It was a peaceful day in Snowdin. The birds are singing. Flowers are (trying to) blooming. Snow is peacefully falling gently onto the ground.

All is well.

'BANG!!!!!!!!'

Everyone jolted, surprise etched onto all of their features as they saw a dark cloud of smoke start to trail up into the sky towards the skeleton brother's house. Well, except one.

Papyrus huffed, he knew where that came from.

As everyone stared, silent panic etched showing on their faces, Papyrus headed out towards the house. Really, Sans couldn't keep any part of the house clean for one day!!!

Papyrus picked up the pace as the house grew closer. He noticed that the smoke trail was actually from behind the house.

Papyrus slammed open the door and stomped up to his room. He ran in and quickly grabbed the spare keys to the "shed" in the back.

Running back down the stairs, Papyrus ran out of the house and towards the back. Papyrus quickly unlocked the door, coughing when the strong, and overwhelming, stench of chemicals and smoke filled his senses.

"SANS!!!! ARE YOU OKAY?!!"

The quiet sound of coughing reached his ears. Straining his eye magic, Papyrus was able to make out the smoky form of Sans.

"Yeah *cough* I'm *cough, cough* fine *wheeze*."

Papyrus frowned in worry. He quickly marched up to Sans and promptly picked him up, throwing him over his shoulder. Sans yelped and clung to Papyrus.

Papyrus then ran out of the door and placed Sans down, patting his back as Sans continued to cough, small puffs coming out of his mouth.

Finally, Sans' coughs died down. Sans' chest rose and fell rapidly as Sans attempted to catch his breath.

Once Sans had seemed to be able to breathe properly, Papyrus deemed it time for questions, "NOW, WHAT HAPPENED SANS??"

"Nothing really *pant* I was just trying to test out the machine. It kinda just *pant* blew up again."

Papyrus sighed, "REALLY SANS? YOU HAVE BEEN WORKING ON THAT THING FOR YEARS, ISN'T IT TIME TO MAYBE...STOP?"

Sans' skull jerked at that statement. Sans' eye sockets narrowed and seemed about to say something, before he slumped down.

"I guess you're right... yea I think it's time to finally throw in the towel now."

Papyrus' eye lights widened. He hasn't expected Sans to agree so easily! I guess it showed just how tired Sans really is.

With that thought in mind, Papyrus swooped Sans up and proceeded to walk towards, the smoking she'd left forgotten.

*TIME SKIP*

It has been around half a year since Sans has worked on the machine. It's been half a year since Sans has had something to actually do.

Sans sighed as he leaned against the couch, a bottle of ketchup in his hand. Since, he had said that he was going to stop tweaking the machine.

But, without being able to tweak it, Sans has been incredibly bored. He hasn't been able to let out the creative side of himself, he scientific side that is begging for him to seek the unknown, to see what that machine could really do.

"SANS!!! I AM GOIN TO GO TO UNDYNE'S AND TRAIN!! BE GOOD AND MAKE SURE YOU GO TO WORK IN A COUPLE HOURS OKAY?!"

"Course bro, I'll see ya at the end of the day. Have a good practice."

With that, Papyrus was gone. Sans slumped and continued to laze on the couch. However, as time passed, Sans started to fidget.

It started with the tapping of his foot, then slight shuffling, and finally his right hand fidgeting with the key that was in his pocket.

Finally, Sans cracked. Teleporting to the shed, he opened the door, and turned on the lights. The sight of his "lab" had a smile cracking at the corners of his mouth. He missed this place.

He loves Papyrus with all of his SOUL, but even he needs time away. Time to unwind and do anything he wants without Papyrus hovering over him.

After a while of standing in the doorway of his "lab", Sans set to work. For over two hours, Sans meticulously worked over the machine, in hopes that it will work just once.

Finally, the machine was fixed. The wires were properly placed and everything looked spic and span.

Finally, only the last component was that it needed a large power boost. This is where Sans would always mess up, always giving either to little or to much. But this time, he knew the exact amount to give this time.

Slowly gathering his magic, he let it build. Finally, after Sans had gathered just enough, he slowly, and gently, pushed it towards the machine. Sans continued to do this for around 10 minutes.

Finally, Sans felt that that was enough magic and promptly cut off his magic, panting from the exertion of low magic.

Now was the moment of truth. He was going to turn it on. Shakily, Sans moved his hand and hovered it over the ON button.

'Stars, please let this work.'

With that in mind, he pressed the button and all he knew was a bright light before he passed out.
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Sans groaned, his skull was pounding. What happened?? With a slight prod downwards, and jolted when he felt soft grass underneath him, seeming to have had cushioned his...fall??

Slowly pushing himself up, he managed to be able to look around, viewing his surroundings. Sans was surprised to notice that he did not recognize where he was. Where was he?!?!

Standing up, Sans noticed with a dull sense of exhaustion that he had practically no magic at the moment. This was dangerous, he doesn't know who he will encounter here.

Sans managed to pull himself up fully and walk around. Walking around, however, just made him even more confused. He didn't recognize any of this.

However, Sans stopped when he noticed the dull thump echoes that managed to reverberate throughout the room. The thumps continued to grow louder and louder, sounding as if it was coming closer.

Sans panicked. He had no magic!! However, before Sans could think of a decent plan, the person who was causing these thumps appeared. A loud roar shook the walls. Sans' eye sockets widened. What was that???!!!

The large robot-like thing stood there, as if trying to get a good look. The eyes of the robot grew dim and Sans could only hope that something happened to it. Standing up, Sans slowly tried to inch away.

However, almost as if a switch was flipped, the robot burst to life! Sans jolted and tried to run faster, but only succeeded in tripping over a root and falling.

The robot burst forward and raised his arm like he was going to attack. Sans shivered, fear gripping his SOUL. This was how he was gonna die, beaten to death by a huge robot. Sans squeezed his eye sockets, preparing himself for the attack.

However, Sans jolted when he heard a loud slashing and bashing sound, Sans didn't open his eyes though, he was still waiting for the attack.

"Heya, and who might you be?"

Sans shivered at the voice before he noticed the similarities to his own voice. Sans' eye sockets shot open, his eye lights landing on a mysterious figure, the robot destroyed underneath him.

Sans' eye lights shrunk when he noticed who and what the mysterious monster looked like. It was him.

Across from him, stood an almost exact look-a-like to him. The only differences being his clothes and his magic.

Suddenly something in his kind clicked. He now knew where he was. 'I'm in another universe..'

With that in mind, Sans introduced himself, gaining a surprised look to the other Sans, before a smirk crept onto the other monster's skull, the other monster held out his hand.

"Well then, I guess you can come with us. I can house you and tell you about this world. What do you say?"

Sans hesitated, who knows what can happen? But...he doesn't know where he is, he'll need all the help he can get.

Sans stood up, and grabbed the others hand.

TIME SKIP!!!!!!!!!!!

Months have passed and Sans and Nex (his nickname) have slowly started to grow closer. However, it was only recently that both Sans and Nex have started dating.

To say that the Papyrus of this universe was surprised was an understatement, however he seemed to accept this seeing that Nex was happy.

Also, during these few months, Sans has also been working on another machine to return home.

However, with this news piece of info, Nex is not quiet happy about it. Now, on the outside Nex may seem happy and supportive, however, it's just not quite true. Deep down, Nex is scared that Sans will return home and then never come back, leave Nex alone forever.

And Nex just can't have that, so he is going to have at least show Sans that he already belongs to someone. H I M.
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Sans sighed, exhausted but also feeling very accomplished with himself. Sans was almost finished with the machine and then he could begin visiting Paps again. No matter how much he loved Paps..he wanted to stay here, with Nex.

Smiling to himself, the sight of Nex filled his skull. His voice, which was smooth and a few octaves lower, the way he just exudes calmness, how hot he looked when he activated his magic---

Sans blushed at the thought. Truth be told, Sans has wanted Nex to take him for a while now. Just the thought of it had his bones warning pleasantly.

Sans jolted when he heard the sound of the door opening. He looked and smiled at the sight of Nex. However, it quickly dimmed when he felt the intent that was gathering around Nex.

"Nex, are you o---mmpph?!"

Before Sans even got to ask Nex if he was okay, Nex had started kissing him. Sans moaned when he felt Nex's tongue swipe against his teeth, almost begging for permission. Sans granted it and opened his mouth.

Immediately, Sans was overwhelmed as Nex roughly started to kiss him, his tongue touching everywhere in his mouth and dominate his own tongue in their rough dance. Sans felt as Nex started to quickly guide Sans to the chair and push him down into it, their mouths still deeply kissing each other.

Sans panted, his head felt heavy, but he still felt his bones warming pleasantly with arousal. He didn't know what brought this on but Sans sure liked it.

Finally, they both disconnected, a long trail of saliva trailing between them. Sans only was able to get a quick peek at Nex's face before his shirt and shorts was being tugged off. Sans groaned, but let him, flushing when he felt Nex's ravenous gaze rake across his body.

"Stars, Sans. You're so beautiful. I could just eat you up~~"

Sans blushed but was quickly distracted when Nex began to fondle his bones, starting with his collarbones and finally trailing down to his pelvis. The whole time, Sans could only feel the massive amounts of pleasure that Nex's touched were giving him. However, a rough grind against his pelvis had his magic popping in existence, his pussy already sipping with his arousal.

Sans blushed when he heard Nex chuckle lowly, "Someone sure is excited today~"

"Well *pant* that's not really my fault, now is it?"

Sans weakly grinned in defiance before yelping when he felt Nex's dive two fingers into his pussy and start stretching it. The resulting burn felt amazing!!~

"AaaGGHH Neeexx!!~~" Sans screamed, the pleasure only increasing.

Nex blushed as Sans screamed. Sans really was the most beautiful monster in the whole world. And he was all his.~~~ and boy was he going to abuse that power right now. One of His hands trailed down to his shorts and pulled them down, revealing his very hard cock.

Sans, however, noticed none of this because he was lost in his own world. Lost to the pleasure that he was receiving. Also because if the amount of pleasure that he was receiving, Sans didn't notice Nex take his fingers out of his pussy and quickly replace it with his thick cock.

Sans' screams managed to reach an extra octave higher when he felt the burn of Nex's dick. It-it was so---

"So big," Sans gasped out, his voice heavy as he clung to the arm rests on the side of the chair.

Nex groaned as he plunged himself completely in, reveling in the feeling of Sans's walls clenching around him, trying to accommodate his size.

"So-so tight, " Nex managed to hiss out, his voice also heavy as well.

After a few minutes, the burn faded and Sans nodded in okay. Seeing this, Nex started a slow pace that slowly grew rougher and rougher.

"You *pant* are M I N E!!! No one else can have you, ya hear?!? Mine!!"

Sans screamed in agreement to Nex's words, "YOURS!!! IM ALL YOUR'S AND NO ONE ELSE'S!!"

Nex thrusted, feeling the tell tale signs that his climax was fast approaching. After a few more thrusts, Nex managed to jab Sans' insides and let out a low, and guttural, groan of ecstasy.

Sans yelped as he felt Nex cum into him, forcing an orgasm out of Sans as well. Slowly, the both of them calmed down, the aftershocks of their overwhelming orgasms still pleasant.  

Sans sighed when he felt Nex start to pull out. That had been amazing, by far the best sex he's ever had.

Immediately, Sans was gathered up into Nex's arms and teleported to their rooms. Nex set Sans down and immediately started to cuddle him.

As Sans fell asleep, he could hear one last thing from Nex that made his SOUL pulse with love.

"Mine.."

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And...CUT!!!! That's it!! Whew, done!!

I'm sorry this took so long. I had some story line problems and I also have finals next week so I've been studying like crazy!!

I'm sorry if there were any grammatical errors and if this feels too rushed, I really wanted to get this out.

So the list of next chapters are lined up like this:

1). Afterdeath
2) Bad SansX UT! Sans
3) Kustard.

Thank you for reading, I really hope you enjoyed this!! 😊😊