She starts slowly

“I’ll just test the basic functions for now… I wish I could test everything but that would take too long and there aren’t any other volunteers…”

She made some quick adjustments to the settings, made sure the camera was on to record the test, and got comfortable in the arms of the machine. The machine immediately started moving, adjusting to have a more firm grip on Mei’s body and holding her arms and legs out in an X shape.

While Mei was still wearing her clothes, that was no problem. For someone so involved in sex toy development, one might imagine she would be quite adventurous. However the opposite was actually the case, and Mei is surprisingly reserved, performing tests on herself out of necessity due to a lack of volunteers more than anything else. She found it quite embarrassing to rewatch footage of herself in her inventions buck naked and writhing in pleasure, especially with the loud uncontrollable moans picked up by the microphones. As a result, she developed clothing with secret flaps for easy but completely concealed access, allowing her to test her inventions while not having to stare at her own nude figure, lowering the embarrassment somewhat.

It was also simply convenient for Mei. She always wore large baggy cargo pants with lots of flaps and pockets, so it was no problem to create an extra hidden one opening up between her legs. Her top was also easily adjustable. It provided more than enough support for her upper assets, but was simultaneously easy to pull up to expose her tits. It also helped that she didn’t wear any underwear. All of this made it easy to quickly and discreetly test her toys by herself without having to worry about undressing/dressing or getting caught.

“Alright let’s see, so far so good…”

The machine’s arms were calibrating and preparing for the selected experience, and once prepared a small dildo was attached to one of the arms and brought up against her pussy lips, rubbing it back and forth slowly, bringing out a soft groan from Mei.

The arm pushed gently and gradually began filling up her pussy, until it’s entire length was verified inside. It was about 5 inches, but because of Mei’s inexperience it felt much bigger. Mei was also naturally tighter down below so even the smaller dildos felt decently filling.

“Oh god… remind myself to put in a smaller one for people like me…”

Her train of thought was interrupted as the machine began thrusting in and out, gradually picking up the pace. It was certainly nothing crazy, but Mei was already a drooling mess, and it didn’t take long for her to approach orgasm.

“Oh shit already? I just started the test, no, ahhhhhh, I-I’M CUMMING!!”

The dildo slipped out once she climaxed and she slumped against her mechanical restraints.