Be the obedient maid

Master John was right. If she played along, let herself be Kimiko, and took care of her Masters needs, he could focus on rebuilding the machine. That would be a good thing. Finishing the sandwich, she realized Master would certainly need a big cup of coffee to keep himself focused while he worked. She brewed a full thermos before going back down to the lab to give it all to him.

"Thank you, Kimiko," he said, barely looking up at her. "And coffee? Good thinking!"

"Thank you, Sir." Kimiko was surprised to find her heart flutter at the compliment.

"Now leave me in peace. The upstairs bathroom needs cleaning. I'll call you if I need you, and if not, make sure to have dinner ready by eight."

"Yes, Sir."

Back upstairs, in the bathroom, Kimiko caught a glance of herself in the mirror. It was odd, looking into the mirror and seeing this petite, asian girl staring back at her. So much smaller than the frame she was used to seeing. So much more feminine. So much more timid looking. So much more... submissive. She had started to suspect what Master had referred to when he had hinted to other things that had stayed with their bodies. There was something about being around her Master, about obeying his commands, that was... arousing. He was a powerful man, he expected her to do as she was told, and that though turned her on. She found herself pushing the thought away, trying to focus on the job at hand. But that only made it worse. Doing as she had been told did nothing to push the invasive thoughts she was thinking about her former body from her mind. If this was how Kimiko usually felt, she would have no problem agreeing to a contract to become a domestic slave. No. That thought was not alien to Kimiko, she could sense it. What if... What if Master John, instead of changing them back, decided to keep his body, keep his manhood and power, and instead decided to enslave her? The thought disturbed and aroused her. She didn't want that. But part of her... part of her found the thought attractive. Found it incredibly arousing. To be under Masters thumb for real, not as an employed servant but as an actual, owned slave. To serve not only his domestic needs, but his sexual ones. Needs she knew, from having been him hours earlier, meshed surprisingly well with her desires.

She soon found herself touching herself, soon found herself having her first female orgasm to this fantasy.