Jessica walks back into the changing room holding a white rubber unicorn costume with a rainbow mane meant for two people.
“You be the ass. I’ll be the head.” Jessica says tossing you the legs.
‘Sounds like a plan.’ You start slipping into the legs only to watch as your girlfriend started taking off her shirt exposing her lace white bra. ‘What are you doing!?’ You hold up your hands in a panic to cover your eyes. Jessica just looks at you like your the crazy one.
“These costumes are magical remember. I don’t want clothes getting in the way of the experience. I suggest you do the same.”
You can’t argue with that and start taking off your pants, thankfully no one was in this part of the store except you and Jessica.
Once both of you were naked you slip into the tight rubber pants and start playing with the rainbow tail as Jessica slips into her part. The costume was tight especially around the legs and crotch it was also incredibly hot and sweaty, what didn’t help was the knowledge you would be trapped in this sweaty dark place with your girlfriends ass for an indefinite amount of time. You pealed the sticky latex substance from your legs breath for a moment.
“Ready sweetie?” Jessica asks you from inside the golden horned horse mask. You gulp then nod. She turns and bend over letting you get a good view of her perfectly rounded ass, making it even tighter in the crotch area.
She had the pale white cheeks of a moon goddess, along with dark tan lines from someone who obviously enjoyed going to the beach in a bikini. It suddenly occurred to you, you had never seen Jessica’s back side naked before. You had also never worn a magical unicorn costume with her before. First time for everything.
You got up and walked hunched over to Jessica. Your hooves clopping against the ground. Walking upright felt unnatural. Like the costume wasn’t made for a human but an actual horse. You take a deep breath then dive into the opening sticking your nose between your Jessica’s perfect ass cheeks as the latex costume sealed shut around you.
You found your self alone in that dark place, sweaty, afraid, and incredibly aroused. Painful so. You tried changing positions a little to give your self some air. But it was no use.
Soon you felt a static shock at the top of your forehead travel up Jessica’s back and suddenly you could feel your legs in the front of the unicorn costume and your face in the mask. You think your nervous system and Jessica’s are now fused together. Starting at the tip of the plastic horn and ending at the base of the rainbow tail was now all you could feel.
That’s not all. The suit starts to tighten around you suffocating you inside the white latex. Surprisingly you didn’t die. You felt four legs shift and change growing longer, the bones cracking and snapping only to reform stronger and connected to the hooves.
You felt your body turn to jelly as Jessica’s organs moved down to fill the space. They soon became your organs to. The suit merged the two of you together. Your muscles becoming her’s and her muscles become yours’s your bones crack and snap reforming to become more horse like. Your hearts fused beating as one massive horse heart beating blood to your shared body. Your skin bloats and presses against the walls of the costume even more, filling out the mold of the snow white equine then going beyond it. You could now feel outside the suit like the rubber was your own skin.
You felt Jessica’s panic run through you as she to experienced all of this through your shared body, her face extended down the path of the muzzle. Her jaw and upper lip grew long down the snout. The nose holes that once served as eye holes now pumped latex smelling air through your shared lungs. The lips of the unicorn suit curled open lettering out a very horse like neigh. Jessica ran her larger tougher around her mouth, feeling her flatter teeth and the taist of latex on her lips.
The changes seamed finish for now were it not for one final change you dreaded most of all. A hole opened up at the base of the back legs of the unicorn costume. However this hole wasn’t for letting in air. It was a hole for dispensing pleasure. The holes lips curled and puckered as it drilled into your body, letting in a breeze that made you incredibly aroused having never experienced air inside your body. The walls of the hole were pink and sensitive serving a purpose of reproduction. The hole finally stopped its path once it reached at certain area and expanded into a space ment to hold a unicorn foul once the egg was fertilized. Once the womb was made you and Jessica felt a tingling throughout your body as small white hairs grew to cover your rubber skin.
It was official. You were now a white unicorn ass with your girlfriend Jessica who was serving as the head.