Aya is a simple girl who attends high school. She was never one to excel at anything, but for her it was better that way. At the beginning of her senior year, slowly and gradually, she started to pay more attention to people with more interest in their bodies, regardless of whether they were male or female. She eventually realized this, but didn't see it as a problem.
In another apparently normal day, Aya attended a monotonous history class, and instead of paying attention to class she kept an eye on her teacher, who had a young appearance for her age. She was undressing her teacher in her mind, which excited her, when she felt a rapidly building pressure on the back of her jeans.
Reacting to the strong pressure, Aya looked back and saw something above her ass growing and forcing the fabric, which did not resist the pressure and was torn. A tail stretched out behind her quickly becoming long enough to graze the legs of the girl who sat in the seat behind her. The girl felt movement between her legs and looked down, squealing after seeing Aya's tail and drawing the attention of the rest of the class, who also saw it.
Aya was scared, embarrassed and, she hated to admit it, very horny. She looked at the class facing her and barely noticed when the tip of her ass inflated into a sphere and a pussy appeared there.
"What's going on here?" Mrs Mitchel, the history teacher, questioned the reason for the commotion.
"Aya grew a tail." a guy who sat next to Aya said to the teacher
"There's something wrong with me, I..." Aya was saying when she felt pressure from her sides and her blouse was stretched on both sides, then being torn apart creating passage for a second pair of arms that grew just below the original.
"Quick, someone take Miss Aya to the infirmary immediately." Mrs Mitchel said, but no one moved as they were scared. Aya kept changing, now with her breasts bursting through her bra as they exploded in size, each one reaching the size of her head, apart from the second pair that grew just below reaching the same size. At the same time her shoe was forced off her feet, which grew larger now containing three long toes with claws. Her leg joints also completely reversed.
Mrs Mitchel, disgusted that no one took action, decided to accompany Aya to the infirmary herself and held the girl by her upper right arm, but the student doubled over when she felt a strong pain between her legs and lowered what was left of her arm. Her jeans, which was hurting the way they tightened the ballsack that had replaced her vagina and was still growing. Two bumps appeared just above her balls and elongated, the skin opening at the tip of her new pair of cocks, which grew hard until they reached 11 inches in length.
Aya was scared and desperate, so she didn't wait any longer and ran out of the room without looking where she was going. She couldn't run properly with the new configuration of her legs, and to help her steps make a lot of noise, which attracted many onlookers who came out of their own classes to see what was going on. To make matters worse, she noticed that her entire body was growing.
With no choice she ran to the infirmary. When Aya got there she saw that the nurse wasn't there and she would have to wait.
Now that she was alone, Aya analyzed in more detail what had happened to her. She was now 8 feet tall, had 4 arms, 4 breasts, legs that resembled those of a tyrannosaurus, except for the size and lack of scales, a tail which she only now noticed the rounded part that had a pussy in its tip, and the her dicks, now 14 inches, with balls the size of volleyballs.
She thought it was ridiculous that she had gone through such a transformation all of a sudden, and even worse that she was feeling very horny in spite of everything. She then decided that while she was waiting for the nurse to arrive, she would have to sort this out, as she didn't want the nurse to see her with her dicks hard when she arrived.
Aya then started stroking her dicks with her lower hands, with her upper hands she cupped her breasts and teased her nipples, and she lifted her tail putting the tip in front of her face and thus started using her tongue to stimulate her own pussy. It felt so good and once she started she didn't want to stop.
Aya was enjoying the moment so much that she forgot where she was and got scared, because when she was reaching her limit, the door opened and the nurse came in accompanied by Mrs Mitchel. Aya was embarrassed and tried to apologize, but it was too late to take it back and she came. Load after load of cum gushed from her cocks, onto the floor in a puddle. She couldn't deny that it was the most intense orgasm she'd ever had, but it was also the worst time for it.
"I'm so sorry, I couldn't resist." Aya said with an expression that mixed shame, fear and bliss.
"You just saw how I wasn't. She turned into that during my class." Mrs Mitchel said to the nurse, Mrs Hart
"Me, I've never heard of anything like it before. Even seeing it I still have trouble believing it." Mrs Hart said
Aya, now that her orgasm had passed and she felt satisfied, she started feeling weird again. "Oh no, I think... I think I'm changing again." she said and, in front of the teacher and the nurse, she shrunk, all her new assets absorbed into her body, feet and legs returning to normal. In the end she was completely back to normal, as if nothing had happened.
"This is so crazy, it feels like I'm watching a sci-fi movie from within the movie." Sra Hart said
"What happened with me? Why did this happen to me?" Aya asked
"I'm sorry, but I don't have the slightest idea. I can't do anything to help, we're going to have to send you to a hospital for more detailed tests." Mrs Hart said
"You contact the hospital and I'll call her parents to let them know what happened." Mrs Mitchel said and hurried out of the ward.