Akari blew out all the candles in one go. As Akari adorably applauded herself, Zoey let out an internal breath. Nothing seemed to happen. So it likely was just a tale. She approached Akari to get her own piece of the cake. “Congratulations, mast–”
Suddenly a feeling like electric currents was passing through her whole body forcing her down on hands and knees. Akari could only look in concern at her fiance on the ground. Zoey felt a weird tingling across her whole body, but soon came to realize that the feeling locking up her muscles wasn't actually painful, in fact it was quite pleasurable. Grunts soon turned into moans as Zoey decided to just allow whatever was happening to continue. Her moans soon turned into a scream as the weird sensations across her body coalesced into a big orgasm.
As the weird feelings faded Zoey fully flopped onto the ground, panting– or at least she should be panting. In fact, she quickly noticed she wasn't breathing at all. Not to mention she felt surprisingly clear in her head despite still riding the afterglow of that orgasm.
“Are you okay, Zoey? Should I call an ambulance?” Akari asked.
“D-Don't worry, I think I’m okay,” Zoey said as she slowly righted herself. “Probably just some weird allergic reaction to that costume. I’m sorry, but could you help me take it off?” Neither noticed the slight robotic tone of her voice.
Akari searched for the zipper on Zoey's back, but not only couldn't she find it, it also felt harder than usual. At the same time Zoey could feel Akari's hands as if they were touching her bare back. Concern welled up in Zoey as her hands went straight up to her head, but the headphones wouldn't budge. Similarly she couldn't find the edges of the mask. She jumped up to her feet and ran to the nearest mirror, despite the heels child’s play for a model. She also came to realize that she could feel the ground under her heels.
Looking into it confirmed Zoey’s fears. She had been transformed into a robot. She looked pretty much like an actual robot version of the costume she was wearing. White plating over most of her body with blue glows travelling up-and-down the black lines that now marked the joints of her movable parts. The part of her chest that was covered by the transparent latex was now some kind of light blue synthetic flesh. This included her breasts and pussy. And she found out they were quite a bit more sensitive as she experimentally touched one of her now blue nipples. Same applied to her now synthetic face, but at least it somewhat kept its skin color, even if more shiny. The barcode was also still there, now a permanent fixture on her face. A tap on the cat-ear protrusions confirmed that she now was hearing through those.
She heard Akari approach and turned to her. “I-I’m a robot, Akari. This… What… I don’t know–” She was interrupted by Akari ramming her tongue into her mouth.
Zoey wanted to be concerned, but she just couldn't at the moment. Over the years pleasuring Akari has become one of her kinks. Adding to that was that even with a business suit between them every touch of Akari seemed to give her twice the amount of pleasure. Literal sparks were dancing across their tongues while synthetic and normal breasts rubbed against each other. Ultimately their lips had to part again to allow Akari to breath.
“You're beautiful and I love you, no matter if human or robot. That said, I didn't think I could love you even more,” Akari panted. “Looking at your body makes me so hot. It’s like a fantasy come true.”
“That's because it is.”
“Huh?”
“The candles, they're magic. They're fulfilling the biggest, deepest wish of whoever blows them out.”
Usually when being told something insane like this Akari wouldn't believe it, but right now she had proof in the form of her girlfr– fiance, who just turned into a robot to make her biggest fantasy come true. “Actually, I have a small confession to make. There's a bit more to it than just you turning into a robot.”
Zoey's artificial eyes went wide. “Wait what? You have to tell me! What's going to happen to me?”