It was an important day for Asriel! He had a big speech to make at the monster ceremony. His parents took it very seriously, as it was one of the first big speeches their young prince would have to make! 
Asriel showered up in the morning, a little nervous, but prepared as he'd ever be. The naked goat monster finished up and wrapped a small towel around his waist, knowing his parents were anxiously waiting just outside the bathroom. At least they let him bathe with the door closed this time, but it still felt a bit invasive.
"Hey there champ!" Asgore greeted the little prince as he stepped out, "Woah! Where're your clothes little fella? Haha."
Asriel blushed, looking the other way.
"Oh come on now, no time anyway. Your mother and I've got your special robes all nice and clean." Asgore grabbed Asriel's paw and lead the way to their bedroom.
Toriel clapped happily as the prince entered, "There you are. We have your outfit all ready. Please try it on, let us see how it looks."
Asriel held up the deep blue robe, curious about how to put it on. As he held up his arms to look at it, his small towel slipped off his hips.
"Oops!" Asriel blushed - revealing his tiny little goat butt. Thankfully the robe was in front of his body, covering up most of him.
"Woah there little guy! I see a full moon out." Asgore laughed and gave Asriel a little spank. His naked tushie wobbled around as his cheeks grew more red.
"This robe looks too big for me..." Asriel whined, "I don't get how to wear it..."
Toriel took the robe from him and spread it in her paws, "I will help you. Raise your arms, little dear."
Asriel closed his legs instinctively, no longer having cover. He wasn't incredibly shy about being naked around his parents, but he was starting to feel a little too old to be doing it. His hands hovered in front of his privates, but he was just instructed to raise his paws by his mother, so...
"Sigh... okay." Asriel pouted a tiny bit, his crossing legs trying to hide his penis, but still showing off a bit of the base as it curved down between his legs and was softly squished in secrecy. Toriel moved so slow, Asriel bit his lip, feeling strange with his arms now up, his bare belly out, and his penis somewhat in view in front of her.
"Heh heh." Asgore chuckled, noticing Asriel tucking it all in. It was something guys tried to do here and there, but it'd been a while since he had.
The robes fell over Asriel's body - and somehow he still felt naked. He didn't have anything on underneath them, so the curves of his hips and belly sure showed underneath. He leaned downward and he could even see a little bump in front where his...
"Mom!" Asriel put his hands over his front, "This looks too revealing."
"Do no worry," Toriel reassured him, "You will be in front of the podium on stage, other will not notice anything."
Asgore nodded, "And if any ladies look, that just might mean they're interested."
"Is that so..." Toriel lowered her eyes, maybe annoyed, or maybe teasing. "Well, time is running short, so please hurry to the ceremony, my dear." She kissed his cheek, "But do not run too fast. Your father and I will be there shortly."
Asriel felt a bit funny but he hurries out of their room and left the house. He wished he could have put on more clothes underneath, it's not like anyone would have stopped him... but he needed to get there right away! 
Asriel once again had to venture through the puzzles in the underground. They weren't always easy but he was fairly familiar by now.
The first puzzle was a new wall he had to climb, but it was a bit tricky... this brick wall was covered in vines, and it was always rotating like a clock. Asriel grabbed onto the vines to hold on as it spun him around. He tried to climb up, but by the time he reached the top, the wall had spun 180 degrees and the top was now pointed at the ground. Usually Asriel would just wait for it to spin back up, but being upside down made his robe fall up, er, or down his body. He felt his bare white butt exposed to the world. The breeze from the spinning wall brushed by his butt fur, and tickled with embarrassment, he let go and fell on the ground. He squirmed around, his naked legs and fuzzy buns wiggling free in front of the rotating wall.
Asriel closed his legs and fell onto his side, looking around nervously and made sure no one saw. But as he looked into the distance, he saw many odd glowing eyes. There were always monsters hiding out in the darkness of the undergound! Of course they'd all stare at the well-known prince. But luckily no one said anything as he tried again - this time, he just let his bare butt show off as the spinning wall turned him upside-down. He patiently waited for it to spin upwards again so he could climb off the top of the wall and continue on his path, after adjusting his robes, of course...
Asriel next had to cross the air bridge, a new installment he wasn't quite used to, but it was fairly simple. However, a few flying monsters would just hang around the bridge, flying in the air like it was a breeze. A few of the Whimsalots stared at Asriel as he began to cross the bridge - and for good reason! There was a constant upflow of air, so Asriel's robes flew right up as he started walking!
"Mmff!" the little goat muffled a whine as his face was covered by the robes.
The Whimsalots blushed through their masks, as Asriel was all white fur from the belly down! And since he just stepped onto the bridge, it wasn't his furry butt everyone was seeing. The young prince's innocent privates were exposed! Asriel squirmed and wobbled about, making his cute princely bits wiggle around. The other monsters couldn't help but laugh! Asriel could hear them, and tried pushing his robes down to cover. He looked around, wide-eyed, as everyone calmed down. The gusts of air stopped, so he continued walking, but after a few steps it happened again! This time Asriel's legs were more apart, so he felt all tickled up his legs, around his butt, and under his balls as the warm breeze traveled through his most personal areas! "Gah!" Asriel worried, the monsters getting an even closer look at his embarrassing privates. His little penis even flopped around in the air and rose a bit from the strong whirlwinds below.
A very embarrassed Asriel pushed his robe down and ran across the bridge as everyone chuckled, as he ran the wind would come and go - showing off his big naked booty as he ran to the end of the bridge, everyone looking at his wobbling naked cheeks, and getting a glimpse between his legs from behind as he walked off.
Asriel couldn't believe he was being exposed like this. A prince definitely shouldn't go around showing off his privates! But he was also embarrassed knowing they were still growing... he hoped he wouldn't get in trouble, and hoped no one would mention it at the ceremony!
Asriel had just a few more opsticals to go through. A series of buttons he had to step on in the correct order, a large maze, and next was walking through bushy pathway. It seemed fairly easy, but the pathway kept changing and the bushes kept moving. One of their thorns caught on Asriel's robe and tugged away! The goat monster felt his robe tug and pull away from him, so he grabbed on and tried to keep it from tearing a whole in his fancy garb. Thankfully, he didn't struggle and waited for the plant to finish moving. The he was free to walk away with his robe all in one piece. No tears at all!
So he continued along and, well oops, one other thorny bush got his side instead. There was a clear ripping sound, and suddenly all the bushes moved again! Asriel looked down and watched the front of his robe cut open from the top, right below his belly! He squealed as his small white penis bounced free! He held his paws over his poor little penis and fell down as the twirling bushes finished tearing off the front half of his robe. Asriel's legs were up in the air, legs spread, with his poor little butt, taint, balls, and penis flopping bare and exposed! He quickly closed his legs, making his furry white balls poke out between his thighs, and sat up. He looked for the part of his robe that got torn, but it was being passed between the bushes, quickly shreded to bits.
"Oh no! Oh gosh!" He looked down, and made a run for it. He got a few more rips at the bottom of his robes but escapes the spinning bushes! Asriel couldn't walk around showing off his little penis like this. He really should have worn underwear...
So, he tucked his arms in his robe and turned it around, wearing it backwards. His naked white butt was showing off, but at least his boy bits were protected, and no one at the ceremony would see him from behind.
He was almost there, when he noticed a few monsters heading towards him! The young goat stood up straight, covering his butt behind him with his paws, nodding happily as Shyren, Aaron, and the others walked by. When they were behind him, he heard the feminine singer and the muscle stud laugh. They probably saw his naked little butt! Asriel ran ahead but tripped on his own ragged robe - giving the group a view of his butt and bits going up in the air, bouncing wildly, before he fell on his belly.
"You okay there little man?" The big horsely fella asked - but Asriel ignored him and ran ahead to the small stadium to get his speech over with.
Asriel made it to the backstage area, looking for some kind of clothing or replacement robe. He peeked out to the audience and saw a fairly large group of monsters, and cameras set to record the event. 
"Oh, I think I see our guest!" a famous haphazard robot announced, "Here's Asriel with his very important speech and unveiling!" Mettaton extended one of his long arms to grab Asriel by the collar and stand him in front of the podium. Just like he hoped! It covered him up farly well, and no one saw behind him!
"Okay, um, hello everyone!" The shy goat, extra nervous, began his speech. "Today we're unveiling what you've all been asking for." Asriel took a few steps backwards, trying not to turn around and show his butt to the audience, "If someone could kindly raise the curtain...?"
The curtain hooks came down and pulled them upward! However, they brought Asriel's robe up with them. His legs were slowly showing, and he looked down as he noticed a breeze! The crowd seemed to go quiet, with a few gasps, everyone looking too! Asriel looked down and saw the front of his robe raise in front of his face. "Wait! Wait, hold on!" He tried to grab the hook, reaching up and jumping a bit. The audience giggled, and soon the robe was completely up over Asriel's face with his arms waving wildly beside him! The cameras zoomed in and everyone's eyes stayed wide, as this poor little goat prince has his most intimate private place revealed to the huge crowd! Everyone in attendance saw a pair of soft white balls, tight and nervous, and a furry white uncut penis bouncing around in a panic above them! Quite a few flops and wobbles made everyone laugh at the silly boy on display. Asriel lifted a leg and tried to hide his penis between them like he did around his mom earlier, but spreading his legs wide on camera sure showed off a lot of detail. 
Asriel was soon lifted off the ground, kicking around his legs, holding onto the hook, no longer sure how to unhook himself, or if he even should! Boy and girl monsters alike giggled as the cameras could only focus on the naked bottom half of Prince Asriel! The ever-famous prince let all the monsters in the kingdom see his weenie in all its detail! The hooked robe started twisting, turning him around and showing his butt! Those that looked closer saw him moving around enough for his little package to shake between his legs, and an innocent little tailhole under his cheeks appeared. Anyone who was curious about Asriel got all their curious questions answered.
The robe eventually tore, and poor Asriel fell a few feet! He landed safely on his butt, the light bounce giving his bits one more wobble before he laid on his back, dizzy and tired from the struggle. Everyone was laughing, and his parents made their way on stage to check on him. Asriel realized he should get up, but his torn robes fell over his face, and the curtain dropped on his upper half, leaving nothing but his naked butt, taint, balls, and winky to show on stage. Everyone got a giggle seeing Asriel's undertail. No one could even recall what his important speech was about and what he was meant to reveal, since he revealed so much of himself...