As soon as the collar locks into place around your neck the transformations begin, you feel a tingling sensation all over your body and you feel it start to reshape itself.
First your whole body shrinks, your go from being a relatively muscular 6 foot man to being what appears to be a 5 foot 3 person with no real discernible gender, your arms and legs have shrunk in muscle mass and become much more dainty and feminine. Next your chest starts to push out and you start to grow a pair of breasts, its not painful so much as disturbing to watch. Your breasts stop growing at around a D-cup and sit pertly on top of your corset, at this point you realise that the clothes you are wearing have changed in size to match the changes that have happened to your body. Next you feel your face rearrange itself and though you cant see it you guess that your features are becoming more and more feminine, long blonde hair starts to hang down your face blocking your view until you instinctively brush it out of the way. The final transformation you feel is as your genitals start to retract into your body and while you wont know for sure until you check you think that the unfamiliar feeling that you have down there is what it must be like to have a vagina.
"What the hell!" You shout at your girlfriend, in a voice a lot more soft and dainty than you are used to.
"What that is the transformation aspect of the costume that I was talking about." She replied.
"I thought that was a gimmick something to draw in the crowds to buy the costumes not actual magic, and besides if the costume transformed me why did it wait till I got out here to do it."
"Well it says here in the instructions so that when you are dressed if you want to maintain your new form but remove the clothes you are wearing the transformation is activated by a small object worn on your person in your case the slave collar." She explains.
You reach up and attempt to remove the collar only to be unable to undo the locking mechanism.
"You cant undo the collar, in the case of a transformation into a submissive role only the person taking on the master role can remove the collar, its to increase the realistic feeling of being in a submissive position." She reveals
"Ok so remove the collar for me, I was not really prepared for this." You demand.
She then...