Jen placed the pill back into her mouth, and took a sip of water. To her surprise, it had a pleasant flavor, similar to melon. A warm feeling spread from her abdomen, and she felt time slow around her while her changes began.
The first thing to change was her feet. Her shoes soon felt uncomfortably tight, as her legs shifted into the digitigrade legs of a dog. She quickly kicked her shoes and socks off her longer canine feet, watching as fur began to spread up her legs. As it reached her hips, she felt her genitals morph, her human vagina replaced by a huge, bulging horsecock sheath. She shivered as her ovaries grew to the size of softballs and shifted, falling heavily into her newly formed ballsack. Her spine tingled as a long dog tail grew above her ass.
Her breasts expanded in both size and number as the fur continued to grow up her torso. Her original pair stretched her t shirt to its limits as they grew to P-cups, almost unnaturally round and plump despite their weight. Three more pairs grew down her torso, decreasing in size, though her bottom pair was still a hefty pair of I cups. The 4 pairs of huge tits were crammed on her torso, causing her new horsecock's sheath to be completely hidden between them. They spilled over her thighs, filling her lap.
The fur now spread down her arms, unchanged except that her hands were now incredibly paw-like. The most drastic changes were yet to come, as the itchy though pleasurable sensation creeped up her neck. Her ears shifted to the top of her head, and her hearing improved dramatically. She watched in amazement as her face pulled out into a canine muzzle, her new nose picking up on scents she had no idea existed. She could smell the cafeteria down the hall, each of her classmates, the meat Claire was chewing, and even hints of someone having 'fun' in the bathroom down the hall. However, the changes weren't done yet. She felt her muzzle shift, splitting down the middle. It quickly separated into two identical muzzles, and a third eye grew between them. She soon realized she couldn't see out of it, though, as her vision remained split between one muzzle and the other, giving her an incredibly wide field of view.
She felt herself began to pant with two oversized tongues as she zoned back in, returning to reality as a massively busty dog girl with two muzzles. She reached into her backpack and pulled out a spare hoodie, as her shirt had been completely destroyed, but found it nearly impossible to reach around her gigantic tits, squishing them up onto her muzzles as she struggled to zip her hoodie up.
"You ok, girl?" Claire asked, watching her friend try and fail to squeeze into her hoodie.
"Y-yeah! Just... one... sec..." Jen huffed out of her left muzzle as she pulled her hoodie closed, feeling the pressure as her eight huge boobs pressed against her torso, the hoodie, and themselves in a futile war for space. It didn't help that she was being turned on by wrangling herself into her hoodie. She felt her horsecock stir, completely hidden between her breasts. She blushed as it hardened fully, though no one else could tell. Every little movement caused her soft, firm breasts to rub against her rock-hard 2 foot long horsecock.
"You sure?" Claire asked coyly, as her classmate struggled to contain her mixture of embarrassment and horniness, her tail wagging like no tomorrow. Jen wasn't sure; she couldn't focus on the lecture while titfucking herself with this raging boner, that was for sure, but there was no way for her to get any release here. She tried to put up with it, but every little movement causes her boobs to shift, rubbing against her raging boner. Writing notes was impossible, since she was turned on even more by reaching around her massive chest just to reach her notebook, not to mention how they squished when she leaned forward. Her tail wagged, and her tongues slipped from her muzzles as she began to get warmer. She felt them brush against her chest, beginning to drip saliva onto her hoodie. She closed her eyes, engrossed in the feelings, her notes trailing off...
Just then the bell rang. Jen jumped, feeling some pre-cum leak between her boobs from the shock. She tried to get up, blushing with pleasure as every movement caused her breasts to jiggle, rubbing against themselves and squeezing her cock. When she finally managed to get up, she immediately felt her boobs win the space war against her hoodie, the zipper bursting open. Jen groaned, her horsecock still hidden in her massive chest, as she realized her predicament through the haze of pleasure.
"What the hell am I going to do with you all..." she said quietly to herself, looking at them over her muzzles with her two spaced-out eyes.