"Ah?!"
Unlike Miki, Matsuri's foot mercilessly crushed my crotch.
The balls, my balls...
"So you want it too, Matsuri-chan. I'm a little tired, so you can take over."
"Huh? Oh..."
Matsuri, who had just thrust her foot down in a burst of momentum after Miki's words, now looked bewildered.
But I couldn't let this slide. Even as her foot remained pressed down, I raised my voice.
"No, Miki-chan, that's not it, so Matsuri—Agh!"
Matsuri seemed to be telling me to shut up, pressing down harder with her foot, grinding it viciously into my crotch.
With both my shaft and balls being crushed together, I couldn't even begin to enjoy it.
Unable to bear it any longer, I tried to sit up and escape, but Miki held me down.
"You can't just run away! Just let her keep stepping on you."
"S-staying stepped on..."
"This is an order. Don't tell me you've forgotten? About losing that bet last week."
A bet? It wasn't like I could just push through and ignore it. The oppressive atmosphere was intense.
Besides, if I went through with it, I'd completely lose Miki's favor.
Forget a reward—I might even lose any future contact with her altogether.
In the end, I relented and returned to my original position. In short, I'd lost to my lust.
Seeing my resistance crumble, Miki turned to Matsuri with sparkling eyes, urging her on.
"Hey, Matsuri-chan, come on, hurry up!"
"Huh? But..."
"What's wrong? Oh, could it be... Matsuri-chan, you've never let your boyfriend step on you before, have you?"
No way, of course not.
What's with that outdated tone?
"Huh? Oh, uh... now that you mention it, I think something like that might have happened once?"
"Wow, that's so amazing! Just like you, Matsuri-chan!"
Wait, what?
Could someone explain what's so amazing about that?
Pleased by the mysterious praise, Matsuri began flexing her leg muscles again.
"Hey, hey, wait a minute! Stop—stop crushing my balls, seriously!"
Who the hell would suddenly try to crush someone's balls like that?
Just how masochistic was this girl's ex-boyfriend?
Well, she probably just made up that story about stepping on his penis anyway... But seriously, what kind of relationship is this where she's mercilessly trying to crush my balls?
"M-My, you're so noisy. Don't startle me like that."
Startled by my genuine scream, Matsuri momentarily lifted her foot.
Then, cautiously avoiding my balls this time, she slowly extended her leg toward my shaft again.
This stubborn refusal to back down lately is what's really weird about her.
Gently, gently, gently...
With sock-clad fingertips, Matsuri tentatively, almost fearfully, began to stroke the glans.
Today, Matsuri was wearing a thin, fluttering blouse, a relatively short skirt, and black knee socks.
Since she's gone out, she's dressed quite neatly.
So when she raises her leg, the angle is just right to make you think you might see under her skirt, though you don't quite—quite a suggestive position.
I absolutely love foot fetishism and the absolute area... but it's Matsuri. If it were Miki-chan, I wouldn't have a single complaint.
Still, even though she's my younger sister, she's really getting into this.
"Ugh... what is this? It's so sticky and... hard..."
Eventually, Matsuri, ignoring the fact that her socks are getting dirty, presses my penis down onto my stomach and steps on it.
"You were enjoying getting stepped on? You're such a pervert," she mutters, yet her lips twist into a pleased smirk.
At first, she seemed a little hesitant, but as she sees the penis twitch and arch beneath her foot, her pressure gradually grows stronger.
Grind, grind, grind...
Oh no, whether it's Miki's or Matsuri's foot, it doesn't matter—I'm actually starting to enjoy this...
"Does this feel good? Something like this? Heh heh heh..."
Oh no, she's flipped another strange switch.
Matsuri, who was utterly disgusted just moments ago, now wears a gleeful expression as she taunts me.
True, relentlessly trampling with her foot is exactly the kind of thing the sadistic Matsuri would do...
Just then, Miki, who had been quietly observing from beside the bed, suddenly collapses beside me with a thud.
Now, the three of us lie side by side on the bed.
Matsuri looks down at Miki with a slightly exasperated expression.
"What are you doing, Miki...?"
"Don't worry about me, just keep going. I'm just a little tired and resting."
Don't worry about me? How could I not worry? Miki lies beside me, her sweet scent drifting through the air as she subtly shifts closer.
As we rapidly approached, I felt flustered. Then Miki whispered softly into my ear:
"Haaan, this angle is unbearable... I want Matsuri-chan to step on me too..."
Huh? What a pervert!
I couldn't help but stare at her in surprise. Miki, looking excited, continued whispering:
"S-so, how does Matsuri-chan's foot feel? Does it feel good?"
"Uh, well, yeah..."
"Haa... So lucky, so lucky..."
Miki's warm breath brushed against my ear as she shifted restlessly.
It was strange enough on its own, but having her whisper so intimately, her breath caressing my ear, sent shivers down my spine.
"Hey, what's with that goofy grin?"
Suddenly, Matsuri's foot pressed down harder.
Did she think Miki and I were getting all lovey-dovey?
Though, to be fair, we hadn't done anything to warrant her getting upset...
"Seriously, getting off on getting stepped on like this? Aren't you just a pervert? Aren't you embarrassed? Huh?"
Matsuri suddenly raised her voice, her tone scornful. Something had clearly annoyed her, and her irritation was palpable.
When I thought about it calmly, I realized that getting turned on by my younger sister stepping on my penis was undeniably humiliating.
"Koko, you can't possibly... you wouldn't actually come from getting stepped on, would you?"
Matsuri turned to me with a superior look and snorted.
I was already aroused and close to the edge, but coming from my sister's foot pressure would be too pathetic.
Matsuri seemed to have grown accustomed to it, now rhythmically grinding her foot between my shaft and glans with practiced precision.
Her pressure had increased by about 40%.
Having already been teased once by Miki and hovering near my limit, my cock felt like it was about to explode at any moment.
But then, my mind screeched to a halt.
Being cursed at, ridiculed, and stepped on by my younger sister as I pathetically ejaculated. And then being branded, in both name and deed, as a true hentai.
If it were Miki-chan, that might be one thing. But it's Matsuri! My younger sister! No, that's just...
Are you really okay with this? Is that how you want to live your life?
The moment that thought crossed my mind, the wave of climax abruptly receded.
Apparently, mental factors can have a surprisingly strong impact.
But as I began to regain my composure, a devilish whisper reached my ear from beside me:
"Huh? What's wrong? You were about to come, weren't you? You can let go completely! C'mon, c'mon, come, come! And then cover Matsuri-chan's legs all over with it! Right?"
Miki leaned in close, whispering in my ear.
Her sweet voice, soft enough to melt my brain, sent my heart racing faster and faster.
"Come on, hurry up! Show me how you're gonna spill all that semen? You've been holding it in, haven't you? If you try to hold back, your little penis might get hurt. C'mon, let it out? Make it go pjuupjuu? Semen pjuupjuu!"
Her whispered words felt like a direct stimulation to my brain, completely disrupting my thoughts and sending a direct signal to my scrotum to ejaculate.
Watching us, Matsuri seemed even more displeased, pressing her foot down on my penis with even more force.
The black-clad foot moved roughly up and down my shaft, dragging it roughly back and forth.
Brain and cock. Overwhelmed by the dual stimulation, my mind went blank, and my body was helplessly thrust into orgasm.
Dop, dop, dop, dop...
The first powerful jet splattered across Matsuri's black socks, leaving them damp and white, before trailing down her abdomen.
Unconcerned about further stains, she continued to press down on her urethra, squeezing out every last drop.
Her throbbing cock, still violently contracting, obediently continued to spew massive amounts of semen for several more moments, as if urged on.