A Royal Punishment
The young fox was lead through a long corridor with a bag over his head and his arms in chains. At his sides were two men of the royal guard covered head to toe with heavy rustling armour. They walked just a bit behind the fox spears pointed at head and holding his chains. 
The door opened and the fox was led into the king’s court. All eyes were on him as he was led to the middle of the room and made to kneel.  The fox had the bag over his head removed and squinted as his eyes tried to adjust to the brightness of the room after having been locked up in a dark dungeon for about half a year. Once his eyes had focused he found before him a unicorn clothed in deep purple robes adorned with golden accents and with a crown of gold split in the middle to make way for the king’s horn.
“Everyone please rise in the presence of your king Amaris Vista II” said the judge standing next to the purple clad king.
“Ven Herron, You sand here accused of…” The judge pulled out a rolled up piece of parchment and as he let the paper unfold it rolled over the ground and unrolled into a meter long scroll of various offenses Ven had done overtime. Ven was not a good man. He was a criminal, but not just an ordinary criminal, he was a master assassin. 
Politics in the kingdom of Laplace has been a very complicated subject as of late. The old king has died, a new king has been crowned, the king’s brother had tried to stage a coup to usurp the throne, a few alleged bastards of the old king had popped up to try to claim the throne and etcetera etcetera…
Ven here has had quite a big role in all this being a proficient and highly sought after hit man being paid hefty amounts of gold to eliminate certain political targets. It seems though that he’d somehow screwed up this time.
“Okay let’s just fuck all that and get to the bottom of it” said an impatient King Amaris.
“6 months ago you were seen dressed up as a nun with a poisoned dagger in hand and right outside my son’s bedchambers and my son Prince was found lying on the ground having fallen out of a window with both legs shattered and with no memory of what happened…”
“Well I tried to sneak up on him but he managed to see me coming and dodged length of my blade by uh… backflipping out of the window… Quite impressive but not the most clever boy int eh kingdom now is he… “
“I see… After apprehending you, we had locked you up to be put on a fair trial but after just two days you had escaped  and set free multiple other dangerous madmen from the prison on your way out… Honestly at this point I could hardly care less about that. After your little encounter with my son he’s been left crippled and would likely never be able to recover completely even with magical assistance. You’ve turned my once promising beloved prince from an athletic swordsman prodigy to a cripple… After all this we were still willing to give you a fair trial and a platform to defend yourself but then you had the gall of not only escaping but  setting free countless other criminals on your way out… Do you not even feel any regret for what you’ve just done”
“Eh… not really. I was still paid quite a hefty sum for my services and I don’t really care all that much for how long you’ll lock me up… I’ll just leave when I get bored”
The entire room was silent in shock of what they were hearing.
“I… Oh how I would just love to strangle you with my own hands right now… but no… I am a merciful king and I won’t stoop down to your level… I have much much worse in mind for the likes of you…”
The king then ordered everyone to leave sans His royal guard, his court sorcerer, and Ven himself.
“My… You really are serious about this are you my highness”
“Yes… Death would be too lax a punishment for this filth”
“Well okay I guess I can start then…”
“Wait what’re you gonna d-”
The fox was cut short as he was levitated into the air. His wrists were suddenly bound to his shoulders by magic. His legs bent and his knees were brought up to his chest and ankles bound to the back of his thighs. He then found runes appearing all over his body as he was then being encased in a wooden frame covered with ivory. He was encased now in a white box leaving only his muzzle exposed through a circular hole in the cushion over his face.
“Well your highness it’s done… I’ve turned the man into a moving seat for your son. With my magic your son can now make his automated throne levitate and move about by simply willing it to.” 
“You have ruined my son’s future and now I condemn you to live the rest of your life serving him and kissing his ass”
Ven could not speak but could hear everything. The king was the first to take a seat on him. He sat his fat rump over the seat with the middle of his ass directly above the criminal’s muzzle. 
“Now let’s go see my son”
By merely gesturing the king had managed to make his human seat float and then move through the coridors of the castle. It went up the castle with ease but as they moved Ven felt fatigue as if the box he was encased in was directly feeding off of his life force. The sorcerer was tailing behind them both.
“So your majesty anyways you musn’t try to give him too much load lest he burn himself out. In this state he can still get tired but health wise it won’t affect him at all and he’s practically immortal while under my spell” 
“Great so he’ll last for however long Prince Allant will need him”
“Of course your grace”
As they arrived at the door the king blew a fart directly over Ven’s muzzle. Ven wanted to recoil  from the putrid air but for some reason he started feeling almost like he was craving it as his mouth started to water.
*knocknockknock*
“Allant… it’s me Daddy”
The door creaked open revealing a young chubby unicorn boy no older than the age of 13 in a crude makeshift wheelchair. 
“Hey Dad…” the boy said in the same monotonous tone he’d been speaking ever since the accident
“Ally I know how hard the last few months were from you. You’ve been locked up in your room most of the day lying in bed looking out the window watching my knights train while you stuff your face… I know how hard it is for you but you really should go out more and do… well something other than just this… So me and Archmage Winslew have been talking and… we have something now that’d make things easier and hopefully I can see my little boy happy roaming the halls of the castle again.
The prince gasped “You found a way to fix my legs?”
“Erm no… but… we got you this”
The king made pushed the levitating box into the room.
“Uh… cool I guess… what is this thing”
“It’s your new chair. It floats and by pointing to the direction you want to go it will float there”
The king propped his son up on Ven as he felt the boys plump ass sit ontop of him. He could barely see through the hole over his muzzle but he could see in plain view the boys ass. It was clad in thin cotton breeches. His ass was covered in sweat from sitting all day on a leather seat. He culd faintly see the fur of the unicorn boys butt through the wet semitransparent fabric and could make out where his taint and balls were.
The boy tried out his new levitating seat by immediately making it soar out the window and dove into the palace courtyard. The box stopped mere inches above the ground thankfully leaving the prince unharmed. As they landed Ven felt almost as if he just cannonballed onto the ground feeling the inertia rattle the insides of the box. 
“Wow Dad this is amazing. I can go anywhere”
“Yes dear prince but do be careful your enchanted seat can exhaust itself if you make it move for too long or too fast without a break. Me and your father made it so that you wouldn’t be able to do anything that could potentially endanger you” said Winslew
“Ally please don’t do that again. I don’t ever want to see you doing anything too dangerous alright” said the king
“Okay… Thanks anyways for this I promise you I-”
*poot*
The unicorn boy blasted with a hot wet fart. It seemed that that fall rattled the boys bowels a bit. 
“Well I think I need to go back and take care of a few things… Dad I might need your help for later helping me get off this thing”
“Wait Young prince before you do I should tell you we gave this seat of yours a few other capabilities that we forgot to mention. You’ve probably noticed but your seat has a hole right into the middle of it yes?”
“uh yeah?”
“Well we know how ever since the accident that despite your protests you’ve been having a lot of trouble lowering yourself onto even a chamberpot without assistance so… We’ve built one into your seat”
“Wait but-”
The boy was cut off by yet another fart. The fart was damp and Ven could feel the moisture of the boys bowels from the smell alone. For some odd reason he found himself getting aroused. He was confused now as to what the spell was doing to him.
“It’s not gonna smell and any waste that gets dumped into it will simply vanish”
The boy didn’t really have much of a choice as he felt a log starting to turtlehead.  The boy rushed back inside the castle witht eh aid of his box and found an empty storage room where he could find some privacy.
He closed the door behind him and thenlowered his pants to his angles letting Ven get a good view of his ass. Allant blushed in embarrassment as he saw the skidmark in his trousers as he pulled them down. Ven saw right above his nose the boy’s immature nutsack and penis. His cock smelt of dried cum and piss. Ven could tell that he wasn’t too keen on his hygiene despite being royalty. 
“Damn hole’s too small nfff”
The boy found that he couldn’t pee and poop into the box at the same time so hi lifted his ass up and grabbed his cock and pulled his generous foreskin back revealing a blotchy white glans. Upon closer inspection Ven saw that his glans was a blotchy pink and white due to a buildup of smegma. The unicorn prince started peeing into the hole right into Vens nostrils. As he peed he rubbed his glans using his piss as lube and scraped off some of that smegma letting it sprinkle over Ven. Ven couldn’t believe though that some reason he was now craving the boys filth and wanted more. He thirst for more of the boys piss and felt hunger for something much much filthier. After peeing the boy couldn’t really hold off that emerging log of crap any more and readjusted himself over the whole making theblack tip of the turtle heading shit scrape Ven’s nose.  The boy relaxed and let go as his log effortly rocketed out of his ass. It was a tough crap but Ven was compelled to gobble it all up.  His shit then turned into soft serve and flowed out continoulsy over Vents muzzle. The spell had not only given ven the ability to eat shiit but also the ability to eat at an astounding rate so Ven just gobbled up that rancid muck as it slid out the boys ass.
After 15 minutes of non stop shitting the prince pushed out one last turd and let out one last rancid fart. As he started to lift his pants back up the boy remembered how much shit was smeared over his cheeks. Having felt Ven’s nose graze his taint as he was shitting he decided to just wipe his ass with whatever he felt was protruding out of the hole. He dragged his filthy anus over Ven’s nose until he felt it was cleaned enough. After this he pulled his pants back up and went to see his father.
He approached his father and gave him a welcoming hug
“Thanks dad”