Making Subin Deepthroat
The afterglow of sex with Iseol noona through the glory hole had barely faded when the right-hand door beyond the partition wall opened again.
Who would it be this time?
I sank deep into the chair and waited. The footsteps were careful. She was probably nervous.
The soft rustle of a skirt brushing over the kneeling cushion reached me, followed by a tiny cough and a familiar voice.
"I... I confess."
It turned out the second woman was Chaerin.
Her usual tsundere snippiness was gone; nerves had turned her voice stiff and brittle.
"Last night... I committed the sin of brushing my teeth with my twin brother's toothbrush."
"...What?"
I blurted the question without thinking. That was not the confession I had expected.
People confessed things like that?
"And... I took my twin brother's underwear from the laundry basket and... rubbed it against my... my pussy."
Her voice shrank smaller and smaller. So that was why she had been so tense—she was terrified of saying it to the owner of the panties. I could feel her fear that I might get angry.
The mental image of Chaerin masturbating with my underwear made my lower body throb.
I had never once considered what happened to my underwear after it went into the laundry basket. Chaerin did all the housework, after all.
"That isn't everything."
Chaerin drew a long breath.
"I've... loved him as a man, not as a twin brother, ever since I was very little. I always wanted to become his wife. He accepted me, yet somehow I keep feeling guilty."
The end of her voice trembled thinly. I stayed silent for a moment.
Even after I had accepted her confession and promised marriage, the moment her one-sided love bore fruit, Chaerin seemed to feel only anxiety.
"There's nothing strange about that."
I answered in the gentlest voice I could manage.
"The uneasiness you're feeling right now is completely natural."
"...It is?"
"You've loved me for so long that it still hasn't sunk in."
I stood and walked to the hole in the partition wall.
The same glory hole I had just used with Iseol noona.
"I'll help it sink in."
I dropped my pants and pushed my already rock-hard cock straight through the hole. On the other side I heard Chaerin swallow a sharp breath.
"I'll make sure you never feel anxious again. Treat me however you want."
"...Really? I can?"
Chaerin dropped the formal speech and asked me straight.
"Of course."
A brief silence fell. Then footsteps approached with new resolve.
Beyond the wall Chaerin stopped right in front of my cock.
Chuuup.
Warm, soft lips closed around the head.
Chaerin's blowjob skills had clearly improved.
The clumsiness of her first attempt was gone. The result of academy theory classes and the practice she did at home, no doubt.
Her tongue didn't just trail from tip to root—it had real strength behind it.
And the pressure she used when she licked the head was perfect; it felt wonderful.
Knowing she had trained her technique for me spread a deep psychological satisfaction through my whole body.
"Heup, chyuup, chyuup..."
Squelch, squelch.
Along with the wet sounds of her mouth, a second wet sound came from beyond the wall.
She was clearly fingering her own pussy while she sucked me. The wet noise of her masturbating while she blew me grew louder and louder.
That fact only excited me more.
My twin little sister sucking my cock while she dug her fingers into her soaked pussy. Just imagining it made my head spin with lust.
She was growing into an excellent female—no, an excellent wife.
Once she finished the academy curriculum and took the actual sex classes after the caress training, how much more incredible would Chaerin become?
Anticipation made my cock swell even harder.
Whether because she thought no one else was around or because the wall freed her from having to show her face, Chaerin made far dirtier, lewder sounds than usual while she worked.
Her ragged breathing crossed the partition and reached me.
"Huuup, churrt, eungh...! Every time I lick it with my tongue... I can feel your cock twitching...♡"
Pssht!
Every so often she stopped her diligent tongue and let out a moan. At the same moment I heard the sound of her juices spurting out.
She was climaxing alone, over and over.
Each time, the inside of her mouth grew hotter and the pressure around my cock grew stronger.
Unfortunately, even with Chaerin's passionate service I still couldn't come.
Her blowjob technique still hadn't reached Nari's or Iseol noona's level. Ten minutes passed in no time and the timer rang.
Ah, if she had just been a little better I would have finished.
But thinking of the other college girls waiting their turn, I swallowed the disappointment.
"Th-thank you...!"
Chaerin thanked me in a voice thick with emotion for willingly offering my cock, then hurried out of the room.
I tucked away my still-unsatisfied cock, sat back down, and waited for the next person.
Soon the right-hand door opened again and someone entered. Her footsteps were even more careful than Chaerin's.
"Ah, the floor's wet?"
A shy voice. It was Subin.
The wetness on the floor was probably noona's and Chaerin's juices.
I smiled inwardly at the thought of the two of them leaving without wiping up what they had spilled.
I relaxed a little and waited for Subin to kneel and make her confession. I figured a girl like Subin wouldn't have much to confess.
With her HSDD, her libido was low, so she almost never would have masturbated while thinking of me.
My expectation was thoroughly shattered.
"I... practice deepthroating with a training dildo every single night. But strangely, every time I can't breathe and it hurts, I think of Sihyuk... and I end up touching my pussy."
The confession from nearly sexless Subin was a fresh shock.
"And lately my body has been strange. Every time Sihyuk praises me, every time he strokes my head, my pussy gets wet without me realizing. My sexual desire keeps growing... I'm scared Sihyuk will start to hate me."
Her voice was full of fear.
I kept listening and finally understood: this had started when I once praised low-libido Subin by saying, "Even having low desire is unique and cute."
Her low libido was Subin's own special charm. Charm enough that even I had praised it.
But as desire slowly awakened inside her, she was terrified that her unique appeal would no longer work on me.
I soothed her in the same gentle voice I had used earlier.
"It's okay, Subin. The woman inside you is simply waking up. And if that desire is pointed at me, of course I'll be happy."
I started to drop my pants again and push my cock through the hole. I meant to tell her the obvious—use my cock to relieve that desire.
"Kyaah?!"
The moment her eyes met my cock through the hole, Subin let out a short scream of surprise.
I hadn't expected the scream either and jumped myself.
"I-I'm sorry. I didn't expect to see a cock all of a sudden..."
"No, no. I should have said something first. You seemed troubled by your desire, so I wanted to help you work it off."
With her low libido she really did think less about sex than the others. Most girls would startle for a second and then immediately start relieving their lust.
"I took it out so you can relieve your desire, and also so I can see how hard you've been practicing deepthroating. Put your lips to the hole."
"...Yes."
The shy yet obedient answer pleased me.
A moment later Subin's lips appeared on the other side of the hole.
I pressed my cock—still coated with Chaerin's saliva—against those lips. A faint scent of spit drifted over.
Subin kissed the head, then opened her mouth and took me in.
"Stay still."
Once again she obeyed and stopped moving.
Now it was my turn. I slowly pushed my hips forward.
My cock was long enough that deepthroating was perfectly possible even in this position.
I sank into Subin's soft, yielding mouth; the head slid past all resistance and into her throat pussy without a hitch.
"Hguup, hgeut...!"
Kkuuk.
Tight. Tighter than a pussy.
Subin made a slightly strangled sound from the lack of air, yet she never once tried to push my cock out.
She had clearly practiced deepthroating a lot at home; she clumsily adjusted the squeeze of her throat.
Her cute little tongue twitched now and then, licking along the shaft.
"Oh..."
The sensation of the head being squeezed inside her throat was strangely wonderful. An upper pussy with a completely different charm from the one below.
The physical pleasure was intense, but the mental satisfaction was even greater.
The fact that I was plunging my cock into the throat Subin used every day of her life gave me an overwhelming sense of conquest.
And I wasn't even using it normally—I was using it through a hole in a wall, like some kind of onahole.
The sense of corruption and guilt of doing this to the woman I had promised to marry mixed together and amplified the pleasure.
Hot ecstasy started at the base of my spine and slowly boiled through my entire body.
After a few thrusts of my hips I heard wet sounds from Subin's side too. She was masturbating just like Chaerin.
"Eup, uuup, uguup..."
The sight of me humping the wall looked a little ridiculous, but the rising urge to come wiped the thought away in seconds.
I concentrated only on moving my hips, the way I would when masturbating, without any thought for Subin's limits.
Subin did her best to keep up with the pace of my deepthroating. Her breathing grew more and more strained, yet she tried not to show it.
That devoted deepthroating and the crushing squeeze of her throat finally broke me; I poured my load deep into Subin's throat.
Byurrrrrt!
The first load of the day sliding down her narrow throat pussy transmitted itself vividly through my cock.
Subin must have been at her limit; her throat convulsed around me.
Even while she choked and coughed she never let go of my cock; those lips were so fucking hot.
So even knowing she was struggling, I kept my cock buried for a little longer.
Only after I had completely milked every drop did I pull out. Violent coughing erupted on the other side. She still wasn't completely used to deepthroating.
I gave her a little praise for doing so well, and the moment I finished the ten-minute timer rang.
Still coughing, Subin managed to say thank you and left the room.
After that I spent nearly three hours listening to every kind of desire from the college girls in my class. Most of them were stories about masturbating to me.
So every so often I pushed my cock through and personally relieved their lust—sometimes with kisses, sometimes with caresses.
It turned out to be a surprisingly productive stretch of time.
And at last the final turn arrived.
These footsteps, unlike the others, held no hesitation at all. It was the vice president, Cha Ayeong.
Long straight black hair, a cool cat-like beauty. As always she would be proud and perfectly composed.

When I saw her in the hallway earlier she had been wearing a headband; it had looked really pretty on her.
I waited for Ayeong's confession in high spirits. What on earth would that cold, haughty beauty confess?
And did Ayeong use me as her side dish when she masturbated, too?