Squelch, squelch, squelch.
Miki's slick hands worked my cock with lewd, wet sounds.
The intensity of her movements exceeded my wildest imagination, and I couldn't hide my shock. The pleasure coursing through my body left me gasping for breath.
This is serious. This was Miki-chan's true intent. In that instant, I realized that everything before had just been teasing.
Squelch, squelch, squelch, squelch...
Her pale hands moved with a single purpose: to squeeze every last drop of semen from me. Their strokes shifted from covering my entire shaft to relentlessly grinding against the glans neck and the base of the glans.
Miki didn't hold back this time, determined to make me climax as quickly as possible.
She was targeting my weakest spot.
This feels too good...
There's no way I'll last three minutes with this.
Why did I even think I could last three minutes? Not even thirty seconds.
While I was still thinking that, Oh, shit, I'm gonna... Wait, no, no... Huh? No way... Huh? Huh...?
Just as I was about to come too soon, Miki suddenly stopped.
What's wrong? I wondered, gritting my teeth and trying to hold back.
"Hey, wait... Wh-what are you doing...?"
I turned toward the voice. Matsuri had finished washing her hands and returned to the room, now standing frozen, staring in disbelief.
Miki waved her left hand, which she'd been holding on my knee, at Matsuri.
"Ah, Matsuri-chan's here! Look, look—I'm doing it really well, right?"
With that, she resumed her movements.
Squelch, squelch, squelch, squelch...
This handjob was on a completely different level compared to Matsuri's. Matsuri watched the movement of Miki's hand, swallowing hard.
This wasn't just about skill; even Matsuri seemed a little taken aback, though I wondered if she was okay with this.
"I wonder if this will actually make you come... Matsuri-chan, watch closely, okay?"
Miki tilted her head dramatically.
Don't worry, it's coming. In fact, it's already coming.
Realizing I'd never last three minutes under this onslaught, I abandoned all restraint and let myself come.
Duk, duk, duk...
The surging semen, bringing waves of pleasure, spilled over the glans.
Well, when you've been nervously fiddling with your freshly exposed penis and suddenly get a soul-pouring, all-out, sloppy handjob, even your balls are startled into promptly releasing their load.
But after five in a row, the volume was starting to taper off.
Has all a week's worth of semen finally been emptied? I'd never experienced such a relentless barrage before.
As the orgasm subsided, I began to regain some clarity.
Matsuri's gaze was painfully intense. She was staring so intently it felt like she'd never look away.
Well, I lost. I lost. So much for graduating from virginity with Miki-chan. It was just a pipe dream after all.
I'll probably get teased: "Hurry up! You didn't stand a chance!"
Squelch, squelch, squelch...
But then I noticed something strange.
Or rather, I realized nothing had changed.
Miki's hand showed no sign of stopping. In fact, her grip tightened, and she continued stroking relentlessly.
"We still have time left, right? Just over two minutes... You won't lose, will you?" Miki remarked, glancing at her watch.
Huh? She didn't notice I came?
My penis was covered in a sticky, white substance—whether it was dried pre-cum or something else, I couldn't tell. A small amount of semen might have gone unnoticed.
Besides, Miki seemed more focused on Matsuri's reactions than my penis. Even as her hand vigorously worked me, her eyes were fixed on Matsuri.
I wanted to ask, "What the hell is going on here?" But maybe if I just stay quiet, this could work?
If I could get through this without being caught, I'd have won... My victory would be at hand.
This is it. The moment of my complete defloration. Matsuri returning just now... I'm so lucky.
But my momentary euphoria was cut short.
Squelch, squelch, squelch, squelch...
"Ah! Aah?!"
I let out a high-pitched scream despite myself.
A sudden, unfamiliar sensation assailed me—a strange, indescribable tickle mixed with a painful pleasure.
Is this what it feels like when someone strokes an already hypersensitive glans after orgasm?
"Ah! Aaaaah!"
More involuntary cries escaped me as my hips began to jerk uncontrollably.
Instinctively, I tried to push Miki's hand away, but my arms lacked the strength to obey.
Unaware of my distress, Miki rubbed my penis even more relentlessly than before.
This is bad, this is really bad! What the hell is this?! I don't know what's happening, but this is seriously bad!
Am I going to die? If this keeps up, I'm going to die!
"Ah! Aaaaah! I'm... I'm gonna come again! I'm coming..."
I admitted defeat myself. There was no time to worry about keeping quiet anymore.
Continuing like this is dangerous. I feel like my penis—no, my mind—will break before I can even get inside Miki.
It's that bad. In every sense of the word.
But Miki seems to misunderstand my reaction, and her movements become even more frenzied.
"Come on, come on! Matsuri-chan is watching! You're making such pathetic noises even though your younger sister is seeing everything. Are you just going to keep going like this? Are you going to come?"
"Ah, no, that's not... Ah, aahh!"
She doesn't notice.
As this goes on, the overwhelming sensations in my penis reach a new level.
Something prickles at the tip. Has the glans finally gone numb from being rubbed too much?
"Ah, ah, w-wait... S-stop..."
"Forty seconds left... I have to push for the win too."
This is serious. If this continues, my penis will die.
I'm desperately trying to hold back, pretending I'm about to climax.
How can I make her notice? ...Right, I just need to come again.
If I really let loose this time, she'll definitely notice.
Shivering violently, I focus all my awareness on the rising sensation.
Then it comes, sudden and overwhelming—the most intense climax I've ever experienced.
If this explodes, Miki will have to notice. This is definitely a Big Bang-class ejaculation.
Squelch, squelch, squelch, squelch!
As if to stop me, Miki's final surge begins.
But now, something feels different from my usual climax.
This isn't just coming... It feels more like I'm about to pee.
I don't know what's happening, but... is this something dangerous if I let it out?
But I was so determined to climax until the very last moment that I can't stop now. In fact, I can't bear the stimulation any longer.
"Ah, ah, ah, ah, I'm... I'm coming!"
Fshhh, fshuuu!
At that moment, a powerful jet of liquid erupted from the glans, swollen crimson to its limit.
This wasn't a gentle dok-dok. It was more like a fshaaaaa!—a fountain-like spray.
My entire body convulsed violently, gakun-gakun, as an overwhelming wave of pleasure washed over me, blanking my mind.
"Kyaaah?!"
Miki squeezed her eyes shut and arched her back.
The splattered droplets landed on me before dripping wetly onto the floor.
"W-what was that?! Why did you do that?!"
"I... I don't know," I mumbled hazily.
This definitely wasn't semen. No, if it were semen, spraying it like this would mean I'm no longer human.
Something else came out. I don't know what it was, but it felt like something I shouldn't have released.
Miki spent a while sniffing the liquid on her hand, then eventually held out her wet palm toward Matsuri.
"What do you think about this, Matsuri-chan?"
"W-What do you mean...?" Matsuri stammered, her eyes wide with shock.
Her reaction was entirely understandable. After all, she'd just witnessed her brother scream and shoot his load right in front of her.
"T-That's... that's not weird...?"
"Yeah, it's pretty weird, huh? I was startled too."
At this point, all I could do was agree. Everything's just messed up.
What was I supposed to do with this awkward atmosphere? Both of them were staring at me like I was some kind of rare beast.
"Anyway, Miki, hurry up and wash your hand! It's fine now, right? Let's just ignore him—he's messed up—and take the laptop. C'mon!"
Matsuri tiptoed across the wet floor, snatched the laptop from the desk, and fled the room in a hurry.
The whole time, neither of them even glanced my way.
Miki, who had been watching, spoke up.
"Hmm, maybe I was a bit too intense for Matsuri-chan all at once. We should probably take things slower... Anyway, it seems it's no good for today."
She prodded my completely flaccid penis.
My breathing was shallow and labored, leaving me unable to form a coherent response.
"By the way, I won, right? About twenty seconds left? Too bad, big brother. Now, as promised, you'll do exactly as I say from now on, okay?"
"...Huh? W-wait, no, I thought we agreed to cooperate."
"Cooperate means doing exactly as I say, doesn't it?"
"B-but..."
"You're the one who said we were going all out, right? You're the one who came undone. I took the risk of getting penetrated and being filled with your mess!"
Her logic was flawless, leaving me utterly speechless.
Having to obey a younger girl... What a reward... No, what a humiliation.
If she were like my younger sister, that sassy little brat, it would be a different story. But with Miki-chan, it might not be so bad.
"So, you really need to obey Matsuri-chan properly."
"Huh? What? Why Matsuri...?"
"It's my order to listen to what Matsuri-chan says. I just want you two to become closer."
"Close" or just a plain master-servant relationship? Why am I the one on the bottom?
I see, so that's the no-nonsense approach.
Wait a minute, this isn't cooperation. You just issued a command!
This is hopeless. If we go along with this, anything could happen.
As I was about to protest, Miki whispered in my ear, as if to stop me.
"We'll be back next week. Until then, no masturbation. Save it all up for me, okay?"
What the...? So next week, we'll be doing... all that again? For real?
If I resist clumsily here, I might upset her and lose everything.
If I can have this kind of delicious experience again next week, I'll have to be as obedient as a dog.
My pride was utterly shattered by my sexual desire.
No, wait... If people could get this kind of service, they'd definitely obey, even if it meant just listening to a few requests.
Putting aside the fact that I'm a masochist... Seriously.
I nodded vigorously, like a dog wagging its tail.
Then Miki lightly tapped my head, chuckled contentedly, and left my room after Matsuri.
...Ahh, Miki-chan is so cute, so erotic. She's the best.
Ugh, I have to keep going. For the next week, I'll try abstinence again.
As I savored the lingering afterglow of Miki's climax, a scream came from the next room.
...Oh. The computer is covered in lotion.