I am looking. Kaju is cute."
"Yes, Kaju polishes her cuteness every day for big brother♡"
"I'm glad… Ah, I'll wash the dishes later, so just stack them."
"Yes, kind big brother♡… But if possible, Kaju wants you to rely on her more."
"…Are you aiming for a reward?"
"Yes♡"
"…"
After finishing the meal, just when I thought things had calmed down, Kaju becomes proactive again.
We are still both completely naked. Kaju prepared breakfast while naked, I ate it while naked, and now I'm drinking café au lait after the meal, listening to the news as background music on the TV while scrolling through my timeline on my phone.
This insane situation of spending the whole day naked — even though I try to spend it peacefully, Kaju keeps looking for opportunities.
"You've woken up, eaten, and your cock should have calmed down by now♡"
"No… Not yet, I think."
"You're half-hard."
"…It's the air from the air conditioner."
"I see. So the faint breeze from the air conditioner feels better than the charm of Kaju's naked body… Understood."
"Hey, hey Kaju… Isn't it unfair to look so disappointed?"
I can hold back the approaching little sister, but I cannot ignore a depressed Kaju. As her older brother, that is impossible. "If pushing doesn't work, try pulling" is a well-known saying, and she's using it craftily.
"…Sniff."
"U-Ugh, fake crying… I won't be fooled."
…Pat pat.
"Yes, big brother is not fooled. As expected, Kaju is impressed by your sharp eyes."
"You're not wearing a hat to take off — you're not wearing any clothes at all."
"I'm getting used to it. Spending time completely naked might not be as stimulating as I thought."
"Yeah. Humans are creatures that adapt, so we surpassed other animals with our ability to adapt… We are learning that lesson with our own bodies."
"Big brother, now that you've learned it, you're not suggesting we end it and put on clothes… are you?"
"…Kaju, big brother likes Kaju's naked body. But I like Kaju wearing clothes even more."
"Waa, big brother praised me♪ I feel like I'm being deceived, but I'll let it slide♪"
She happily bounces a little.
In front of me sitting on the sofa, Kaju spins in place. Her long black hair spreads out with centrifugal force, revealing everything, and—
"…————!!♡♡"
"Kaju… Don't show off like that… It's really tormenting."
Whenever there is an opening, she does exposure play.
Saying I'm used to it is just bravado.
"Big brother, I want you to be more honest♡… Kaju loves your embarrassing true feelings even more than your kind lies♡"
Pretending to be innocent while acting lewd, she poses seductively on the spot and offers her words.
"Kaju…"
We left the room, came to the living room, ate, and relaxed. Throughout all this time, Kaju has been in a good mood.
Ever since she took off the babydoll in the room and came to the living room, Kaju has looked happy.
Part of it is her enjoyment in teasing me as I feel embarrassed and flustered. But right now, Kaju also looks relieved.
That must mean she had been holding back for a very long time.
"Hey Kaju, is being naked fun?"
"Yes! Very much♡"
She nodded energetically.
Right now, Kaju really has no stress. She looks so light she might float away.
All of this is because I yielded to her pressure and allowed the oral service.
Even if it was only with her mouth, we have crossed the final line.
And now we are spending time completely naked together. There is nothing to hide, nothing to suppress, nothing bothersome.
There are almost no easier conditions to cross the hurdle.
"…"
"Big brother, your gaze has been on me the whole time… Aah, Kaju is so happy. Please look at me more, more♡"
She patters around the living room with her bare feet as if dancing lightly.
Even after liberating herself, her desires show no sign of running out. Kaju is still overflowing with wants.
"Big brother is naked♡ Kaju is naked♡… Kusu, n fufu♡ It feels like we're doing something bad, and it's somehow fun♡"
"Yeah, it certainly is something bad… From the perspective of decency."
It might be called vulgar.
In reality, I don't want to put my bare ass or cock on the sofa, so I keep standing. Even if I, as a man, spend the day naked, there's nothing visually pleasing about it.
But in Kaju's case, it's different.
…I can't take my eyes off her.
With her waist-length long black hair flowing, she looks like a fairy of skin color dancing — I even feel a fantastical impression.
She is adorable, and yet the sensuality comes from not hiding her genitals.
"Kaju… Please, don't awaken any weird habits because of this."
"Exposure play? It's fine. Kaju won't do it unless big brother wants it."
"Don't do it… Or rather, I won't let you."
I don't have that kind of hobby. But honestly, it's dangerous.
It's not only Kaju who has become bold.
I was asked by Kaju and reluctantly stayed passive. Right now, I can still stand in that position.
But beyond this point, I don't know what will happen.
I am currently tasting how bad it is to have started feeling sexual charm from my cute little sister.
Seeing Kaju completely exposed and liberated, all I can think of are black, immoral acts.
There is hesitation and guilt. But no matter how roughly I imagine treating her, I cannot picture Kaju hating it.