Chapter Seven: The Labyrinth of Identity

Yuuma looked up from his desk, sunlight streaming through the classroom window and illuminating his face with a blinding glow. He blinked, his mind still reeling from the chaotic memories of last night—Aunt Ayako's gentle smile, her full breasts, her legs encased in black stockings, and the grayish-white tissue that gushed from her mouth during her orgasm.

No, it's not Aunt Ayako.

It's stardust.

Stardust, disguised as Aunt Ayako, used maternal tenderness and the allure of a mature woman to completely drag him into the abyss of desire. And during that process, he not only didn't resist, but instead…enjoyed it, even calling out the word "Mom."

Yuzhen felt a wave of fear wash over him. He looked around; the classroom was already full of students, the teacher was explaining math formulas on the podium, and the chalk was making a rhythmic tapping sound on the blackboard. Everything seemed so normal, so peaceful, as if the crazy things that happened last night were just a dream.

But he knew it wasn't a dream.

His body still remembered—the soreness in his lower back, the slight bruising on his inner thighs, and the lingering sensitivity on his penis from overuse. His sense of smell remembered—the fishy smell of semen, the sour smell of sweat, the sweet fishy smell of vaginal secretions, and the unique, slightly humus-like scent of Stardust's own mucus.

His sense of taste still remembered—the salty, fishy smell of semen on Aunt Ayako's breasts, the slightly sweet taste of Stardust's saliva, and the complex, faintly metallic taste of his own semen.

It all felt so real, so real, that it terrified him.

But amidst the fear, there was also a strange... anticipation.

He knew this was wrong, that this relationship was abnormal, and that Stardust's possessiveness and controlling nature had gone beyond normal limits. But he couldn't deny that under Stardust's control, his life had indeed changed—someone protected him, someone cared for him, someone cooked for him, someone solved his problems, and someone... gave him **** pleasure through their body.

This contradictory feeling confused him and made him feel exhausted.

"Fujiwara-kun?"

A gentle voice sounded from beside her. Yuuma turned around and saw the class representative, Onodera Aoi.

Aoi stood beside his desk, holding several reference books. She was wearing her standard school uniform today, but Yuuma noticed some details—the top two buttons of her white shirt were undone, revealing her fair neck and collarbone; her pleated skirt was a little shorter than usual, the hem falling just to mid-thigh; and most importantly, her legs—those slender legs were encased in a pair of brand-new black pantyhose, the pantyhose being very thin and sheer, allowing the skin's color to be clearly seen in the sunlight.

"Class monitor..." Yuzhen greeted him softly.

"You look a little tired," Aoi said with a smile, her voice soft. "Didn't you sleep well last night?"

"Yes, a little..." Yuzhen lowered her head, not daring to look into her eyes.

Aoi didn't ask any further questions, but instead placed a reference book on Yuuma's desk.

"Actually... there's something I'd like to ask you for help with," she said, her voice tinged with embarrassment. "I've always struggled with trigonometric functions in math. I heard you got first place in the class this time... could you... teach me?"

Yuuma was stunned. He looked up at Aoi.

Aoi's face flushed slightly, and her fingers unconsciously twisted the hem of her skirt. Her eyes were sincere and full of expectation.

"I...I might not be a good teacher..." Yuzhen said softly.

"It's okay," Aoi smiled, a warm smile. "I'd be very grateful if you could just take a look at it for me. After school... at the library, is that alright?"

Yuuma hesitated for a moment. He remembered what had happened last night, Stardust's warning, and the feeling of being completely controlled. But looking into Aoi's sincere eyes, he finally nodded.

"Okay...okay."

Aoi's smile grew even brighter. She leaned closer and whispered, "It's a deal then, see you at the library after school."

Then she turned and left, returning to her seat. But in that instant, Yuuma saw—a meaningful smile playing on Aoi's lips.

The smile was brief, fleeting, but Yuma saw it clearly.

That smile... it's so familiar.

Just like the smile Stardust showed when saying goodbye at the school gate yesterday afternoon.

Yu-chan's heart skipped a beat.

No, that's impossible.

Aoi is Aoi, the class monitor, a good student, a gentle and kind girl. How could she possibly be Stardust? Stardust should be inside Sato Misaki's body right now, or... inside Aunt Ayako's body.

But that smile...

Yuzhen shook his head, trying to shake off those thoughts. He must be being too sensitive; his judgment must have been clouded by what happened last night.

He lowered his head and continued listening to the lesson, but his mind was no longer on the blackboard.

After school, Yuuma went to the library as promised. The library was located at the far end of the first floor, and it was usually quiet with few people. He pushed open the door and went in, where he saw Aoi sitting by the window.

Aoi sat at a long table, her math reference book and notebook spread out in front of her. Sunlight streamed in through the window, bathing her in a golden glow. Her hair shimmered with a deep brown sheen in the sunlight, her profile was soft, and her long eyelashes cast soft shadows on her cheeks.

She was wearing her school uniform, but Yuma noticed something different—her blazer was off, draped over the back of the chair, leaving her in only a white shirt. The shirt sleeves were rolled up to her elbows, revealing her slender forearms. Three buttons of the shirt were undone, and the collar was open, revealing the black bra straps and the white flesh of her breasts peeking out from the edge of the bra.

Her pleated skirt was also... shorter than it had been in the classroom. The hem had ridden up considerably, now barely covering the top of her thighs. When she sat down, a large expanse of her skin, the top of her black pantyhose, was clearly visible between the hem and her thighs, revealing a glimpse of her ecchi territory.

Moreover, her posture... was very casual. Her legs weren't together, but slightly apart, with one foot resting on the ankle of the other. This posture caused her skirt to slide to the sides, revealing more of the skin on her inner thighs.

Yuma walked over and sat down opposite her.

"You've come." Aoi looked up and smiled at him. Her smile was gentle, but there was a deeper meaning in her eyes that Yuuma couldn't understand.

"Hmm..." Yuzhen said softly, placing her schoolbag on the table.

“Let’s begin.” Aoi pushed the reference book in front of him and pointed to a problem on it. “This problem… I’ve never quite understood it.”

Yuzhen glanced at the question; it was a comprehensive trigonometric function problem, and it was indeed quite difficult. He picked up his pen and began to explain.

"First, we need to transform this formula..."

He spoke very earnestly and carefully. Kui listened attentively, nodding occasionally and asking questions now and then. Her questions were all insightful, showing that she had indeed thought about them carefully, but her foundational knowledge was indeed somewhat weak.

About half an hour later, the explanations for the difficult problems were finished. Aoi closed the reference book and let out a long sigh of relief.

“Thank you,” she said, her eyes filled with gratitude. “You explained it so well, even more clearly than the teacher.”

"N-nothing..." Yuma said softly, her face slightly red.

“Really,” Aoi said earnestly. “You’re really smart. Not just in math, but in other subjects too… I heard you did very well in English and Chinese as well.”

Her fingers tapped lightly on the table, her gaze lingering on Yuzhen's face.

“You’ve changed a lot lately,” she said softly. “You’ve become more confident, more…charming.”

Yuuma was stunned. He didn't know how to answer.

Kui smiled. She stood up and began packing her things.

“Let’s go,” she said. “It’s getting late.”

Yuma also stood up and packed her things. The two walked out of the library together and came to the stairwell.

The library was on the second floor, and you had to go down a flight of stairs to get to the first floor. The stairwell was quiet, with only the sound of their footsteps.

When they reached the middle of the stairs, Aoi suddenly let out a cry of surprise.

"ah!"

Her body leaned forward, her ankle twisting at an unnatural angle. She reached out to grab the handrail, but missed, and fell down the stairs.

"Class monitor!" Youzhen rushed over and helped her up. "Are you alright?"

Aoi sat on the ground, clutching her ankles with both hands, a pained expression on her face.

"My ankle...I think I twisted it..." she whispered, her voice trembling with tears, "It hurts so much..."

Yuma looked down. Aoi's right ankle was indeed a little red and swollen. The nylon fibers of her black pantyhose were stretched taut due to the swelling, and the redness of the skin underneath could be seen.

"Can you stand up?" Yuma asked.

Aoi tried, but as soon as she stood up, she fell back down.

"No...it hurts so much..." Tears welled up in her eyes.

Yuma hesitated for a moment, then squatted down.

“I’ll carry you on my back,” he said. “To the infirmary.”

Aoi looked at him with a complicated expression. Then she nodded.

"Thanks……"

Yuuma turned around, his back to Aoi. Aoi climbed onto his back, wrapping her arms around his neck. Her body was light and soft, her breasts pressed against his back, providing a soft touch. Her legs were slender, and Yuuma could feel the warmth and elasticity of her skin beneath her black pantyhose as he supported her thighs with his hands.

He carried Kui down the stairs, out of the teaching building, and headed towards the infirmary.

Throughout the journey, Aoi remained silent, simply pressing her face against his back, her breath gently caressing his neck. Her body swayed gently with his steps, her breasts rubbing against his back, providing a subtle stimulation.

Yuzhen could smell her scent—the floral fragrance of shampoo, and a faint, subtle natural scent characteristic of a young girl. The scent was clean and refreshing, completely different from the complex, sensual aroma emanating from Stardust.

But for some reason, Yuuma always felt... something was wrong.

The infirmary was in a small building behind the teaching building, and it was rarely visited. Yuzhen pushed open the door and went inside. It was empty, with only a few beds and some basic medical equipment.

"The teacher doesn't seem to be here..." Yuzhen said.

"It's okay..." Aoi said softly, "Put me on the bed first."

Yuma carried Aoi to a hospital bed and carefully laid her down. Aoi sat on the edge of the bed, still clutching her ankles, her face contorted in pain.

"Let me see..." Yuma squatted down, wanting to check her ankle.

But Aoi suddenly smiled.

That smile was sudden, very… eerie. One second she looked pained, the next she had a bright smile, her eyes filled with cunning and… seduction.

“Yu-chan,” she said, her voice no longer gentle, but with a playful tone, “you are really kind.”

Yuuma was stunned. He looked up at Aoi.

Aoi's smile grew even brighter. She released her grip on her ankle, and the redness and swelling... were visibly subsiding. A few seconds later, her ankle was back to normal, with no trace of injury.

“You…” Yuma stammered, “your foot…”

"My foot is fine," Aoi said with a smile, lifting her right foot and starting to take off her shoe.

She was wearing black loafers, the uppers of which were very clean. She untied the laces, took off the shoes, revealing her feet encased in black pantyhose. The pantyhose were very thin, clearly showing the shape of her feet—slender insteps, delicate ankles, long toes, and neatly trimmed nails painted with light pink nail polish.

She casually tossed her first shoe on the ground and then began to take off the other. After removing both shoes, she lifted her feet and placed them in front of Yuuma.

“Look,” she said, her voice seductive, “aren’t my feet…beautiful?”

Yuzhen stared at the feet encased in black pantyhose, her throat tightening. The nylon fibers of the pantyhose clung tightly to every curve of the foot, from the ankle to the instep, from the arch to the toes, every detail clearly visible. At the toes, the outlines of the five toes were slightly raised, the color of the toenails shimmering with a faint pinkish sheen through the thin nylon.

Furthermore, Yuuma noticed that the soles of the pantyhose were somewhat...dirty. Not obvious grime, but rather fine dust and fibers stuck to the nylon fibers, gleaming subtly under the light. It was dirt picked up while walking, dust from the ground, fibers from the carpet,...dirt from the real world.

“Come on,” Aoi said, her voice soft but clear, “give me a massage. My feet are a little sore from walking so much.”

Yuuma stiffly reached out and grasped Aoi's right foot. The pantyhose felt incredibly smooth; the nylon fibers were soft and supple, and the skin beneath was warm and elastic. He could feel the shape of the foot bones, the arch of the foot, and the joints of the toes.

He began the massage, starting from the ankle and slowly moving upwards to the instep, the arch, and the toes. His movements were gentle and careful, as if he were handling a fragile treasure.

Aoi let out a satisfied sigh. She closed her eyes, leaned back, and braced herself on the bed with her hands.

"Mmm...that feels good..." she whispered. "Your hands...are so gentle."

Yuuma continued the massage. His fingers moved across Aoi's feet, pressing each acupoint and kneading each muscle. He could feel Aoi's feet slowly relaxing in his hands, and he could feel her breathing becoming steady and deep.

But soon, he sensed some changes.

Aoi's feet began to respond to his massage. Her toes curled gently, rubbing against his palms; her arches arched slightly, fitting against his fingers; her ankles rotated gently, allowing his massage to reach more areas.

Moreover, Aoi's breathing... became somewhat rapid. A faint blush rose on her cheeks, and her lips parted slightly, emitting soft panting sounds.

"Ah...there...a little harder..." she whispered, her voice filled with obvious pleasure.

Yuuma's fingers stopped. He looked up at Aoi.

Aoi opened her eyes and looked at him, her gaze hazy and alluring.

"What's wrong?" she asked, her voice hoarse. "Keep going..."

Yuma hesitated for a moment, then continued the massage. But this time, Aoi's feet began to "guide" his movements more actively. Her toes hooked around his fingers, pulling his hand to the sole of her foot; her arches rubbed against his palms, bringing a slight tickle; her ankles rotated, allowing his fingers to penetrate deep into the gap between his pantyhose and skin.

Then, Aoi suddenly did something that Yuuma never expected.

She lifted her right foot, hooking her toes around Yuuma's chin and lifting his face. Then, her foot continued upwards, the back of her foot gently rubbing against his lips.

"Lick," she said, her voice soft but carrying an undeniable command.

Yuuma was stunned. He stared at the foot encased in black pantyhose, at the slightly raised toes at the toes, at the tiny specks of dust and fibers on the bottom of the pantyhose, and at the part of the pantyhose that had become translucent due to stretching, revealing the skin underneath.

Then he opened his mouth.

His tongue darted out and licked Aoi's instep. The nylon fibers of the pantyhose rubbed against his tongue, creating a rough and peculiar sensation. He could taste the dust, the nylon, and a faint, almost imperceptible, salty scent of foot sweat.

Aoi let out a satisfied hum. Her toes gently stirred in Yuuma's mouth, rubbing against his tongue and pressing against his palate.

"Mmm...good boy..." she gasped, "licking...so earnestly..."

Her feet continued to swirl in Yu-chan's mouth, her toes gripping his tongue and gently pulling it; the back of her feet rubbed against his teeth, causing a slight stinging sensation; the arch of her feet pressed against his jaw, making him open it wider.

Soon, Yuuma's mouth was filled with the taste of pantyhose fibers and dust. His saliva increased, soaking the pantyhose and making the nylon fibers even more transparent and clinging to his skin.

Aoi pulled her foot out, leaving a trail of silvery saliva. She looked at her wet foot and the dark water stains on her pantyhose, which were soaked with saliva, and laughed.

“Pervert,” she said, her voice laced with amusement. “To lick a girl’s feet so earnestly… what a pervert.”

Yuuma's face instantly turned bright red. He wanted to explain, but Aoi didn't give him a chance.

Aoi suddenly stood up, her movements so agile that she didn't seem to have an injured foot at all. She walked up to Yuuma and looked down at him.

Then she lifted her foot and stepped on Yuuma's chest.

His black pantyhose-covered feet made direct contact with his school uniform shirt, and the tiny dust particles and fibers from the soles of the socks immediately stuck to the white fabric, leaving faint gray marks. Aoi pushed Yuuma backward forcefully.

Yuzhen staggered backward, her back hitting the hospital bed, and she fell onto the bed.

Aoi didn't stop. She stepped forward, placing one foot on the edge of the bed and raising the other to land on Yuuma's thigh. Then her foot continued moving upwards, reaching his crotch.

Yuzhen could feel the weight of that foot, the rough texture of the nylon fibers in the pantyhose, and the fine particles of dust seeping through the fabric from the bottom of the sock.

Then Aoi stepped on his penis.

Through his school uniform pants and underwear, Yuzhen could clearly feel the shape of that foot, the arch of the foot perfectly fitting his erect penis, and the toes gently pressing against the glans.

"Ah..." Yuma couldn't help but groan.

Aoi laughed. She began to move her feet, rubbing Yuuma's penis with the arch of her foot. Her movements were slow and forceful, each rub causing the penis to sink deeper into the hollow of her arch.

The nylon fibers of the black pantyhose rubbed against the fabric, making a soft rustling sound. Dust and fibers from the soles of the pantyhose fell off during the friction and stuck to Yuzhen's pants, leaving faint gray stains on the dark blue fabric.

"Does it feel good?" Aoi asked breathlessly, her cheeks flushed. "Does it feel good to be stepped on like this by a girl's feet?"

"So...comfortable..." Yuma whispered.

"Then... how about this?" Aoi quickened her movements, rubbing her arches faster and harder. Her toes curled, gripping the base of the penis and squeezing gently; her heels lifted, pressing the glans with the softest part of her soles.

Yuu could feel the pleasure building and intensifying. His penis was fully erect at Aoi's feet, creating a noticeable bulge through the fabric. Pre-ejaculate seeped out, soaking his underwear and the pantyhose on Aoi's feet.

The soles of the pantyhose became even more transparent from being soaked with both saliva and pre-tripping fluid, clinging tightly to Aoi's skin. Dust and fibers were trapped by the liquid, forming mottled stains on the nylon fibers.

"Ah...I'm...I'm going to come..." Yuma gasped.

“Go…” Aoi said, her feet quickening their pace, “shoot it out…shoot it on my feet…”

A few seconds later, Yuma's waist convulsed violently, and spurts of semen shot out. The warm semen soaked through his pants and underwear, and also dampened Aoi's pantyhose. The crotch of his white school uniform pants was quickly stained dark, as the semen seeped through the fabric, forming a sticky, semi-transparent wet patch on his dark blue pants.

Aoi could feel the warmth and dampness emanating from the soles of her feet. She stopped moving, lifted her feet, and looked at the area on the soles of her feet that was soaked with semen—the soles of her black pantyhose were now completely transparent, clinging tightly to her skin, the white, cloudy semen clearly visible through the nylon fibers, mixed with the dust that had previously adhered to them, forming a dirty, filthy mixture. A few fine, curly pubic hairs were stuck to the soles of the pantyhose with semen, swaying gently with her movements.

She smiled, a smile full of satisfaction and a sense of control.

"He shot so much..." she said softly, placing her other foot on Yuuma's still slightly twitching abdomen. "He's such an... energetic boy."

Yuzhen lay limp on the bed, panting heavily. The crotch of his school uniform pants was completely soaked, and semen was slowly seeping from the fabric, dripping onto the white sheets and leaving dark dots. His shirt was also disheveled from the struggle, and there was a gray stain from Kui's feet on his chest—a mixture of dust and fibers, which stood out starkly against the white shirt.

Aoi withdrew her foot, sat on the edge of the bed, and began to examine her feet carefully. She smeared a little of the semen mixture from the bottom of her sock with her finger; it was sticky and warm, mixed with the grainy texture of dust and the distinctive fishy smell of semen. She put her finger in her mouth and slowly sucked on it, her eyes slightly narrowed, as if savoring something delicious.

"Mmm..." she hummed contentedly, "Your scent... mixed with the scent of dust... is quite interesting."

She stood up and walked to Yuzhen. Yuzhen was still in a daze after ejaculation, looking at her with a confused expression.

Aoi leaned down, placing her hands on either side of Yuuma's body, her face very close. Her breath brushed against Yuuma's face, carrying a faint, youthful fragrance, but Yuuma could detect a hint of semen mixed in—the lingering taste from when Aoi had been sucking her fingers.

“Yuzhen-kun,” she said softly, her voice tinged with amusement, “were you just now… wondering if I am Stardust?”

Yu-chan's eyes widened suddenly.

Aoi smiled. It was a bright, familiar smile.

“Answer me,” she said, her fingers gently tracing Yuuma’s cheek. “Are you… doubting me?”

“You…” Yuma stammered, “You really are…”

"What is it?" Aoi tilted her head, her expression innocent. "Is it the class representative, Onodera Aoi? Or... something else?"

Her fingers slid from Yuzhen's cheek to her lips and pressed gently.

“Tell me,” she said, “who do you want me to be?”

Yuuma looked at her, at the gentle and innocent face that belonged to the class president, but with eyes that held the possessive and controlling gaze of Stardust. He finally realized—the person before him was not Onodera Aoi.

It's stardust.

Stardust changed her body, her identity, and her methods to approach him, to seduce him, and... to possess him.

“Stardust…” Yuma whispered.

Aoi—no, Stardust—smiled. It was a radiant, triumphant smile.

“You got it right,” she said, gently tapping Yuuma’s nose with her finger. “Here’s a reward for you.”

She straightened up and began to take off her clothes.

First, she tossed her suit jacket onto the floor. The jacket landed on the not-so-clean floor of the infirmary—dust, tiny scraps of paper, and some unidentifiable black grime. The expensive dark blue suit jacket immediately became stained with that grime, and a patch of gray dust clung to the cuffs.

Then came the shirt. She unbuttoned it one button at a time, slowly and gracefully. The shirt was completely open, revealing a black bra underneath. The bra was made of lace, semi-transparent, and the shape of her breasts and pink nipples were clearly visible.

She threw the shirt on the floor as well, and it landed next to the suit jacket. The pristine white fabric immediately became stained with dirt from the floor. A small black stain stained the collar, possibly machine oil or mold.

Next came the skirt. She unzipped the side, and the pleated skirt slid to the floor, bunching at her ankles. She kicked the skirt away, sending it flying to a corner of the room, landing next to a trash can. Inside the trash can were some used cotton swabs and gauze, stained with dark red blood and yellow medicine. The hem of the skirt brushed against the edge of the trash can, picking up some stains.

Now, Stardust is only wearing a black bra, a black thong, and black pantyhose that are covered in semen and dust.

The pantyhose were in terrible condition—the soles were completely soaked with semen, becoming transparent and sticky, with a few pubic hairs and dust particles clinging to them; the knees were covered in tiny fuzz balls from kneeling on the edge of the bed, with fibers and dust from the sheets stuck to them; there were faint, dried semen stains on the inner thighs, splashes from Yuzuru's ejaculation; the cuffs were loose, the nylon fibers having lost their elasticity from repeated stretching.

But Stardust didn't care at all. She even enjoyed this dirty state.

She walked up to Yuzhen, reached out and unbuckled his belt, unzipped his pants, and pulled them down to his knees along with his underwear. Yuzhen's penis was still semi-erect, covered in the semen he had just ejaculated; the cloudy liquid was slowly dripping down the shaft and onto the sheets.

Stardust knelt down.

Her black pantyhose knees touched the dirty floor of the infirmary—a floor covered in dust, fine sand, and dark, unidentifiable stains. Her knees sank into the grime, and the nylon fibers of the pantyhose immediately absorbed the gray dust and black stains.

She looked up at Yuuma, then opened her mouth and took his semen-covered penis into her mouth.

Warm, moist, and firm.

Yuzhen gasped. He could feel the warmth of Xingchen's mouth, the agility of her tongue, and the contractions deep in her throat. But more importantly, he could taste—no, Xingchen could taste—the taste of his semen, mixed with the smell of the dust from her own feet, mixed with the smell of the grime on the infirmary floor.

Stardust began to swallow. Her technique was excellent; her tongue deftly licked every sensitive spot on the glans, cleaning away all the remaining semen before swallowing. Her lips tightly enveloped the shaft, and the rhythmic contractions deep in her throat sent intense stimulation through the penis.

Soon, Yuzhen's penis became fully erect again in her mouth. This time, she didn't use her hands, but only her mouth, to bring him to a second orgasm.

The semen shot deep into her throat. She swallowed, her Adam's apple bobbing, swallowing all the semen. Then she spat out the penis, licking the glans clean with her tongue, cleaning up the last few drops of semen.

But this time, she didn't stand up immediately.

A strange sound came from her throat—not the sound of human swallowing, but some kind of sticky, wet sound. Her mouth was wide open, and grayish-white tissue gushed out.

The tissue gushed from her mouth, covering her tongue, teeth, palate, and even overflowing from the corners of her mouth, running down her chin. At the same time, slender, silvery-gray, translucent tentacles—covered in mucus—emerged from her ears, swaying with the trembling of her body.

Large amounts of clear mucus seeped from her mouth, nose, and ear canals, dripping onto the ground and mixing with dust and grime to form a thick, dirty puddle.

This is Stardust's true form—it briefly manifested when control became unstable again at the peak of sexual climax.

“Yu…Makoto…” Stardust’s voice came from the grayish-white tissue, muffled but still recognizable, “I’m…sorry…I…lost control again…”

Her body was still convulsing, and more grayish-white tissue gushed from her mouth. Her tentacles extended further from her ears, flailing limply in the air. The oozing mucus increased, forming a small puddle on the ground.

About a minute later, Stardust's body stopped convulsing. The grayish-white tissue slowly retracted into its mouth, and the tentacles also retracted into its ears. The oozing mucus gradually decreased.

She looked up at Yuuma with a mischievous grin on her face.

“I’m sorry,” she said, her voice returning to normal, “I always lose control when I orgasm.”

She stood up, the knees of her pantyhose now stained with grime from the ground—dust, sand, and the sticky fluid that had seeped from her own body. The grime had seeped into the nylon fibers, forming dirty spots. Some clear, sticky fluid lingered at the corners of her mouth, slowly dripping down her chest, leaving a sticky residue on her fair skin.

But Stardust didn't care. She even smeared some of the saliva from the corner of her mouth with her finger and then applied it to her nipples. The saliva spread across her pink nipples, shimmering under the light.

“But…” she said with a smile, “this is not bad either, is it?”

She climbed onto the bed and straddled Yuuma. Her vaginal opening was directly in front of Yuuma's erect penis. It was wet and warm, and some clear mucus could be seen slowly flowing out—it was the mucus seeping from her own body, mixed with the previous vaginal fluid, forming a unique liquid with a slightly humus-like smell.

“Come on,” Stardust said, his voice full of temptation, “this time… let’s enjoy ourselves.”

She held Yuuma's penis, aligned it with her vaginal opening, and then slowly sat down.

"Ah..." they both groaned at the same time.

His penis entered her vagina. It was tight, hot, and wet. But Yuu could feel something different—the sensation of the vaginal walls was more…complex than usual. It wasn’t just the tightness of the muscles and the friction of the folds; there was also a sticky, slippery feeling, as if some kind of mucus was gushing out from deep within, enveloping his penis.

Stardust began to move her body up and down. Her movements were slow and forceful, each time she sat down, the penis penetrated deeper. Her hands rested on Yuuma's chest, her body rising and falling. Her thighs, encased in black pantyhose, taut with effort, the muscle lines beneath the nylon fibers clearly visible. Dirt from the knees of the pantyhose rubbed off, some dust and sand falling onto Yuuma's lower abdomen, leaving a slight stinging sensation on her skin.

"Ah... Yuma... so deep..." Stardust gasped, her voice trembling with tears, "Your cock... is inside so deep... all the way in..."

Her vagina contracted violently, the muscles of the inner walls tightly gripping Yuzhen's penis, creating a strong sense of pressure. Thick, sticky fluid gushed from deep within, smearing the penis and making entry and exit smoother, but also making it more... filthy.

Yuujin could smell that unique aroma—the fishy smell of semen, the sweet fishy smell of vaginal fluid, the earthy smell of dust, and the slightly humus-like scent of Stardust's own slime. These smells blended together to create a complex, nauseating yet exciting odor.

He could see the grime on Stardust's body—the sticky residue at the corners of his mouth, the sticky smeared on his chest, the dust and semen on his pantyhose, the stains on his knees. He could see the filth of the infirmary—the dust and stains on the floor, the semen stains on the sheets, the medical waste in the trash can in the corner.

It was all so filthy, so disgusting.

But for some reason, this filth and grime only excited Yuuma more.

His hands gripped Stardust's buttocks, his fingers sinking into the flesh encased in black pantyhose. The nylon fibers of the pantyhose deformed in his palms; he could feel the warmth and softness of the skin beneath, as well as the rough texture of the dirt on the pantyhose.

"Ah... Stardust... So tight..." Yuzhen gasped, her waist involuntarily thrusting upwards, allowing her penis to penetrate even deeper into the wet, hot passage.

Stardust's hands slid from Yuuma's chest to his shoulders, her nails digging deep into his skin, leaving red scratches. Her body undulated violently with the rhythm of her thrusts, her breasts, encased in a black lace bra, swaying up and down, the flesh overflowing from the bra's edges, tracing erotic arcs in the air. The lace fabric of the bra was already soaked with sweat; the dark water stains were not obvious on the black fabric, but upon closer inspection, one could see that the originally delicate lace pattern was now sticky and unsightly from sweat and the previously applied fluid, and a few fine, curly pubic hairs clung to the lace, swaying gently with the movement of her breasts.

"Mmm... Yu-zhen's... big cock... feels so good inside..." Xingchen uttered lewd words intermittently, her voice trembling with pleasure, "The class monitor's... little hole... is... completely... messed up by the junior's cock..."

She deliberately used the class monitor's innocent voice to utter these obscene words, and the contrast excited Yuuma even more. He could feel his penis swelling inside Stardust's vagina, the glans pressing against a particularly sensitive depth.

“There…it’s there…” Stardust suddenly screamed, her body trembling violently, “My cervix…it’s being pushed against…ah…it’s going to break…my uterus is going to break…”

Her vaginal walls began to spasm rhythmically, and a warm liquid gushed from deep within—not ordinary vaginal fluid, but a special liquid mixed with her own body fluids, carrying a slightly humid smell. The liquid gushed out in large quantities, flowing down from where the two were joined, soaking Stardust's black pantyhose on her inner thighs and also wetting Yuuma's lower abdomen.

The inner thighs of the pantyhose were now completely soaked, dark water stains running from the crotch down to the knees. The nylon fibers clung tightly to the skin, outlining the lines of the inner thigh muscles as the liquid seeped through. The liquid, a mixture of semen, vaginal fluid, dirt, and mucus, formed sticky, reflective marks on the black pantyhose.

Stardust's hands slid from Yuuma's shoulders to his cheeks, cupping his face and forcing him to look at her.

“Look at me…” she gasped, a trace of clear saliva still clinging to the corner of her mouth, “Look at this face…this is the class monitor’s face…the face of that gentle, kind, academically excellent class monitor whom everyone liked…”

Her fingers lightly traced Yuuma's cheek, her nails stained with gray dirt—dust she'd picked up while leaning on the ground.

“But now…” Stardust laughed, a twisted and lewd smile, “this face… is climaxing because of your cock… is showing this… filthy expression because of your junior’s penis…”

As she spoke, her body moved more rapidly, each time she sat down with greater ****, causing his penis to almost completely penetrate her. The black pantyhose-clad buttocks collided with Yuma's lower abdomen, producing a dull thud of flesh against flesh. Tiny fuzzy balls of fur formed at the crotch of the pantyhose from the friction, glistening with a mixture of bodily fluids and gleaming unnaturally under the light.

"Ah...it's coming...it's coming again..." Stardust screamed, her body tense like a bowstring, "With the class monitor...with this good student...let's climax..."

Her vagina contracted violently, and her cervix sucked at Yuuma's glans as if it were alive. The suction was so strong that it pushed Yuuma to his limit.

"I...I also..." Yuzhen gasped, her waist convulsing violently.

“Shoot it in…” Stardust roared in his ear, his voice distorted with pleasure, “Shoot it into the class monitor’s womb…make the good student…get pregnant with the junior’s child…”

This sentence became the final catalyst. Yuuma's waist convulsed violently, and his semen shot into the depths of Stardust's vagina in spurts. This ejaculation was more intense and lasted longer than any before. He could feel the semen filling Stardust's vagina, and even feel some of it being drawn deeper into her cervix.

Stardust's body trembled violently with the rhythm of ejaculation, and that sticky, wet sound came from her throat again. Grayish-white tissue spilled from the corners of her mouth, but this time she didn't completely lose control—the tissue only gushed out briefly before receding. Clear mucus seeped from her mouth and nose, dripping onto Yuuma's chest, mixing with his sweat.

After the last drop of semen was ejaculated, both of them collapsed onto the bed, limp and exhausted. Stardust lay on top of Yuzhen, her face pressed against his chest, panting heavily. Her body was still trembling slightly, and her vagina was still contracting rhythmically, as if squeezing out the last bit of semen.

A mixture of fluids gushed from their point of union, soaking the sheets. The white sheets were now covered in a variety of stains—the pale yellow of semen, the clear color of vaginal fluid, the gray of dust, and the milky white of mucus. These colors blended together, forming a filthy, indescribable stain.

Stardust's black pantyhose were now completely ruined. The soles were soaked with semen and dust, becoming transparent and sticky; the knees were covered in dirt from the ground, with gray dust and black stains seeping into the nylon fibers; the inner thighs were soaked with a mixture of bodily fluids, with dark water stains spreading to the groin; the cuffs were loose, the nylon fibers had lost their elasticity from repeated stretching, and the edges were frayed.

Her bra and thong were covered in all sorts of grime. Dust and pubic hair clung to the lace of her bra, and the dried fluid applied to her nipples had formed a thin, translucent film. The thin straps of her thong were embedded in her buttocks, clinging to a mixture of vaginal fluid that was slowly trickling down the straps and dripping onto the sheets.

Yuu's condition wasn't much better. His school uniform shirt had gray stains from Stardust's feet on the chest, red scratches on his shoulders, and his chest and abdomen were covered in Stardust's saliva. His pants were pulled down to his knees, his penis was still semi-erect, covered in a mixture of semen, vaginal fluid, and saliva, the viscous liquid slowly dripping down his thighs.

The infirmary was filled with a pungent odor—the fishy smell of semen, the sweet fishy smell of vaginal fluid, the sour smell of sweat, the earthy smell of dust, and the unique, slightly humus-like scent of stardust's own mucus. These odors blended together to create a complex smell that was both nauseating and exciting.

After a long while, Stardust slowly raised her head. Her face was covered in sweat, her hair clung to her cheeks, and a trace of clear saliva lingered at the corner of her mouth. But her eyes were bright, clear, and filled with contentment.

"How was it?" she asked softly, her fingers gently tracing patterns on Yuuma's chest. "How did it feel to make love with the class monitor?"

Yuuma looked at her, at that pure and gentle face that belonged to Onodera Aoi, but her eyes held the possessive and controlling gaze of Stardust. This contrast gave him a strange sense of excitement.

“Very…very good…” he said softly.

Stardust smiled. She propped herself up and sat on Yuuma's lap. Mixed fluids flowed from her vagina, running down her thighs and leaving new stains on her black pantyhose.

“That’s good,” she said, gently stroking her lower abdomen with her fingers. “Your semen… is all in here now. Warmly resting in the class monitor’s uterus.”

She paused, looking at Yuuma.

“You know what?” she said softly, “I can control everything about this body. Including… keeping the uterus in the best condition for fertilization. If you want… I really can get the class monitor pregnant with your child.”

Yuzhen was stunned. He looked at Xingchen, at that innocent face, at those alluring eyes.

“However…” Stardust smiled, “it’s too early now. We have plenty of time… lots and lots of time.”

She slowly got off Yuzhen and stood by the bed. Her legs were trembling slightly from the intense sex, and her knees, encased in black pantyhose, felt weak. She bent down to pick up her clothes from the floor, but didn't put them on immediately. Instead, she took the stained clothes and walked to the sink in the infirmary.

The sink was old, its white ceramic surface stained with yellow watermarks and black mold. The faucet was rusty and made a screeching sound when turned on. The water flow was weak and had a rusty reddish tinge.

Stardust turned on the tap and began to wash her body. But she washed very casually—she only rinsed her face and hands with cold water, barely dealing with the mixture of semen, vaginal fluid, dirt, and slime on her body.

She looked at herself in the mirror—the face that belonged to Aoi Onodera, now covered in sweat and mucus, her hair disheveled, her eyes glazed. Her black pantyhose, bra, and thong were stained with filth, making her look like a cheap prostitute.

But she smiled.

It was a satisfied, triumphant smile.

She turned and walked back to the bedside to get dressed. But she dressed very casually—the shirt was only buttoned up haphazardly, revealing large areas of her chest and abdomen, which were covered in sticky mucus and dust; her bra was not adjusted, and one of the straps had slipped down to her arm; although the skirt was zipped up, it was not fully closed, and the side opening revealed a small part of her buttocks.

Worst of all was her pantyhose—instead of taking them off, she put her shoes on directly. The loafers were spotless, but the soles were stained with grime from the infirmary floor. When she put them on, that grime from the soles came into direct contact with the bottom of her pantyhose, making the already filthy soles even dirtier.

"It's time to go," Stardust said, her voice regaining its gentle tone typical of a class monitor. "It's getting late, and if we don't go back soon... people will get suspicious."

She walked up to Yuzhen and gently stroked his cheek.

"I had a great day," she said with a smile. "Studying with Yu-chan, and...making love with him."

Her fingers slid from Yuzhen's cheek to her lips and pressed gently.

“Remember this,” she said, her voice soft but clear, “Class president Onodera Aoi… is mine too. Just like Sato Misaki, just like Suzuki Ayako… they are all mine.”

She paused, looking at Yuuma.

“And you…” she said, “are mine. Forever.”

She leaned down and gently kissed Yuzhen's lips. The kiss was brief, but Yuzhen could taste the lingering semen in her mouth, along with that unique, slightly humus-like, sticky flavor.

Then she straightened up, turned and left. As she reached the door, she turned back and smiled at Yuuma.

"See you tomorrow, Yuzuru-kun," she said, her voice as gentle as a real class president's. "Remember... to keep it a secret."

She pushed open the door and went out. The door closed slowly, leaving Yuzhen alone lying on the dirty bed.

Yuuma lay there, staring at the ceiling. He could smell the complex odors in the air, feel the sticky liquid on his body, and see the dirty stains on the sheets.

He knew that from today onwards, class monitor Onodera Aoi... would no longer be the same class monitor.

Stardust has seized another identity, taken control of another body, and gained yet another way to get close to him.

He was already deeply involved and unable to extricate himself.

He closed his eyes and took a deep breath.

Then he laughed.

It was a tired, helpless smile, but also with a hint of... expectation.

He knew this was wrong.

But he also knew that he could never go back.

We can never go back.