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The eagerly anticipated Saturday has finally arrived.
Lately, I've been looking forward to Saturdays more than ever.
First of all, school is off. I can stay home all day.
My father usually works even on Saturdays, or he heads out to the pachinko parlor in the morning.
My mother goes to some kind of neighborhood gathering with the other ladies. She doesn't return until evening.
The real problem is my younger sister, two years below me. Matsuri.
Her schedule is a little irregular and unpredictable every week.
But most of the time, she either goes to club activities or hangs out with friends. She usually leaves the house in the morning.
In contrast to me, he never stays cooped up at home on his days off.
From all this, it follows that once a week, on Saturdays, I have the house to myself.
Even the gods might overlook this blank space.
And what do I do during that time?
Well, what else? I indulge in a grand masturbation session.
Until recently, I thought masturbation meant nothing more than gripping my shaft and vigorously scrubbing the skin. But then, I experienced a tremendous breakthrough.
It's called glans masturbation. I became utterly entranced by the unprecedented pleasure it brought.
To be honest, I didn't even realize the foreskin could be retracted until I was halfway through my second year of high school.
It happened when I first saw an uncensored video online.
I was originally searching for raw footage of female genitalia, but to my surprise, my eyes became fixated on the AV actor's penis.
I was astonished.
This isn't like the AV actors I know! I thought.
I'd always assumed AV actors underwent special training and had special penises.
But that wasn't true.
Anyway, because of that, my masturbation completely changed.
I started peeling off the foreskin with caution, using lotion to gently and thoroughly attack the glans.
In short, I started taking my time and doing it properly.
So I wanted to eliminate any potential interruptions: the sound of footsteps on the stairs, the sound of footsteps outside my room, my mother bursting in suddenly.
I wanted to completely immerse myself in masturbation without any distractions.
And that was possible on Saturdays.
I would abstain from masturbation for an entire week, just for Saturday.
For someone who used to do it twice a day, this is a remarkable achievement I'm accomplishing every week.
It's all for Saturday.
Besides, this masturbation—both during and after—is a bit of a hassle.
I can't exactly sprint downstairs to the bathroom with my dripping cock on full display.
If my family, especially my younger sister, ever saw me like that, my life would be over.
As it is, her gaze toward me is already icy.
My younger sister, Matsuri, has already decided I'm a virgin, socially awkward nerd.
Well, she's not wrong, but lately her attitude has become unbearable.
She clicks her tongue meaninglessly whenever we pass each other. Ignores me. When I try to talk to her, she barely even looks at my face.
Even if she deigns to respond, it's always with monosyllabic grunts like "Huh," "Yeah," "So?" or "And?" Her entire demeanor reeks of irritation.
Of course, she stopped calling me "Brother" and even using my name.
"Hey, you," "You," or "Kid"—it was all terrible. How impudent could she be?
Well, the only saving grace was that she was still cute.
Otherwise, I wouldn't have tolerated her attitude.
Besides, she was secretly borrowing my underwear for her masturbation sessions, so I figured we were even on that front.
In any case, that day, I was lying in my room on the second floor, holding my breath, waiting for the family to leave.
Just imagining what was coming later that day had my already overripe arousal primed for action.
Anticipation and my swelling crotch growing heavier, I focused all my senses on the sounds to track my family's movements.
Father had already gone to work.
Mother was probably just finishing getting ready to leave.
And my younger sister, the biggest concern, had fortunately already left the house.
This was a win. Today's sacred masturbation time was practically guaranteed.
The moment I triumphantly thought that, the front door clattered open, and the careless click of shoes sounded.
...Who's there? Who is it?
Caught off guard by this unexpected development, I instinctively stood up, cracked open the door, and focused on the sounds outside.
"Seriously? That's insane!"
"Yeah, it's true. Heh heh."
My younger sister's voice. And another unfamiliar girl's voice.
Then came my mother's booming voice, echoing through the house.
"Goodbye, dear. I'm heading out, but feel free to stay as long as you like."
"Oh, hello! Thank you for having us."
"Matsuri, be careful when you're using the stove."
"I know, Mom."
I heard these voices... Wait. Wait a minute.
This is ridiculous. "Thank you for having us"? Why now of all times? And why today?
Who does this interloper think she is, barging into this sacred space without so much as a by-your-leave?
Shaking with fury, I quickly assessed the situation. That faint sense of dread I'd felt first thing this morning...
It was her. My younger sister. The root of all this chaos.
Matsuri had brought a friend home.
*****
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