The cold wind flows over my exposed body, only covered by my metal collar locked tightly around my neck and the small chastity cage holding my throbing cock down and keeping me desperate and horny for my master. I'm used to being out in public like this, on full display, showing myself off as master's prized possession and enticing strangers to give master money to use me, which I'm always happy to do, the fact that I make master some money from being fucked is a bonus. However we've never come to here before, normally we never leave the city apart for when we go to events or special parties, tonight though for some reason we travelled to another city, one that feels familiar. It takes some courage, I know that I shouldn't question master and should always trust him but I can't help but ask.

"Master, please excuse my impolite, disrespectful and rude behaviour, but why did we come here instead of my usual spot?" My master doesn't seem bothered by my question, he seems somewhat amused for some reason.

"It's a test, one last test to see if your training and transformation is complete." Transformation? My mind fills with incoherent images, memories of being free, of meeting my master, of being restrained, of struggling against my restraints after days of endlessly being teased and denied, hearing master's words repeating over and over again, my mind and body conditioned and rewritten as the sleepless days constantly brought to the edge over and over again numb and reduce my mind. Flashes of painful memories appear for a brief moment, electric shocks burning my brain and begging and pleading to go home, of waking to my new face and not recognising it. I vaguely remember having a different face, a different name, but they're lost, replaced by the name and face given to me by my master, gifts only he could give me. He helps many people change how they look, making them happy and he gifted me with my current appearance. I push all those thoughts out of my mind, they're confusing and scary, I'm master's slave, that's all that matters, he takes care of me, he tells me what to do, he helps me when I get confused, he gives me meaning and purpose, and I love and worship him, I want to serve him forever, his grateful and loyal servant.

I watch as a strangely familiar looking man walks up, his eyes looking over my body, a look of hunger and desire clearly visible, I feel pride as he discusses costs with my master, I'm always pleased when I attract someone with the body master gave me, his gift giving me the opportunity to be used, to be fucked and to gain some relief from my ever aching balls and lustful desires. I feel the strangers hand wrap around my shoulders and he leads me away to an alleyway nearby, where we can be alone. Something about the older man feels familiar, but I can't put my finger on it, maybe he has used me before or maybe he knows master or maybe I met him before master, either way it doesn't matter, he paid master to use me and now i need to be good and do my job, one that I enjoy a lot. Turning the corner I look quickly back at my master who has a large smile on his face, which reassures me, if master is happy then everything is fine. As master's face disappears I slide my hand down to the bulge in the stranger's trousers, I can't wait to wrap my lips around it or have it fill me.

I hear the sounds of my slave pleasuring his client, the final test seems to have gone well, neither of them recognised each other. If only they knew, they'd be repulsed and disgusted at their actions but the job I did in changing both his physical appearance and mental state seems to have worked to perfection, plus if I can get him to do this then I can get him to do anything. 

I look up as my loyal plaything returns to me with a pleased and blissful smile on his face, his breath smelling of cum and his ass and cage dripping, I guess they had much time to catch up on, they haven't seen each other for a few years,  not since I kidnapped him after all.

"Did I pass my test master?" He really has no idea what he just did, either that or he is such a brainwashed horny little slut now that he doesn't care, either way it doesn't matter. I smile at my brainless sex slave as his bleak face looks at me with anticipation of my response.

"Yes, you did slave." I embrace him reassuringly, his face beaming without any worry in the world and with pride and joy at pleasing me and proving himself as my perfect slave, his arms wrapping lovingly around me as we walk to the car and head home.