Patrick was selected as the Patient Zero of the virus, and was destined to determine the planet’s future. He was with friends at a large county fair trying out the various games and trying to beat them. Patrick was a very scrawny boy with spiky blonde hair and grayish blue eyes, and was a great pitcher for the school baseball team. He hurled the baseball square at the knockdown clowns’ faces, and actually managed to topple them, much to the chagrin of the carnie manning the the game. But fair was fair, and for winning he got a huge stuffed animal.
“Nice one, Patrick,” one of his friends Janet gave him a high-five, “That game is notoriously rigged! You just did the impossible!” Janet was a bit on the chubby curvy side with long chocolate hair and circle rim glasses, and was a straight-A student. She and Patrick had been friends for years before then, and were almost like siblings by then.
“Aww it was no trouble,” Patrick shrugged, “Coach has had me do so many goddamn pitching drills that now I bet this arm could knock out a giant with one throw. Not that I’m boasting or anything.”
“Sure you’re not,” Janet smirked, “you pitching machine, you! So that’s one game down. What next? Ring toss? Funnel cake? Those love birds Meg and Andy are probably hanging out in the house of mirrors if you want to find them.”
“I think we should...” Patrick pondered when suddenly a bolt of green lightning struck him in the head. He froze right on the spot in shock more than anything, dropping his prize onto the grass.
“HOLY SHIT! Patrick?” Janet squealed, “You okay?”
“Y-yeah? I think I’m... fine?” Patrick came out of his shock only to start clutching at his throat. “What in the... I... I sound like a girl! My voice! I sound like a girl!” His body started sprouting thick, fluffy fur as it started to bloat with piles and piles of fatty tissue, shredding his clothes to pieces. His face stretched out into a golden retriever’s snout as his ears migrated to the top of his head and became longer and floppier. The fat on his chest piled on heavily until he had heaving breasts that rested on the yoga ball boulder of a stomach he had. As a fluffy tail extended from his spine, his ass and thighs became thick enough to swallow a love seat, and his feet started turning into paws complete with pads. Then, the final part of the transformation set in as two more heads grew in on either side of his face, each an exact replica of the original. When the changes finally subsided, Patrick had become a naked, obese three headed golden retriever who looked and sounded like a girl.
“P-Patrick?” Janet asked in her own state of shock, “Are... are you okay?”
“I don’t know,” all three heads answered at once, “Everything’s spinning... it’s... so... hot... everything... is... burning...” The fat Cerberus Patrick fell over onto his(her?) back as something crazy started happening to him(her?). Patrick’s body was having an orgasm for no reason as his dick started spraying roiling hot spunk all over the place. His eyes rolled into the back of his heads and he lost all awareness of his surroundings as he shrieked like a banshee. This went on for a full minute until he ran out of semen, and his fattened cock hung limp.
Patrick started regaining their senses, feeling their three minds change and develop as they stood up. Patrick now thought of herself as a woman despite having a dick and balls instead of a vagina. The three heads started thinking for themselves and were able to share thoughts with each other. They were now perfectly happy with their body’s form, and were more worried about what was going on around them. Also about being naked. They’d have to find something to wear later.