Serene felt a bit embarrassed wearing a collar, but she bought it for Halloween, and use it she shall! Her boyfriend bought it and the two intended to go to a kinky party as 'pet and master' though with Serene behaving as a dog. Her boyfriend didn't get any dog outfits which she thought weird, but she figured there were shipping problems and they couldn't get them to the couple right away. Whatever the case, she stood in the bathroom naked with the collar on. The collar was a black leather collar with a glowing jewel, which she thought either ran on a tiny battery or had a neat glow in the dark effect.

The dark skinned woman looked at her reflection with the collar. She felt a warmth inside of her, as well as an itch that grew around her skin. She rubbed her shoulders and frowned. 'Why didn't he send me any clothes with this collar anyways? And why am I so hot? God, am I getting sick?' Serene took a breath and covered her breast. She wondered what might go good with the collar, but the more she looked at the mirror and saw her face of concern, she wondered why she was even worried about putting on clothes to begin with. Dogs didn't wear clothes.

'Wait, dog? I'm not a dog...' The collar on her neck glowed faintly for a brief moment. She could almost feel... something push out of her ears, yet she saw nothing in her reflection on her head besides her dark hair, hair that looked oddly lighter than she remembered. She ran her fingers through her hair and spotted something strange on her scalp. She tilted her head down towards the mirror and moved in. Upon close inspection, she saw that some of her hair looked very pink. 'What?' She never remembered having pink highlights, especially at her scalp. The more she studied the pink hair, the more she began to see the hair wash its way down her black hair. She grabbed onto her head, as if in hopes to try to stop the spread of pink, but to no avail.

Serene immediately suspected the collar as the prime suspect for doing... whatever was happening to her. She reached down and tried to grab the collar, only to find that her fingers were transforming too! Her once thin delicate fingers were thickening with fur and fat, beginning to resemble large paws far more than regular fingers. She could still flex her digits, but she couldn't stick them in tight places, like the space between her collar and neck. She let out a whine that sounded much more canine than it did human.
'Scissors!'

Serene rushed out of the bathroom and into the living room. She tried to think about what she last used her scissors for, but she couldn't remember. She grabbed the side of her head as she tried to think, but thinking was so hard! Worse yet, as she held the sides of her head, she realized her ears had changed too. While her ears were still on the side of her head, they were... floppy and huge, much like the ears of a dog. She wondered just how fast she was changing, and if this could be reversed if she got the collar off. She pulled her hands back and felt a sharp claw scratch her as she did. A quick glance at her hands showed her thick stubby paws with a sharp black claw. Rather than use her claw to try to break her collar, she raced around the house in hopes of finding something sharp enough to cut her collar.

Serene's skin grew pale as white fur slowly sprouted all over her body, spreading from her furry paws and her pink hair along her arms, down her head, and then down her chest. She ran around the house so much that she grew even hotter, so much so that she opened her mouth and began to pant heavily. She couldn't think of where she left those scissors to remove the collar. In fact, it was getting hard to think about anything but... sex. Her tongue wasn't the only thing dripping from her. Her vagina grew hot and wet with need for something, anything, all while she was transforming.

Serene's ears flickered as they picked up the noise of a jingling from her neck while she rushed around the house. She looked down in an attempt to see her neck, but just saw two fuzzy white tits more than a few cup sizes larger than their original size, but she was barely concerned about that. She raised her neck and felt the collar. The once small thin leather collar had a new... soft feeling to it, as if it were silk. She thought it might be easier to pull off in its changed state, but it just jingled more as she yanked at the collar. She pondered why she was trying to remove this collar in the first place, and her thoughts just wandered more and more the jingling came from her new collar, one that had a very small bell on it.

'What was I so worried about again?' She thought. She looked down at her body and saw her pawed feet, and then her behind to see a tail just finish pushing out from her rear. What did she have to worry about? She was a puppy with a special collar and a cute boyfriend! Maybe she was worried the collar wasn't good enough, but after a jingle, she couldn't help but giggle. No, the collar was fine. She was just paranoid that she wasn't sexy enough. She'd show her boyfriend though! As the cute bimbo dog that she was, she was going to show him a good time!