Zoey Mason was anxiously awaiting her lab work. It started with her sleeping in. Then during lunch, she ate so much that she vomited. The final clues were the labored breathing afterward and a slight fever. She then drove out of the park and to the nearest hospital. It was quite small but able to help the tiny town of Woodsworth. She lived in a cabin at the edge of the park. The move here from Chicago seven months ago had been difficult but she wanted to protect nature's beauty. Although that may soon be over given her sickness. A man in a doctor's outfit and clipboard opened the door. Stepping inside he confirmed her fears. "I'm afraid miss mason you do indeed have the monster virus," he said. "so what does this mean? will I have to go somewhere?" Zoey asked. She hoped no. "That will be for your employer to decide. You'll have about a month before the changes become apparent. As for what you'll be transforming into well... it's hard to say. If this were a hospital in a major city then we would have a machine capable of figuring that out. However, all we can do here is confirm the virus in your system" he said. The two talked for some time about anything she needed to know. The forty-year-old woman then got in her car and drove home.
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The drive home was filled with worry about the call she would have to make. Once she got to her house she opened her front door. Going straight to the phone she called Mr. Jones. "hello? Who is this?" the man's old age was audible in his voice. "Mr. Jones, it's Zoey. I'm sorry to call but I... have to tell you something" Zoey held back tears as she explained the monster virus. To her surprise, Mr. Jones gave a weak chuckle. "it's okay Zoey my dear. Take this from an old man, not all life is tragic. Besides I would prefer to get this virus myself. If it could get me away from death's door for a few more years then I'd happily trade my grey hair and cane" Mr. Jones's kindness and eccentric behavior did not shock Zoey. She had met the man right after becoming a ranger. She was only in her twenties then but he was already forty years older than her then. His words helped calm her down. They decided that Zoey would choose whether or not she could continue her job after she changed.
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The following month was strange. It took a while for her to get used to the symptoms of the virus. Thankfully being in the woods allows you plenty of places to unload your lunch. She became more appreciative of the monsters that came through the park. She met a bodybuilder who became an anthro bear. "I can lift even more now," he said as he broke a log in two with his bare hands. He even made a joke about that. Next, a vampire told her the woe of her transformation "I used to be a vegetarian but now I need blood to sustain myself. Thankfully blood banks allow me to get my dose without biting necks" she said with an accent she claimed manifested after she changed. She had to leave before daybreak for obvious reasons. Then there was that pack of werewolves who rented out the largest campsite the woods had. The howling and campfire lasted through the night. When asked the group in their human forms explained she would understand soon. This had been the first time someone had figured out her situation. She then had to help a pair of nagas who got well... let's say knotted. The two apologized to Zoey and explained they had just changed a week ago and wanted to experience nature in their new bodies. One of the most interesting meetings was with a woman whose lower half was replaced with the body of a male tiger. "honestly I can't figure out why my upper body didn't at least become male. I mean at least that would make sense" she said. Her brother had insisted that a weekend in the woods would do her some good.
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The moment Zoey had woken up that morning she knew something was different. She woke up on time and ate a reasonable amount for breakfast. She lost her fever and didn't feel even a little bit nauseous. She checked her body for any signs she had changed but oddly found nothing out of the ordinary. Figuring the changes would begin in a bit Zoey decided to do her job until then. She looked at herself in the mirror. Her buttoned shirt and green pants still fit her. She hadn't even needed to tighten or loosen her belt. Her shoes still fit so there was nothing different there. Her long hair still fit beneath her hat. She gave one final smile before leaving. She had read about this and heard from the monsters that visited the park. It was the feeling that your body is different despite it looking like it's always done. Little did she know that wasn't the case at all. The reason she couldn't see the changes was because they were internal right now. Her glands and walls were shifting and mutating. Her uterus was merging with her clitoris. The eggs inside her became sperm as her ovaries began to descend slowly. Her new testicles were now at the edge of her pussy as it was sealed shut. This alerted Zoey to the building pressure on her crotch. Pulling her jeep over she undid her belt. Next, she unbuttoned and pulled down her zipper. She let out a gasp as she was her panties bulged. It wasn't long before her hairless sack popped out of the leg-holes and her growing cock peak out from its fabric prison. Zoey realized then that whatever she was becoming was male.