Oscillator Practice

Late at night, inside the closed gym, the lights were still on.

At this hour, when even the last train had passed, only the president and several instructors remained.

And one more person.

Surrounded by muscular men, a young man could be seen.

His face still held a youthful innocence, and his handsome body wasn't as muscular as the instructors'.

Unlike them, who were dressed in athletic gear, the naked young man emitted weak moans.

Yes.

The young man was about to be forced to undergo "special training" in this gym.

His body was being altered for the president's whims.

"Ugh...ooh...ooh..."

A wet, plastic object was buried inside the young man.

The 15cm long, rounded rod, using slippery lotion, was slowly and completely inserted into his rectum.

The young man, still straight, obediently remained silent in the face of the men's unreasonable violence, but he didn't understand the meaning of it all.

Before he could even resist, the thugs, who were supposedly gym instructors, warned him as if boasting about their strength: if he didn't obey, he'd be the only one to suffer.

Two men grabbed his wrists and shoulders, one on each side, and the young man was forced to stand with his legs spread apart, forced to accept the intrusion of the foreign object.

Because it had already been dilated once with a small tensioner, it wasn't that painful, but the heavy pressure of the hard lump that rushed in through his sphincter gave him a terrifying feeling of difficulty breathing that he had never experienced before.

"Ugh...!"

The tip of the rod touched that spot in his rectum, and the young man's whole body convulsed violently.

The spot that the president was heavily rotating and caressing was the G-spot, which had been forced to bloom as an erogenous zone.

"This is the 'comfortable' spot."

Admiring the young man's blushing expression due to pleasure, the president shook the rod.

"Ah?...! Mmm... Ugh...!"

A sweet sound of desperately enduring pain escaped from his lips, and the young man's cheeks flushed crimson.

Meanwhile, the untouched penis lengthened and hardened, its raised scythe-like head swaying from side to side.

"Does it feel that good in your ass? You've really achieved the effect of practice."

The chairman, seemingly quite pleased, then squeezed the remaining part in as well.

"No...uh...mm...ooh!"

The plastic went deep inside, and the young man made a sound from his throat as if in great pain.

"It tastes good, doesn't it? This thing is 3 centimeters thick. You'll have to expand it properly in the future and eat something even thicker."

Having his body modified to satisfy the man's desires, fear made the young man open his tearful eyes.

"Are you scared? Don't worry, we'll start with this expansion today."

The chairman's gentle tone brought a sense of relief to the young man.

After enduring humiliation for several hours, the young man's body and mind had already begun to scream.

However, the hope of release was simply cut off.

"Next is the tightening exercise. No matter how wide the body opens up, it's meaningless if it can't tighten. Hey, let him sit on the resistance band."

The resistance band has footrests that can open wide to the left and right.

Each side is connected to a weight by wires. After pressing a switch, you can open it while bearing weight on your feet. It's a training machine that can strengthen the muscles around the pelvis.

The chairman pressed a button on the switch to forcibly open (the youth's) thighs.

The youth, with a vibrator in his buttocks, was placed on the resistance band seat.

His head, hands, and feet were chained, and he could no longer stand up.

The vibrator, which had loosened from his buttocks, stopped on the seat.

It was impossible to expel the vibrator from his body, the youth realized.

"You want to be played with in the front too, don't you?"

The chairman reached between the slightly opened thighs and completely peeled off the foreskin from the semi-erect penis. The urethra opened because of the pulled foreskin, and at that moment, a strange rotor was installed.

The device vibrated slightly, still covered by an elastic rubber covering.

Turning the covering over, it enveloped the penis like a condom.

This exercise involved using a lewd toy to tease the genitals.

"Shall we begin?"

The switch was pressed, and the footrest opened wide, forcing the exhausted youth to spread his legs without resistance.

No matter how much he pleaded that he had reached his limit, that he couldn't go any further, it wouldn't change anything, but there was no other way.

"What are you doing? Weren't we going to start practicing?!"

The angry man turned on the vibrator, and the youth was immediately drawn by the sweet pain, his tense abdominal muscles twitching.

"...I understand."

The chairman's voice was quiet, filled with anger.

The youth expected more beatings and kicks, and gritted his teeth.

However, after waiting for a long time, the expected barrage of punches didn't come. Instead,

the hammer was returned to its original position, and the youth was back in his half-open-legged position.

"To make you practice seriously and enthusiastically."

His eyes, wide with fear, met the president's ugly smile.

Then, he was fastened with a smaller leather belt, like chains binding his limbs.

"Even though it's twisted there, it still has weight, so it's not easy."

The president complained, grabbing his testicles and rolling them around in his hands.

"If this is stretched, you can enjoy the pleasure for a longer time."

"Ugh!"

His index finger and thumb spun around, pulling his testicles away from his body. The young man, who didn't feel much pain, stiffened.

The leather belt was wrapped around the base of his scrotum, further stretching it into a T-shape and fixing it in place. His testicles were squeezed out, becoming two spheres protruding to the left and right.

In short, it was a very stifling feeling.

"This... please take it off... please... I'll do it seriously..."

His weak pleas were not granted. Instead, a thin rope was threaded through the leather belt that had been twisting his testicles.

The two ends of the rope were tied to the footplate of the resistance band.

"Do you know what will happen if you open your legs now?"

The rope had no room to stretch!

If the footplate was opened, the rope would gather tension, and the leather strap binding the scrotum would be tightened...

"That will break... No..."

The penis might be damaged.

The young man, drained of all color from the terrifying thought, pleaded, but the cruel humiliator gave a cold laugh and commanded: "Turn on the switch."

"Ugh...ugh!"

The footrest, loaded with the hammer, opened in one go, and the young man's muscles contracted and stiffened.

The bulging veins showed how much force he was tensing.

"Good, just like that. Tighten it properly."

If he opened his legs, his scrotum would be stretched.

Unable to persuade the man, the young man could only stubbornly keep his legs closed.

"Good—how about this?"

A buzzing vibration quietly emanated from the vibrator inserted into his anus.

"Ah...ahhhhhh! Please stop...!"

The source of pleasure, stirred by the inorganic substance, was already steaming inside the young man. The lewd pleasure surged and washed over his entire body.

Tightening his legs, which were about to loosen, he could feel even more clearly the shape and movement of the thing penetrating his anus, wetly stirring his G-spot.

"Ahhhhhh...no...stop...!"

Between his gradually opening legs, the penis, covered in rubber, rose upwards.

Despite his cries of disgust, the erect penis confessed, "I'm feeling it with my ass."

"Your penis is happily erect. Your asshole is amazing."

"Your penis is already leaking fluid. Does your asshole feel that much?"

The barrage of insults no longer reached the young man's ears.

His body, overflowing with love juice and writhing, arched his back, his desperately tensing buttocks more comical than pitiful.

"Want to slack off? Not going to work harder? Well then, next up is your penis."

The rotor, invading his urethra, vibrated.

"Ughhhhhhhhh!"

The wet, sensitive penis was given a direct, mechanical caress.

With both his buttocks and penis stimulated simultaneously, the young man felt an electric shock through his waist.

"Ahhhhh! No! Waaaaaaahhhhh!"

A desperate cry of pleading escaping his lips pierced the face, a strange, almost smiling, expression of pleasure masking his sobbing.

"Ahhhhh! No! No! Help... Waaaaaaahhhhhhh!"

The man intensified the frequency of his teasing thrusts, the youth drooling as he screamed.

"You're already enjoying this much, aren't you? Well, you can let it out now."

The chairman, holding a remote control, subtly adjusted the punishments, front and back.

If the youth almost focused on the pleasure in his buttocks, he would reduce that area, instead increasing the stimulation of his penis in one go.

Unable to receive intense stimulation, the youth could only writhe in agony, his cries absurd.

The pleasure, so close yet unattainable, relentlessly tormented him.

The boiling pleasure from the center of his waist began to melt, a lewd heat enveloping his entire body.

"What's wrong? Your legs are open. Your testicles are wobbling, isn't that bad?" The gradually opening footplate pulled on the scrotum restraints , stretching the testicles

further . "

Aa ... At the same time, the rhythm of ejaculation caused spasms in his lower abdomen. His G-spot was being stimulated, his urethra being manipulated, leading to orgasm. "Eeeeeeeeeeeeeeeeeeeeeeeeeeeee!" Due to his scrotum being stretched to its limit, his vas deferens became narrow, and the ejaculation continued for an unbelievable duration. It was the first time in his life he had tasted such pleasure: intense, excruciating, and sweet. His mind was dominated by the lewd, open joy, completely unable to think about his current situation, let alone tense his leg muscles. His limp thighs were widened by the weight of the hammer. At that moment, he let out a cry that was no longer human. The young man, experiencing both excruciating pain and ultimate ecstasy while his scrotum was being pulled open during ejaculation, had transformed into a beast. His scrotum was penetrated by tiny wounds, but it wasn't broken. Only, a lightning-like pleasure, like lightning piercing his entire body, filled him. The last drop was squeezed out. Ultimate ecstasy. "Beautiful sound. Keep screaming." The man continued to skillfully manipulate his G-spot. The young man, who could no longer vomit anything, lost consciousness while experiencing the ultimate climax without ejaculation due to the stimulation of his prostate.

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