Academy Fellatio Practice: Baek Hayeon
Iseol-noona first brought up a complex anatomical diagram of the human body on the screen.
A theoretical lecture followed on how the muscles of the oral cavity—lips, cheeks, tongue, palate—moved, and how one generated the pressure required for a proper blowjob.
"When performing fellatio, you must not rely on the tongue alone. Fellatio demands that you put everything to use: the pursing strength of the lips, the soft pressure from the flesh inside the cheeks, the firm friction of the palate, and more."
Once the theory was done, she handed out the practice tools. They were silicone dildos a little smaller than my cock—though with pressure sensors packed densely across their surfaces, they were nothing like ordinary toys.
"All right. From this moment, we begin pressure-control training. Match the target pressure that appears on the screen and regulate your force with precision."
Pressure Intensity: 1
The coeds took the dildos into their mouths without a second of hesitation. Roughly twenty pressure graphs sprang up on the screen at once.
"Your first target is a soft kiss. Target pressure intensity is one. Use only a light touch and apply pressure as gently as if you were kissing a baby's cheek."
The graphs thrashed wildly. At first, most of the girls failed to control their strength.
"Chaerin, you're putting in far too much force. Do not use your tongue."
"Mmph… nngh… yes."
Chaerin bit down on the dildo again, face tight with concentration. From beside her, those slightly parted lips looked rather cute as she focused.
Subin, on the other hand, was doing surprisingly well. Her graph trembled faintly yet held a stable reading right near the target.
As time passed, everyone's graphs steadied and closed in on the mark. Nari—with her long tongue and established skill at blowjobs—kept hers locked on the target longer than anyone.
The next goal was strong suction.
"Target pressure intensity is seven. Maximize use of your cheek muscles and suck hard, as if creating a vacuum inside your mouth. This is the foundation of vacuum fellatio."
Slurp and schlick sounds rose from every corner of the classroom as the coeds' cheeks hollowed sharply inward.
This time Yeji of the track team stood out. Her graph shot past the target in an instant and hit the peak. The lung capacity and muscle she had built through training were clearly paying off even here.
Still, the one who reached the target and held her graph the steadiest was Nari. Yeji's pressure ran high, but she seemed less practiced at the finer adjustments.
The final drill was to maintain that vacuum state for as long as possible.
As the minutes dragged on, the girls' faces began to contort. A few even teared up from the strain on their jaw joints.
I leaned back comfortably in my chair and watched the whole spectacle with interest. The sight of beautiful women desperately sucking dildos right in front of me was entertainment enough on its own.
The final three who lasted through the vacuum-hold training were the blonde gyaru Yuna, long-tongued Nari, and track-team Yeji.
When first period ended, the real technical training began. Iseol-noona put a vivid 3D graphic video up on the screen.
"The first technique is spiral fellatio. From the glans down to the root of the cock, then back up from root to glans—you rotate your tongue in a spiral as you move."
On the video, a red tongue coiled up a transparent dildo as sinuously as a snake. The visual alone was lewd enough to make anyone want a blowjob.
"The key to this technique is keeping a constant speed and pressure while you move your tongue. You have to use both the tip and the sides."
Without a dildo, she stuck her tongue out into empty air and demonstrated the motion. Watching that tongue loll and spin in neat circles was, if I was honest, a little funny.
The coeds, though, did not laugh at all. Each of them stuck out her tongue against the silicone teaching aid and threw herself into practice. The way they lapped at the props looked for all the world like a litter of kittens.
Oddly enough, individual feedback began appearing on the screen.
"Subin, relax your jaw a little and focus on extending your tongue."
"Mmph… nngh… y-yes."
"Yeji, your tongue is a bit stiff. You're not properly licking the base."
"Yes!"
After the note, Yeji worked her tongue even harder.
They practiced for a long stretch until girls all over the classroom started complaining that their tongues hurt. Iseol-noona answered them sharply.
"Ladies, this is nothing. Daily Kegel exercises for your pussy and anus are the bare minimum—and you will develop your tongue muscles as well."
Next came the second technique.
"The glans sweep-up uses the broad surface of the entire tongue to stroke gently upward from the root all the way to the tip of the glans."
That one, too, we had to watch on video and then study as she lapped at empty air again.
"Chaerin, think less of licking and more of wiping it clean—move softly."
"Haa… yes."
After the feedback, Chaerin shot me a quick glance and went back to licking her teaching aid with renewed effort.
"The next technique, lip rubbing, alternates the upper and lower lips against the shaft of the cock, delivering a soft friction distinct from anything the tongue can offer."
New technique explanations and drills continued for a full two hours. Beads of sweat had gathered on the coeds' foreheads. Their eyes held nothing but a burning desire to learn how to please a man even better.
And at last, the moment arrived to put that desire into practice.
"All right. Now it is time for hands-on practice with Model Sihyuk."
The instant the words left her mouth, the air in the classroom turned scorching hot.
Just like yesterday, I sat in the chair at the center of the platform and stripped off my pants. After a morning of theory and the girls' heated stares, my cock was already fully hard.
"As with yesterday, I will demonstrate first."
Iseol-noona stepped to the front of the platform. She dropped to the floor at my feet and, without a flicker of hesitation, assumed the dogeza position.
Even on a second viewing, that perfect posture of submission made the girls and me alike nod in approval.
She carefully lifted her head and pressed only her lips to the tip of my cock in a light kiss before pulling away. A soft, warm touch. My cock twitched in reflex.
Her kisses started at the glans, traveled down the shaft, and continued with meticulous care all the way to my heavy balls.
What a fucking arousing kiss routine.
Once she had paid homage to every part, she finally took my cock into her mouth.
Schlick.
A warm, wet sensation wrapped my entire length.
She began the demonstration exactly as taught, starting with spiral fellatio. Her tongue set out from my glans and traced a fluid spiral down toward the root, as if a snake were coiling around a tree and sliding off. Then it licked its way back up from root to glans. A peculiar pleasure lingered wherever her tongue had passed.
"This is spiral fellatio. It stimulates every surface of the cock and gradually preheats the male."
She delivered the commentary even while she sucked. Her voice was soft, yet it carried the professional edge of an academy instructor.
Next was the glans sweep-up. The tongue that carefully climbed from root to glans left me deeply satisfied.
One by one she properly demonstrated every shaft-service technique. And finally, she performed the complete form of fellatio—combining the glans service we had learned yesterday with the shaft service of today.
"Ohh…"
It was artistry, pure and simple. Inside her mouth, my cock might as well have been a musical instrument. She would envelope it softly one moment and suck hard the next; tickle with her tongue, then rub with her lips. Not a single second grew dull.
Holy shit. For real…
I leaned back in the chair, closed my eyes, and sank into that ecstasy. The stimulation was nearly a shock—I almost jerked my hips away without meaning to.
"If the male ejaculates, after drinking the semen you must stick out your tongue like this to show that you have drunk it properly. That concludes the demonstration. Now it is your turn."
She licked my precum from the corner of her mouth and smiled in satisfaction. The classroom stirred with a heat thick with excitement.
But I had no intention of letting the other girls practice just yet.
My gaze locked onto the back of the room—onto the one person standing with her arms folded, watching the entire scene unfold.
"Baek Hayeon."
At my call, every sound in the classroom died. Hayeon's shoulders flinched.
"Aren't you going to practice?"
Panic was plain on her face, but she forced a casual answer.
"I'm a guy, so I don't do that kind of thing."
"That so? Yesterday behind the warehouse, all alone…"
"W-wait—wait! Fine, I'll do it!"
I hadn't really meant it as blackmail, but the thought of having her secret masturbation exposed in front of everyone was apparently too much. Hayeon strode up onto the platform.
Fair enough. If she hadn't been embarrassed, she would have used a masturbation booth in the infirmary instead of some hidden corner.
She dropped to her knees in front of me. Her hands trembled, and her eyes stayed fixed on the floor.
"……"
Hayeon hesitated a long time. At last, with shaking fingers, she gripped my cock and brought it toward her mouth.
"Hold on."
It was Iseol-noona who stopped her.