Want to Try a Cleanup Blowjob Too?
Damn. I'm screwed.
My mind went completely blank.
Was there any situation worse than this?
Just moments ago, Subin and I had been wrapped in such a tender atmosphere, right on the verge of a confession.
And now she'd walked in on me getting a blowjob from my twin sister—right there in her living room.
My heart felt like it had plummeted straight through the floor.
I was certain Subin would explode in rage, or stare at me with pure contempt and scream at me to get the hell out.
No—crying seemed even more likely.
After all, she'd just been betrayed this horribly, in her own home, by the guy she'd only just thanked for becoming her friend.
But.
"Ah…"
Contrary to every expectation, Subin's reaction was surprisingly calm.
She was startled, of course, but nowhere near the stunned or devastated look I'd imagined.
Her eyes went wide for a moment; then she seemed to grasp the situation and smiled faintly.
"You were in the middle of sexual processing?"
Subin said it so casually that it almost sounded ordinary, then sat down at the table as if nothing were amiss.
"…Huh?"
Now it was my turn to be flustered.
"Oh—if the sexual processing makes things awkward, should I step out for a bit?"
She actually asked out of consideration for me.
I shook my head awkwardly. Having the homeowner leave just so someone could finish getting a blowjob felt even weirder.
"No, it's fine…"
Honestly, it wasn't fine at all.
The thought of Subin sitting right beside us, watching Chaerin and me perform this filthy act, made my face burn with shame.
Chaerin paused for only a heartbeat, then went right back to taking my cock into her mouth and working her tongue like nothing had changed.
That was when another piece of this world's common sense finally clicked into place for me.
If a man needed sexual processing, it had to be done immediately—anytime, anywhere.
It was as natural as a wife cooking dinner for her husband.
To Subin, the scene in front of her was a little hard to look at, but it wasn't some catastrophic crisis.
It was simply the perfectly ordinary sight of a man who urgently needed relief, and of Chaerin fulfilling that duty.
There was almost no jealousy in Subin's expression.
Just the faintest flicker of envy as her eyes drifted over Chaerin's head.
Still, she was clearly interested; even while pretending to study the board game, she kept sneaking glances our way.
—Slurp, schlick, slurrrp.
Every time those blatant, wet blowjob sounds spilled from Chaerin's lips, Subin's body gave a tiny jolt. The tips of her ears had turned faintly pink.
The knowledge that someone was watching me get sucked made something inside me start to boil all over again.
Being conscious of Subin's gaze made my body tense up on its own. That tension brought a strange shiver that only amplified the pleasure, and my cock swelled until it felt ready to burst.
Chaerin sensed the change instantly and swallowed me even deeper.
My cock almost reached her throat, yet she didn't pull back. Instead she flicked her tongue against the underside of the head, giving me even stronger stimulation.
It didn't take long before I came deep inside Chaerin's mouth.
—Bluuurgh!
Even after having sex with the school nurse earlier, the volume of semen hadn't decreased at all.
If anything, the perverse thrill of Subin watching made me shoot even more than usual.
"Mmmp… gulp…"
Chaerin took the entire load in her mouth, then shot a quick glance at Subin for some reason—and instead of heading to the bathroom to spit, she simply swallowed everything right there.
As if she were showing off the fact that she'd just given the blowjob.
After that she performed a thorough cleanup blowjob, licking up every last remaining drop before finally letting my cock slip free.
"Haa…"
Service complete, Chaerin let out a satisfied sigh. She wiped her mouth with the back of her hand as if nothing had happened and returned to her seat.
"Alright, shall we finish the board game?"
The problem was me.
Even after shooting once so satisfyingly, my erection hadn't subsided in the slightest.
If anything, the combination of Subin's gaze beside me and the saliva Chaerin had left coating my cock made it swell even harder.
There was no way I could put my pants back on like this.
Standing there half-naked, I stared at Subin and wrestled with myself.
Should I even say it? What if she ends up hating me? Or… maybe Subin wants it too?
If I let this chance slip by, I knew I'd regret it. In the end I couldn't hold back any longer.
"Subin."
"Yeah?"
"Do you… want to try a cleanup blowjob too?"
The moment the words left my mouth, Chaerin's gaze snapped onto me. I felt a faint flicker of jealousy from her, but it wasn't severe.
Subin's face turned as red as a beet. She didn't refuse.
Instead, with an expression that mixed shy joy—almost as if she were grateful I'd offered her the chance—she gave a tiny nod.
"Y-yeah…!"
I stayed right where I was.
Subin came forward without hesitation, as though she'd been waiting a long time for this, and dropped to her knees in front of me.
She shot a quick, cautious glance at Chaerin, then shifted her eyes to my cock and swallowed hard.
In a posture so devout it almost looked like prayer, she gazed up at the thick shaft that still faintly glistened with Chaerin's saliva.
My long, heavy cock cast a shadow across her beautiful face.
The swollen head nearly brushed her neat forehead; the base sat lower than her tightly clenched chin.
Like someone staring up at a massive pillar, Subin's green eyes trembled with awe.
The sight of her entire face swallowed beneath the presence of my single cock made the urge to conquer her impossible to restrain.
At last Subin's cherry-red lips slowly parted and took my glistening cock into her mouth.
"Chuuup…"
Those very lips that had been kissing me only a little while ago were now wrapped around my cock.
That single fact alone made excitement explode through my skull like fireworks.
"Mmmp… lick… huup…"
Of course, since it was her first blowjob and she'd never practiced properly, Subin's technique was far clumsier and more awkward than Chaerin's.
Her teeth scraped now and then, and her tongue movements were stiff.
"It's okay. You're doing amazingly for your first time."
Still, I didn't hold back the praise as I stroked her soft blonde hair.
I'd already figured out that Subin was weak to compliments.
Just as I expected, every word of praise made her light up visibly and try even harder.
Her clumsy tongue work gradually softened; she strove in her own way to make me feel good.
She stopped simply sucking the shaft and instead stuck out her tongue, carefully licking from the head all the way down to the base, meticulously wiping away the saliva Chaerin had left behind.
She probably didn't intend it that way, but it felt like a possessive desire to erase every trace of Chaerin from my cock and claim it as hers alone—and that only made me harder.
For quite a while I simply stood there, surrounded by two beautiful girls, enjoying pure pleasure in someone else's living room.
When the clumsy cleanup blowjob finally ended, I praised her again for doing so well on her first try.
And I made sure to thank Chaerin sincerely for handling the sexual processing.
Her expression eased a little and she replied in classic tsundere fashion, "Well, it's nothing special."
Just like that, the two girls who had taken turns sucking one man's cock moments earlier behaved as if nothing unusual had occurred.
They casually ate the delivered chicken for dinner and went right back to enjoying the board game.
That night, when I got home, my phone kept buzzing nonstop.
It turned out to be a newly created class group chat. Everyone was chatting pretty lively.
When I sent a casual greeting, almost the entire class welcomed me warmly.
In the middle of that, a private message arrived from Subin.
Because Chaerin had interrupted the confession flow, it looked like Subin intended for us to stay just friends for a while.
After finishing the short chat with her, I stared at the mountain of contacts and messages piled up on my phone and found myself wondering once again about the previous "Kim Sihyuk."
Before bed I took some time to start browsing through the traces of his past, little by little.
The conclusion I reached after reading was simple: he had been an extremely ordinary man.
Like any ordinary man of this world, he hadn't been particularly interested in women and had possessed almost no sex drive. Still, he occasionally ate meals with girls or chatted with them and received pocket money and gifts in return—relationships of exactly that level.
Nothing special stood out. What on earth had happened?
While I was lost in thought about Kim Sihyuk, I kept getting distracted by Chaerin's plump, tempting ass as she cleaned the house in dolphin shorts, and my cock kept getting hard at the worst possible moments.
As always, I swallowed a few of the pills from the hospital with water and went to sleep.
Subin's house.
Subin excitedly bragged to her mother—who had just gotten off work from the hospital—about how much fun she'd had playing with Sihyuk that day.
Her mother, Han Danbi, simply replied, "Is that so? Did you have a lot of fun?" and smiled warmly.
But deep in the night, after her daughter had fallen asleep, the atmosphere inside her room changed completely.
Beautiful blonde hair, a young and elegant face that could easily pass for Subin's older sister.
Danbi, dressed in an elegant silk gown, took out a sleek, unmarked laptop.
Fingerprint, iris. After clearing dual biometric security, a cold blue interface bloomed across the screen.
Complex graphs of Kim Sihyuk's vital signs and hormone-level fluctuations filled the display.
Han Danbi scanned the received report with indifferent eyes, then typed a brief note into the confirmation field at the bottom.
Sexual impulse-related hormone responses: active. Prefrontal cortex activity related to aggression control: within stable range. Maintain current drug therapy.
Her eyes were coldly sunken as she pressed the enter key. A dry sigh escaped her lips.
She closed the complex interface and opened a photo of her daughter on the desktop.
The bright smile of Subin—taken with Sihyuk on graduation day not long ago—filled the entire screen.
Her daughter's warm smile. As she gazed at that photo, Danbi's eyes wavered with complicated emotion.
Outside the window, the light in Sihyuk's house across the way went dark.
If it's for Subin's happiness…
She murmured quietly.
"It can't be helped. I did my best."
She turned off the screen and leaned back in her chair.
Beneath her closed eyelids, the face of her happily smiling daughter and the face of a man screaming in agony rose at the same time.