The Best Costume

Story by Myu Dalimo on SoFurry

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A costume gets a little too real for a couple.

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Halloween costumes could be all sorts of silly, sexy, a person could be anything imaginable. Ryan and Jennifer just managed to get a hold of a massive horse outfit. The outfit was of a huge draft stallion, so big it required two people to operate it! One person worked the back and bent forward while the other stood up straight. The two agreed that Ryan would be in the front, and Jennifer in the back, all for a halloween party.

"And no rides!" Jennifer shouted as she set up the back of the horse outfit, as a reminder to Ryan.

"I remember." Ryan rolled his eyes with a smile. He held the front of the brown colored horse and stepped inside of it, able to see out of the eyes no problem. He stepped back so Jennifer could grab onto his rear through the hole, the hole that connected to Jennifer's front. "Grab on and let's try it out. I bet we'll look pretty realistic." Not that Jennifer would be able to see anything other than Ryan's rear, but he'd help her direct her walking around and know what was going on. The duo were boyfriend and girlfriend, close enough to be willing to do crazy things like this, and not having been together too long to be sick of one another's shenanigans, like wearing a large horse costume before a big party.

With a light sigh, the young woman reached out and stepped forward. She grabbed onto Ryan's rear and her suit's cloth touched up against Ryan's, sealing the two of them up. The suit they purchased was a high quality one that looked as if the seams sealed together the moment Jennifer touched Ryan's rear. She could see only darkness in the suit, which was rather surprising as she figured the suit wouldn't be of such a high quality that it would conceal everything inside, yet she really did see nothing, but she could feel Ryan's rear. "Okay!" She shouted from inside the suit. "Go tell me what we look like! Because I can't see a thing!"

"I'm surprised. The suit wasn't that expensive and it all feels like regular cheap halloween cloth held up by... heck if I know." Ryan began to step forward, but paused as the back of the suit held him back. "Okay, this might be tricky if you really can't see anything." His voice was muffled underneath the costume, just like Jennifer's was, but they could still hear each other well enough to communicate. "Left foot forward. Like, take a normal step. Then your right foot."

Jennifer continued to hold onto Ryan's rear and stepped forward. It felt strange stepping inside of the outfit while holding onto him. She could only move so far forward before she felt herself scrunch up against him, and she couldn't bend out of the suit either. She was a bit surprised at how she couldn't bend too far upwards or downwards. The first suit they experimented with was so cheap in quality that she popped the suit open the first step she took forward! The two had to be perfectly in sync for that suit to work at all, but this suit restrained her movements so much that her movements were restricted.

Ryan could tell when Jennifer stepped forward, and he stepped forward not a moment after. "There we go. We just take this one step after step after... you know where I'm going with this. Little by little, we'll make it to the mirror." Ryan waited for Jennifer to take a step, and then he took a step. He had to admit this suit was very impressive to keep the two of them together. Why, by the time they got to the bathroom, he almost felt as if the two were so much better in sync than they were with any other suit! "You want me to describe how we look to you? How about the smell?" He joked. "I can try to get all the five senses going if you want."

"Just describing how we look is fine." Jennifer replied with a roll of her eyes. She couldn't describe the feelings she had, but it really did feel as if they were more connected together this way than they had ever been before. She kept her arms wrapped around his body as she walked forward with those two rear legs. The suit required the two of them to take off their shoes and slip into the hooves, but she could hear the clip clopping of their feet as they arrived in the bathroom. "Assuming you can see well out of those eyes in the first place." She would be surprised if he really could, given how the suit was so thick that she couldn't see. Heck, she could barely breathe! If she had too many problems though, a quick yelling and slapping him would separate the two real quick.

Ryan could see surprisingly well out of the eyes of the suit. He could see so well that if he weren't mistaken it almost felt as if he weren't in a suit at all! He could still tell someone was holding his rear though, but he couldn't feel his clothing which he thought was a bit bizarre, but those were details Jennifer wouldn't care about. He glanced at himself in the mirror and spotted the large equine form that Jennifer and him wore. They looked like a large stallion from head to hoof, with even a tail in the back. "I'd say we could almost pass for a real horse." It was true, while they wore a cloth outfit, it was hard to tell it was cloth at all! He saw the barrel that connected them together and no seams between his part of the costume, and her own. The barrel was filled, as was the rear and legs. If he didn't know any better, he'd say they really were two people inside of a live horse. "It's amazing. I bet if we go down to the race track that we could get in that race no problem! Or maybe we can just go to the pasture and find a mare to mate with since you don't want anyone to ride you." He teased her.

"Yeah, good luck doing that. This suit doesn't even have a cock." Jennifer wanted to smack Ryan for such a comment, but she found herself unable to remove her arms from him, as if they were frozen in place. Darkness still surrounded her so she couldn't quite tell what was going on. "Ugh. You're lucky my hands fell asleep wrapped around you or I'd give you such a slap." She pushed her head forward in an attempt to headbutt his back, but she couldn't find his back as she thrust herself forward. "What the heck? Ryan? What the hell is going on here?"

"What are you talking about?" Ryan moved around to get a better look at himself in the costume. He didn't think about how the back hooves were moving seemingly on their own without him needing to instruct her to do it, he was just turning like a four legger naturally would. "You're the one in there. You should know what it's like in the outfit." He rolled his eyes as he kept looking over the costume. "I don't think there's too much left to see on the outside. We look really good. Now, let's head on outside and get to that party."

Jennifer heard the four hooves clip clop on the ground back to the carpet, but as she heard them, she had a terrifying realization. She wasn't even trying to move her legs at all. The back legs were seemingly moving on their own! She was surrounded by darkness, unable to move her own legs, or her arms. In fact, she had a pulling sensation, as if she were pulled back in the suit and feeling the bounciness of the back of the horse. "Something is going on in this fucking suit, Ryan. Open it up and let me see!" She began breathing heavily as her heart pounded. She thought maybe she was just going crazy and that the temperature of the suit, as well as the inability to see anything, was just putting her body into a state of panic. She just had to have him do something so she could see herself. She felt as if she were in the ass of the suit, and that couldn't have been true.

Ryan hated to try to reach out of the suit. Truth be, the suit really had no front way for him to even use his hands. He wanted to move his hands, only to find out that as he raised his 'hand', he raised a hoof instead. 'Huh?' He shook his head and tried it again with his other hand, only to raise his other hoof instead. It was as if his nerves were connected differently. He could feel his hands, but they felt like the hooves he was using in front of him, but he knew those should have been feet. "You're not kidding. Something really is wrong." Moreover, how were they going to get out of the house? He couldn't get his hand out of that suit, not that he even knew if he had any hands to speak of. He glanced back at the mirror, and his eyes grew wide. "Oh... shit." He noticed the horse's pupils blinked with his own. As he moved his eyes, the horse moved theirs. "This... this isn't a normal costume."

"You're just realizing this now?" Jennifer shouted. Her voice sounded as if it were in a different spot than the back of Ryan, but somewhere... closer to his crotch? She also felt a pushing sensation, as if someone were trying to shove her head into something, but she felt nothing except the pressure on her head. "Uhn... we're transforming. What the hell is happening to me?" She tried to move her head, but to no avail! She thought about using her arms and legs to try to pull her free from whatever it was that was grabbing her, but that also did nothing, as she had no arms or legs to free herself with.

Ryan couldn't see Jennifer underneath the outfit, but he could feel something wiggling in his crotch, a sensation that made him shiver and let out an equine nicker. "Uhn... what... what IS going on?" Ryan couldn't bend his head the right way to tell what was happening between his legs. He stumbled to look in the mirror, and through that mirror, he saw the crotch of the costume wiggle, as if something were trying to push out of it.

Jennifer spotted a light in the darkness. She continued to stretch and pull her body as she tried to reach the light, but it felt as if she were stretching her neck out to an unbelievable size as she did. Her body pulsed and throbbed the more she pushed herself out.

From the outside, Ryan could see the cock in the suit begin to extend and slowly unsheath. Two large black balls revealed themselves with a growing sheath, and then a cock that grew out of it, but the cock hadn't fully yet formed. The shaft was still missing the head that was buried deep within the cock, but it felt wonderful as that shaft pushed and worked itself out. He clopped one of his hooves on the ground in pleasure.

The tip of the shaft Ryan had slowly revealed itself not to be a normal flared cock head, but the head of Jennifer! Her hair was stuck inside the cock, but the rest of her head pulled itself out with a slow and steady groan. "Uhhhahn." She huffed. Once she came out of the shaft, she panted hard, almost akin to that of a dog. Her neck throbbed hard, and it took her a moment to gain her surroundings. Her head was much smaller than normal, and between the crotch of a horse. "What the hell? Where... why am I here? Ryan!"

"You're asking me like I know!" Jennifer's voice was higher pitched, but it was the location of Jennifer that threw Ryan off. He saw her head and hair pulled back inside the sheath. She looked as if her face was flatter and rounder, almost like the beginning of an equine cock head. Heck, she already was one from the neck down! He couldn't feel his hide, but he looked more like a full-fledged horse with every passing moment. He was hoping for a costume, not to actually transform into a real horse! Though he knew Jennifer was having those same thoughts, especially from where she was now. She was becoming his cock. "Can you move anything down there?"

Jennifer tried to move any part of the horse's body, but she only caused Ryan's cock to twitch. "Oh... oh no." A growing pressure inside of her told her that if she kept going, Jennifer was going to do something that she would deeply regret. Already the smell of Ryan's musk was growing strong, and it was her emitting that musk! "I-I can't babe. You have to find a way to get this costume off." She wasn't sure if there even was a way to remove the horse outfit anymore. She noticed Ryan blinking and moving the lips of the horse as if they really were a part of him.

Ryan wasn't sure how he'd be able to remove that outfit. The more he tried to think, the more Jennifer pulsed and throbbed with the pulsing of his own rapidly beating heart. He could tell the two were connected far more than just a costume. She was really attached to him, and she was really his cock. Moreover, a growing pressure between his legs told him that she might get the full package of being a cock soon. "I don't know how!" He replied in a panic. Thoughts of mares began to fill his mind. He needed a horse! He had to get out of here! It wasn't just about Jennifer, it was about his body too! He moved his 'arm', but that just moved his front leg! "I'm a real horse!" He let out a blasting frightened whinny and nearly jumped in fear. He was able to shake the thoughts of a real mare out of his head. Maybe it was mind playing tricks on him.

"H-hey! Relax!" Jennifer saw her full form when Ryan raised his upper half. She saw the massive flared shaft that was her. She was nearly two feet in length! The size was pathetic for a human, but for a cock, it was colossal. Moreover, a sense inside of her told her how excited Ryan was getting. She tasted cum in the back of her throat, a salty hot taste that made her almost want to vomit, but she knew that if she did, it would be seed coming out from her mouth. "A-ahn. R-Ryan!"

Ryan barely heard Jennifer. His ears, now equine in nature, flickered as he was still in a massive panic. He was still himself, but he was at a loss of what to do. The fight-or-flight response filled his body and, unable to fight the form he was changing into, there was only one other thing he could do. His tail flickered, and he raced to the door. With the enormous amount of strength that only an equine could possess, he slammed the door down and raced outside. His horse heart hammered heavily as he hurried away from the home. There was still a growing pressure of arousal and pleasure, though he had little idea where that was coming from as he was so frightened, but as he rushed away out into the wild, he would pause only briefly to unload that lust. He didn't know what he was doing, but he had to get out of the house. He had to go... somewhere.

Jennifer somehow sensed the various emotions flooding through Ryan. She blamed it on how the two were now physically connected. Regardless, the horse's speed was impressive. She had completely forgotten to even yell at him when he raced out of the house and into the bushes and trees beyond. By the time she stopped, Jennifer took in a deep breath to scream at him. She didn't pause to think about how she likely didn't even have lungs at that point. Rather than unleash a barrage of four and five letter words at the horse, cum quickly filled Jennifer's maw. Her eyes grew wide as she parted her lips and released his load, pumping out gush after gush of the seed that was Ryan the horse's.

Jennifer's head flattened with every load of cum that went from her lips and onto the ground below. Her nose retracted, and her hair fell out into the forming puddle of seed. It was as if with every pulse of cum she lost what was left of her humanity, and Ryan's as well. Jennifer was unable to do, or say anything to stop Ryan from cumming again, and again, and again. He orgasmed until Jennifer's body finished transforming fully into that of a cock, a horse cock perfect for the stallion it was attached to.

Ryan's heart continued to pound heavily. "I...I'm sorry." He stammered. He heard no response from Jennifer though. He couldn't see between his legs, but he knew what had happened. With a sigh, Ryan walked along, now alone with his cock dangling out below him, pulsing and throbbing, aching for something, ANYTHING. He wasn't sure where this adventure would take him as a horse with a living cock, but the only way to find out was to keep pressing forward. He noticed a barn up ahead and, with a mental nod, he clopped his way to it, hoping to find someone that could help him in his new form and maybe get himself, and Jennifer, back to normal.