Chapter Text
Miyabi floated on her back, staring up at the starry night sky. She had snuck into her school after hours to use the pool alone, or do anything to keep her away from her house for as long as possible. It was pitch black all around her.
A meteor streaked across the sky before exploding with a loud bang over her city. She mindlessly watched the falling debris burn up in the atmosphere. She heard a plop, like a stone had fallen into the water.
Might be nice to find a piece of meteorite, she thought idly.
Her attention soon drifted back to nowhere.
She felt something brush against her leg and jerked her body backwards in the water, paddling furiously as she looked around, but she couldn't see anything. It was probably her imagination, but she felt too creeped out to stay in the pool any longer and climbed out.
Miyabi headed into her changing rooms and turned on the light switch. As she did, she saw it.
A bright red, pulsing phallic object, almost like a tentacle or slug, clung to her navy blue school swimsuit.
“Kyaaaaa!"
Miyabi screamed and swung her arms at the mysterious lump. The creature scurried out of the way towards her leg. As she tried to grab it, tentacles shot out of the creature and tied her arms to the upper frame of a bathroom stall. She thrashed futilely and looked on in horror at the mirror on the wall, directly across from her and giving her a full view of everything going on.
The creature had sprouted several tentacles several times its original mass, and pulled her legs apart as she struggled. A tentacle yanked the crotch of her swimsuit out of the way to expose her vagina.
Sheer freezing terror crept up her spine.
"No way, no,” Miyabi whimpered half in denial.
The slug-like creature pulled itself closer to her crotch and tiny feelers sprouted out of it to caress her lower lips.
Miyabi shrieked and screamed but was suddenly cut off by a tentacle that had crawled up behind her and wrapped itself around her throat. The large glistening appendage hovered in front of her face as if staring at her then dove straight into her mouth. It thrashed around the inside of her mouth a few times, battling with her tongue, before pushing its way down her throat. A wet and sticky mucus coated her insides. She tried to scream again but only muffled sounds came out. The vile liquid disgusted her and made her gag. As she drank it, her body felt hotter and hotter and her nipples tingled.
She watched in horror at the mirror as the main body of the slug pushed up against her vagina. It pulled back a bit, then rammed itself up inside her. Pain cut through her mind as her hymen was torn apart. The slug pulled out again before diving into her once more. Her stomach hurt from the impact. The creature pistoned in and out furiously, making her feel like her body was being torn apart.
Slowly, somehow, the pain turned into pleasure. Her hips buckled as she unconsciously tried to give herself over to her master.
The bitter and disgusting mucus that had repulsed her so much started to taste sweet.
Miyabi let out a low moan and couldn't believe herself.
What the hell was she doing?
It was her worst nightmare.
But her body betrayed her.
Her body buckled and swayed against the stall frame and the creature pumped itself more and more vigorously into her. Tiny tendrils wiggled into her ears, and a mysterious high clouded over her mind. As her body crept closer and closer to an orgasm, the slug crawled deeper into her until it knocked against her womb.
Pain and pleasure ripped through her body and mind as the deepest parts of her were invaded, and she passed out.
“Miyabi?"
“Aaah!" Miyabi screamed and her head shot up from her desk. Her best friend Yua, who had been shaking her shoulder, stepped back in surprise. Miyabi scrambled backwards, turning her head furiously around, before realizing that she was in her classroom. She looked down at her body. Instead of being wrapped up in tentacles, she was wearing her usual plaid uniform.
The other students in the class laughed at her shock, and even Yua giggled a bit.
“Did you go sneaking around late at night again?" Yua whispered, a conspiratorial smile on her face. Her face looked really cute when framed by her shoulder-length yellow hair.
Miyabi vaguely nodded her head and brushed back her long messy black hair.
"You should try to get more rest, you know.” Yua sat down in her chair next to Miyabi’s and scooted over with her lunch box.
"I should…" Miyabi muttered.
Was it all just a nightmare? It felt so real.
Miyabi sighed in relief and held a hand to her chest to calm herself down.
Inside her womb, the parasite clung to her walls, slowly reworking her body. Her flesh was melted and recreated. Her immune system fought relentlessly against the pathogens spreading through her body. The parasite analyzed her nerve cells, observed her nervous system, and prepared to integrate itself.
A few days later, Miyabi noticed something as she took a shower. On her navel, between her crotch and her belly button, was a faint pink pattern. The swirling lines almost seemed like a heart. When she ran her fingers over it, a streak of arousal shot up her spine. She closed her eyes and shivered. A moan escaped her lips as her body heated up. She shook her head to will it away, and continued washing the rest of her body.
As she dried herself off and looked in the mirror, she thought that her breasts seemed swollen. She looked down at her chest and brought her hands up to cup her boobs. She wasn't sure if it was just wishful thinking, but she thought her breasts might've been a little bigger.
Her nipples had puffed up and stuck out a lot more than before, and looked brighter and almost reddish. Her areolas were also more prominent.
Seeing her body’s slight changes turned her on and she got excited. She quickly changed and went back to her bedroom, then immediately locked the door. Straining her ears to check if any of her family were nearby, she climbed onto her bed and lay back with her legs spread.
She threw off her shirt and squeezed her breasts. Pleasure ran over her like a tidal wave, in a way that her breasts had never given her before. She arched her back and moaned as she kept massaging and kneading them. Her fingers moved up to her nipples, and she squealed when she pinched them. They begged to be pulled, so she gripped each nipple between her thumb and index finger and yanked on them back and forth.
Her hips buckled and her vagina clenched itself open and close as the orgasm rocked through her body and milk shot out of her nipples. Miyabi was shocked at the sight, but somehow, instead of freaking out or stopping, her body seemed to automatically scoop up all the milk she could onto her fingers and pour it into her mouth. She stuck her hands into her mouth and licked and sucked on her fingers to get as much as she could. Her freshly made milk tasted sweet and sent little waves of pleasure up to her brain.
More.
I want to drink more.
She collapsed back onto the bed, and quickly fell asleep from the exhaustion. That night, her dreams were filled with thoughts about breasts. Having breasts large enough that she could suck on her nipples directly. Breastfeeding her friend Yua. Tying Yua up with tentacles and forcibly milking her…
Her shirt was soaked with milk when she woke up. Mysteriously, so were her shorts. A sweet, cloying smell hung in the room, making her mind hazy and horny.
Miyabi held her shirt up to her mouth, and idly sucked on it… until she saw that she had overslept her alarm. She sprung out of bed in a panic, and wiped the remnants of milk off of herself in the bathroom. She managed to force her boobs and puffy nipples - both of which seemed larger than the previous night - into her bra, but it was uncomfortably tight and her cleavage looked like it was bursting. She put on her uniform consisting of a sailor blouse, bow, and plaid skirt, then left her house.
As she ran towards her school, a voice called out to her from behind.
“Miyabi!" It was Yua. Yua ran up to her, then paused.
Were Miyabi's boobs always this big?, thought Yua. She had felt that there was something off about her friend lately, but wasn't sure what.
"Hey Yua.” Miyabi turned and smiled at her friend.
Yua gulped. Somehow Miyabi's smile had a sexy and erotic undertone to it, and she felt like she was being pulled in.
Miyabi's stomach growled.
“Hungry?" Yua giggled.
“Very, I woke up late and didn't get to eat," Miyabi whined and clung onto Yua’s shoulder. A hazy thought crossed her mind. “Hey Yua… can I eat you?”
"Huh?!”
Miyabi eyed Yua's glistening neck. "Your sweat smells so tasty…"
Unbeknownst to both of them, Miyabi’s scent and breath were releasing a lot of pheromones, and Yua's mind was unable to register anything wrong with Miyabi's words.
Yua breathed heavily and pulled down her shirt collar. “Go… go ahead…"
Miyabi pushed Yua against a wall on the street and lapped her long tongue up Yua's neck. She licked at all the sweat on Yua's chest and neck, then wrapped her lips around Yua's neck and sucked heavily. Yua gasped and stumbled, one leg pulling back behind the other.
Miyabi immediately mounted her crotch onto Yua's thigh and humped her as she bit into Yua's neck. A small dose of the parasite pathogens inside her infected Yua as Miyabi ground her enlarged clit against Yua’s leg. Their breasts squished against each other. Miyabi hugged Yua tightly and moaned as she came, her pussy juices trickling down Yua's leg.
They panted and leaned against the wall. Passersby raised their eyebrows at the pair of girls hugging each other and leaning against a wall on a random street, but the girls themselves were too unfocused to care. Eventually they returned to themselves, and made their way to school.
Neither of them had perceived that anything weird happened.
They drew a lot of attention from the other students during the day. Yua had a large love mark on her neck, and lots of people were speculating about her relationship with Miyabi. As for Miyabi, the combination of her body's changes and the pheromones that she unconsciously emitted made guys and girls alike turn their heads to stare at her.
Miyabi had a hard time concentrating during her classes. Her mind kept flashing back to that morning, and how good Yua's sweat tasted. She wanted to bite and devour more of her. As she thought of how she had humped Yua's thigh with her crotch, her panties started to feel tight. Somehow her clit was straining against the fabric. Maybe it had expanded further. She slightly buckled her hips in her chair, hoping that no one else would notice, as she ground her clit against her own underwear. Her breath came out short and ragged as heat flowed through her body. Her tongue rolled out of the side of her mouth.
Beside her, Yua kept glancing to see Miyabi's reactions, and she herself got turned on and blushed.
As Miyabi panted out her hot breath, her pheromones slowly diffused through the classroom. Soon it was like a hot haze clung over everyone's minds as their bodies unconsciously reacted to the chemicals. Everyone was surprised and confused to find themselves aroused for no apparent reason.
Feeling bolder and with her judgement clouded by how horny she was, Miyabi discreetly used her pen to poke and rub at her clit and vagina. She thrust her hips against the pen and brought herself to another orgasm, the waves crashing over her as she tried to stifle her moans.
She had no idea what any of her classes had been about.
Around lunch time, her breasts felt wet and she realized that she was lactating again. She stood up in a hurry and ran out of the room, and Yua quickly followed after her.
“Miyabi!"
Miyabi covered her boobs with her arms and turned to look at her friend. “What is it? I kind of need to go deal with something right now…"
Yua's eyelids dropped down with sadness. “You've been acting weird lately. Is something troubling you?"
“Well…"
“I want to be able to help you."
Miyabi rolled in her lips. She had no idea how to explain to Yua what was going on with her body when she herself had no idea either. And Yua might not even believe her, or be disgusted at her.
But then her dreams from the previous night flashed up again.
Dreams about breastfeeding Yua.
Miyabi grabbed Yua's hand and pulled her towards the deserted emergency staircase at the back of the school that they often hung out at. When they were alone, they turned to face each other.
"So uh, Yua.” Miyabi stammered. "I don't know why, but lately my body's been… getting weird… and it's giving me a lot of problems."
Yua nodded carefully. “You seem different. What problems do you have? Can I help you with them?"
Miyabi's heart jumped up to her throat. Maybe she really would get her desire. She turned her head to the side, tried to make herself look as embarrassed and vulnerable as she could, and held up shivering hands to her blouse. With trembling fingers, she detached her bow and undid the top buttons. She noticed Yua's eyes growing bigger and her cheeks turning red as she saw more and more of Miyabi's bursting cleavage. Feeling emboldened, Miyabi pulled her blouse to the side, unclasped her bra and pulled them down off her chest.
Her large nipples strained against the bra for a bit before coming loose, causing her full breasts to bounce up and jiggle. Bits of milk sprayed into the air.
The pheromones in her milk seeped into both of their minds.
Yua gasped and stared at her nipples.
“I've been lactating a lot," said Miyabi. “It gets everywhere, so… could you help me get rid of it?" She looked up at Yua with puppy eyes.
Yua, as if in a trance, nodded and slowly bent down to Miyabi’s chest. She cupped her palms beneath Miyabi's breasts, feeling the hefty weight of them, and the milk sloshing around inside. She gave a light squeeze. Heat spread out through her body as her heartbeat skyrocketed. Miyabi's, her precious friend’s, beautiful boobs were right in front of her. The long puffy nipples were so alluring. She leaned in and sucked on one. The explosion of milk in her mouth delighted her and she felt hooked, furiously sucking for more.
Miyabi's heart filled with joy as Yua sucked on her tit. The feeling of the warmth swirling inside her breasts being transferred over to her friend was incredible. The knowledge that her very own essence was being eaten and absorbed by her friend brought her to an indescribable high. She hugged Yua and wrapped an arm behind her head, pulling her in closer. They backed into the corner and leaned against the wall in a reverse of that morning’s position. Miyabi slowly slid herself down and guided Yua, until she was sitting comfortably in her corner and Yua was lying on her lap and suckling like a baby.
Miyabi felt pleasure and love float inside her as she warmly stroked Yua's hair. This was their little heaven. She wanted to be with Yua like this forever. Her right breast was still free and leaking milk, and she gently massaged it herself and brought the milk in her palm up to her lips. It was sweet and filling.
The door to the emergency staircase opened and a boy walked in. Yua didn't stop sucking. She only turned to glare at the intruder who might take away her meal.
Miyabi panicked, then realized it was Kei. Kei was a cute kouhai who often hung out with them as a group, and Miyabi was pretty sure that he had a crush on her. They were fond of Kei, but it was a shame that he was a boy. Kei would be so much better as a girl.
Kei held his hands up to cover his face and looked through his fingers. “I'm sorry! I-I didn't mean to interrupt, I'll leave you two alone.”
Miyabi stared at Kei’s cute face.
It really is such a shame that he’s a boy. He should be a girl. I would like him more if he was a girl, and he would be so cute too.
I want to turn him into a girl.
Maybe… maybe I can.
If I make him drink enough of my milk, I could turn him into ‘her’.
Miyabi didn't know where the thought came from, but she was oddly certain of it.
She held up an inviting hand and smiled. “Come here, Kei. There's another spot for you."
Kei’s heart went into overdrive. The beautiful senpai that he was in love with had just invited him to suck on her breast. A part of him was worried about the modesty and morality of the situation, but it was entirely killed off by the lust pheromones drifting in the air.
Kei slowly lay down on Miyabi's lap and curled his body up into a pile, mirroring Yua. He gently held Miyabi's right breast. “Is it really okay?"
“Of course. As a matter of fact, I need to get myself to stop lactating before class, so you would be helping me out."
Kei gulped. “I love you, Miyabi-senpai." He brought his lips to Miyabi's nipples and sucked. The sweet milk in his mouth was so good that it made him cry. Hormones and parasites poured into his stomach, ready to rework him.
Miyabi tilted her head back and moaned at the doubled sensation of breastfeeding on both sides. Her happiness was like floating in a sky of warm and fluffy clouds. She stroked the hair of her two partners and kissed the top of their heads.
They were so absorbed that they missed the next class.