I walk through the front door and take a moment to enjoy the peace and quiet. It's finally here, the school year is over and the students have all gone home, no papers to mark, no hungover students asking for more time, no misbehaving, no petty bickering, no meetings, no dealing with parents, just weeks of blissful peace. That and the project I've been working on, part of me thinks that I should enjoy the moment more but they'll be plenty of time for that once I'm restrained. Undoing my choking tie and removing my suit I walk down to my basement, hidden behind a wall of shelves, each holding various tools, boxes, devices and parts, is a large metal box, from the outside it looks smooth and normal but inside is a work of technological art. For the past few months, while my students were working on their own engineering projects, I've been working on this project and it's finally complete, the perfect long term self bondage device. Once inside the system will restrain, monitor, keep alive and pleasure and torture the occupant for the preprogrammed time, it even has emergency backup power incase of a power cut.

Having waited so long I really want to try it out, it really needs a test run and it's all that I've been thinking about for the last few weeks. I do a quick check, the emergency batteries are charged, the liquid food is full, the waste system is working, the restraints are good to go, the sensors are active, the computer is fully operational and has run a full diagnostic, everything seems in working order. I'm unable to wait any longer, I guess there's no time like thw present.

I set the program, duration, 1 week should be a good start time, I have over month, so if all goes well I'll set it for that next and have some real fun. Orgasms, let's set it to tease for now, with an orgasm in the last hour as a reward. Torture, random shocks, random extreme temperatures ranging from turning the box into a sauna to a freezer, random vice crushing, random feet caning, random opening of waste overflow, random withdrawing of meals, random choking, screw it all of them, it's only for a week and I want to give it a full testing.

Program start, 30 minutes.

I close the lid of the console built into the box and open the lid on the top of the box, a small dim strip of lights turn on around the walls of the box, it looks a bit like a large freezer when open, inside is a padded surface, providing a bitbof comfort and acting as additional soundproofing along with that built into the walls and lid, along with 13 heavy restraints, all of which will close, tighten and lock automatically once the program starts. I climb in and lay down, as it do I slid my legs between a small block with a cuff, pressing my crouch into it I open the cuff and slide my balls inside before closing the cuff shut again, trapping my balls inside, inside a device that at random will slowly move the sides in, painfully crushing my balls until the program decides I've had enough, how much and how long are randomly determined by the program, a pressure sensor will prevent to much, bringing me to just below the amount that will cause permanent damage.

Next I slide a ring over my cock, this will vibrate and shock my cock, both teasing and torturing me. I then push the catheter into my cock until it is fully inside me.

Next I make sure that my feet and legs are lined up with the restraints, same with my waist and the buttplug, its tip pushing against my asshole.

I then grab the large penis gag and choking and gagging slightly I slide it into my mouth and strap it shut. The dildo is connected to a tube which will provide food and water, it is also connected to an overflow, which shouldn't be a problem as I'll only be in here for a week. Finished I make sure that my arms are in the right position and wait.

"Program initialising." I hear the clicking of the internal locks sealing me in, no going back.

"Program starting." The restraints around my neck, arms, legs, wrists, ankles, chest and waist suddenly close tightly, holding me in place as the lubed buttplug begins to push against my ass, slowly stretching it open, after a few moments of increasing pressure it slams deep inside. I feel the plug expand, filling my already stretched ass and becoming impossible to remove until the program ends.

"Time limit..." the strip of lights in the box flicker slightly.

"Set." Everything seems fine, maybe it had to switch to the backup, I'm glad that I set such a thing up, although there is a safety feature built in where if there's no power from both the mains and the battery is nearly dead the program automatically ends and releases me but unless completely removed from the mains that's unlikely to happen as once reconnected the battery is charged.

As the lights switch off, only needed for setting up, and I'm plunging into darkness, I lay still in my prison and pull on my restraints, enjoying and testing them, they don't budge and continue to pin me down. I moan as I suddenly feel the ring around my cock and the plug in my ass vibrate, I wiggle in my restraints as pleasure builds inside, my cock getting hard. The vibrations suddenly cut out, leaving my hard cock twitching in desperation, I pull on my restraints once again in frustration but achieve nothing except becoming even more aroused, I lay waiting and hoping for another chance to cum as my cock slowly softens but I know that the program won't let me, sensors monitor my vitals, my heart rate, breathing, etc, and will cut off as soon as i near the edge of an orgasm.

I cry out into my gag as waves of electricity flow through my body, causing it to twitch and twist against my restraints as they hold me in place. As I breath hard into the gag I notice that the box is getting warmer, sweat forms on my body as the temperature continues to increase. As the box get warmer and warmer the air becomes heavier, I moan in discomfort in the now stuffy and unbearably hot box, as my sweat stings my eyes. As I lay in my own sweat I feel a sudden sting across the soles of my feet and scream in pain as they're hit again and again, my tortured feet unable to pull away from the barrage.

I lay in my prison exhausted, I have no idea how long it's been but the box has returned to a more bearable temperature, although it does now smell awful in here, I wish I'd put something to filter the air, it has holes to allow for airflow but the smell will linger for the rest of my imprisonment, in a way knowing that I now have this additional torture turns me on a bit, maybe I should add an upgrade that adds vile smells to the list of possible tortures.

Suddenly I hear a mechanical noise and feel movement around my trapped balls, quickly followed by an uncomfortable pressure as the space around them closes in, I groan in pain as the walls slowly begin to crush my balls, slowly squeezing them harder and harder, I pull frantically on my restraints in my helpless agony. Suddenly the pressure reduces and the walls retract back to their default position, leaving me breathing heavily as my balls throb and recover. That was a lot worse than I had expected, still I have built it to not go over a specific amount of preasure but it still hurts like hell.

I scream as another wave of electricity ripples through my body, as I shiver in the now freezing box. I'm not sure which is worse the hot or cold but right now the shackles holding me in place can barely contain my shivering body.

As my teeth chatter against the large dildo in my mouth I suddenly feel a flow of bland tasting thick liquid. Hungry and without any real choice I swallow it down. Afterwards a flow of cold water fills my mouth, both to keep me hydrated and also clean out the dildo. As I lay shivering I feel my neck restraint begin to tighten, the metal squeezing my throat as I start to choke and flail in panic as my lungs desperately try to get oxygen, as I start to feel lightheaded I pull against my restraints in fear, what if I didn't program it correctly or the mechanism gets stuck? Relief flows over me as the grip around my neck loosens enough to allow for air to flow into my lungs once again and I take deep and grateful breaths as I recover. As I try to catch my breath and rest my recovery is interrupted by another wave of shocks, causing me to cry weakly in pain.

I lay tired but unable to achieve sleep as cold liquid fills my bowels and my stomach swells, as painful cramps rip through my body, as the enema cleans me out. Forced to hold it in I pull weakly on my restraints as my insides strain and cramp unable to release until the program allows it to.

I sigh though my gag as the valve in the buttplug finally opens and I feel the pressure release as my insides empty, leaving me feeling exhausted and empty. My eyelids heavy I slowly close them to drift off to sleep, only to be jolted awake by another round of shocks and a teasing season. I moan as rest eludes me, as I'm trapped in the torture box of my own making.

Epilogue:

I gag as I'm forced to swallow down my own waste from the overflow, I have no idea how long it has been but something has gone horribly wrong. I know that I've been in here so long that the program has begun to ration my food, leaving my starving as I'm forced to consume my waste from the full waste tank. As I choke down on my rancid meal I feel the teasing vibrations begin their torment once more, as my ever hard cock twitches desperately as it's once again edged and my swallow balls ache as just after my teasing season they're once again mercilessly crushed, small amounts of my cum agonisingly squeezed out into my waste tank to be consumed later, the only relief from my wver growing painful frustration. Tears form in my eyes as my welted and bloody feet are once again whipped uncaringly, each strike hitting already damaged soles as I try to pull them away with no success, I'm not even sure if I can walk on them anymore. As I lay in pain, starving, desperately trying to get some rest from my own handmade torture any sleep is denied as I'm once again shocked, my body twitches and twists as much as my still firm and rigid restraints will allow.

It must be nearly a month by now, I hope it is. When I don't turn up for lessons someone will come looking for me and I'll be rescued from my man made hell, that's what I've got to hold on to, I'll be saved soon.

I look down at the large box with a cruel smile thinking about the misery of the occupant, my fellow lecturer at the University, with him out of the way the upcoming promotion is as good as mine. He did a great job building this machine, his fatal mistake was in his coding, from what I can deduce just when the program was starting up there was a brief power cut just as the time limit was being set and as such the program glitched and skipped over the actual run time, so the rest of the program continues to run until the allotted time, one that doesn't exist.

So far he's been in there for two months, when he didn't return from the holidays concerns were raised and after a week his house was checked but no one saw the large box hidden behind the shelves of equipment, even I missed it the first time, although even if people did see it they'd probably just think that it is some large fridge or storage box, one that they couldn't open.

Now I'm here, I volunteered to help clear out his stuff, he's been deemed missing presumed dead and I've been given the opportunity as a fellow engineer to take whatever equipment I want, including his last piece of work.

When he's back at mine I'll replace his food, maybe with something more disgusting, to prevent the safeties from releasing him. I'll also empty his waste tank, as much as I enjoy the thought of him choking down his piss and shit I need him to remain somewhat healthy in there, again not wanting to risk triggering the safeties. He'll stay inside his prison for a very long time, I hope that he enjoys it, if I put my ear to the lid I can sometimes just make out his screaming in pain, so I think that he is.