Mary's eyes widened in terror as she read the description of the vial: "Werepegasus (Stallion)" it read, "Changes the subject into a male Werepegasus, female subjects who drink it will change genders during the transformations, WARNING : If a female subject drinks it, they will become a Werepegasus after five minutes, but WILL keep transforming into a Werepegasus on every full moon. The effects are permanent and can't be cured."
Mary was scared, she just doomed her favorite teacher to become a male Werepegasus for the rest of her life, but atleast this would be some form of payback for some of the bad grades she was given.
After a while, the class was being filled with Mary's fellow class mates. At this, Mary quickly hid the vial.
"Good morning class!" Exclaimed Miss Ethel with her enthusiastic voice, "I hope you bringed your presentations, and if not, you know where I want them to be next week." said Ethel as she pointed at the trashcan, resulting in a few giggles from her students. "So, who wants to start?" Asked Ethel as she looked around the class seeing multiple hands raised, while also drinking the last bits of coffee in her mug, and unknowingly, the vials. "Daniel would you like to start?" Asked Ethel, being quickly replied with a nod from Daniel, who went towards her desk with his papers.
Mary gulped silently as she thought of the potential consequences, she might get Miss Ethel banned from the school for becoming a freak, or even terrorizing her students, while Daniel was reading his presentation about witchcraft, Mary looked at the clock, five minutes have already passed! She looked at Miss Ethel in panic as she saw Ethel giving a pained expression while seemingly sweating.
"Miss, are you okay?" Asked Daniel as he looked at his teacher with a worried look.
"I'm fine, I didn't sleep so well last night, go on." Replied Ethel, as Daniel continued his presentation, failling to notice the slight tent in her dress and her ears, which grew longer and pointed, with black fur developing from the tip.
Shortly after, Miss Ethel's hair changed color into a deep black and grew, resembling a mane, with her new ears poking through. Her muscles also got stronger and grew, slightly ripping her dress, some of the students quickly left the class room, while others remained shocked, looking at Ethel's transformation, such as Daniel who stopped his presentation.
Miss Ethel groaned as she got up, destroying a small part of her dress, revealing two bumps, one in the area of her crotch, and the other one in her tailbone. A loud ripping sound came from Ethel's back as a long beautiful black tail came out from her panties, while most of the students stared at the tenting in the area of her crotch, other students stared at her shoes, which were destroyed and revealing that her feet morphed into hoves. Her legs bulked up as black fur traveled up, slowly reaching her crotch.
Her ass suddenly expanded as it fully ripped her panties, revealing that she developed a male member along with a pair of apple sized testicles, perfectly built for a stallion, confirming that Ethel shouldn't be called a "she" anymore.
The black fur traveled up to his chest, ripping the rest of the dress and revealing that his breasts disappeared, leaving Ethel with a pair of pectorals and a six pack, Ethel groaned in a slightly deeper voice as a pair of feathery obsidian black wings bursted from his back.
The fur traveled up to his neck and quickly changed Ethel's vocal cords, to sound more masculine in the process. His eyes changed colors and became slightly more equine, his face pushed into a snout as his teeth became more equine, and his nose melted into his now fully formed snout.
The transformation was now complete, Ethel stood up, now a beautiful 8'2 male black Werepegasus, with a body that almost catched the hearts of every girl in the class.
Ethel looked at Daniel, "Did you finish your presentation?" he asked with his masculine voice.
"N-No sir." Answered Daniel.
"Then i'll listen next time, there's no time." Said Ethel as he looked at the clock, "However, I want to know who's responsible for this." Said Ethel, as he flexed one of his arms, this caused Mary to shudder a little.