A/N: I know I'm spoiling you all with a chapter again so soon. Here we are following Fell Sans. Now what I have done is that checks will be done in bold and italics while signing will be in just italics as opposed to the just italics for the check last chapter. Anywho, I do not own Undertale nor Underfell. See you next chapter my awesome peeps ^_^


Sans had woken up with a jolt, suppressing a yelp as always. He knew he couldn't let onto the fact he had nightmares, the boss would dust him for that. He rolled out of the bed as he scanned the room, it was a mess. He cursed mentally, he could have sworn he cleared up. Well nevertheless he did that, cleaning in a hurry to make it look semi presentable, hoping today wouldn't be one of the boss' surprise inspections. Sans walked out of the room but before leaving he looked around it. It may be a little cleaner but he also noticed some stuff out of place, the walls had less cracks in them and also not to mention the bed that was more together and it did feel comfortable. He would have stayed longer if it wasn't hearing the boss call his name.

He headed out of the room, already in his clothes, and closed the door. He had noticed the boss' voice sounded different, more excited and in a way smoother. He stopped in his tracks as he saw the taller skeleton in the kitchen stirring something in a pot, wearing the most ridiculous outfit ever. Not that Sans could admit it aloud, no the boss could punish him for that, so he figured this would be a test. Just to be on the safe side though, he ran a check. Something he couldn't do often, due to him nearly being hit with an attack for slacking. The check read:

The Great Papyrus,

LV: 1

EXP: 0

Likes to say Nyeh heh heh!

That confused him to no ends. He did not think the boss would ever loose LV or EXP. Not to mention the brief description, since when did the boss like to say that? Sans didn't know what was going on, but guessed this wasn't normal by any means, he'd need a talk with the flower if he could find him. "Uh, you called for me boss?" He spoke, his voice rough as always as he watched the taller skeleton face him. The facial features of the other was so different than to what he was used to. His teeth weren't jagged and he didn't have the scar running from his eye. Yet also, the other looked happy?

Sans had pulled his jacket closer to hide the collar the boss gave him that he had to wear. The collar was red and had a golden plate in the centre reading: property of Papyrus the great and powerful. That usually told monsters that Sans was more of his pet and even though Sans hated it, it did keep him from being dusted by monsters, just about though. Monsters still did want to dust him, they just kept distance and wait.

"AH THERE YOU ARE! I WAS WONDERING WHEN YOU WERE GETTING OUT OF YOUR ROOM!" He exclaimed with a hint of annoyance in his voice, of course it wasn't as bad as the boss he knows but this made him flinch nevertheless.

"Sorry boss, I was cleaning." He responded, glancing to the side with worry. He had anticipated a punishment yet it never came. When he realised this he turned his gaze back to the other and he had a concerned look on his face. Sans was even more confused now, since when did the boss care about him?

"SANS….SOMETHING SEEMS DIFFERENT ABOUT YOU. YOU LOOK SCARIER FOR ONE. SECONDLY WHY ARE YOU CALLING ME BOSS? YOU CAN CALL ME THAT ONCE I BECOME PART OF THE ROYAL GUARD. FOR NOW BROTHER OR PAPYRUS IS FINE…EVEN IF I DO BECOME PART OF THE GUARD." Papyrus let out a laugh before continuing. His voice becoming a little lower,

which was an oddity but he did it when he was worried. "ALSO…AS HAPPY I AM TO KNOW YOU CLEANED UP YOUR ROOM I'M WORRIED. ARE YOU FEELING OKAY SANS?"

"What? I'm fine boss. I mean Papyrus." Sans corrected himself. Having Papyrus say he didn't want to be called boss made him anxious but he called him by name anyways, not wanting to risk getting in trouble. He also lied with how he was due to the fact that if he admitted to having a nightmare just before he came down as he would be seen as weak. "I'm okay really. I'd just rather to go my post and do some work, cause y'know what happens if any humans come? I can't just slack off." He gave a nervous chuckle, knowing he could get harmed any second. He saw the look of a worried scepticism but then it turned into a smile.

"YOU'RE ABSOLTELY RIGHT BROTHER! TODAY WILL BE THE LUCKY DAY, I JUST KNOW IT." Papyrus laughed as he continued stirring the food, which he explained to be a trap for the human if one was to fall? Sans never knew for the boss to do that, it would be a waste of food and even then he would have poisoned it. Which was more common than not if you weren't careful getting food in the underground.

In any cases Sans didn't question this, instead he said bye and walked to his post. Now he was more confused on how busy it seemed? Many monsters were out and talking to each other with something Sans had only seen in Flowey and Frisk. Kindness. He gave a huff as he stuffed his hands in his jacket pockets as he walked through town, already a little tired from keeping his red eye light glowing and the other black. It used up magic and wore him out but he needed to look a little intimidating to make up for how he was an easy target. Although he could see the results, people were talking quietly when he passed and Sans chuckled at the fear he noticed on them.

When he had arrived at his post he thought of the things he never thought he'd see today: Papyrus being concerned about him, monsters being friendly with each other and ketchup behind his post. Of all condiments why ketchup? He guessed it must have been a prank by someone who wouldn't show themselves, which he couldn't blame as in all honesty as he would mess them up. He sat behind his post for an uneventful shift. He had taken a few naps but as he woke each time full alert, no one tried attacking him and Papyrus hadn't come by so for him this was his luckiest day.

When it came to his scheduled break he got up from the post and took a shortcut to Grillbys. Sure he didn't know why he went there still but it was the only safe place, aside his brothers cooking, to get food. When he entered the place he noticed it immediately. One it was full of chatter and like the town they were being friendly and Grillby was orange instead of purple. That got him to notice something was wrong about the place. He took a seat at the stools right at the bar and examined the fire monster.

'Sans are you okay? You seem different today.' The fire monster had signed. Now Sans wasn't used to him signing at all as he was usually talkative. He did understand sign language thankfully and understood him.

"Fine as always. Why wouldn't I be?" He almost growled as if the other was accusing him of something. Grillby's flames flickering faltered a little in worry and Sans noticed. He had learned to read the flames for how he felt as he never wanted to be around him when he was angry. He did not need to be caught up in that mess.

'Sans, if there is anything you can tell me. As your friend I am concerned and if I can help I will do my best.' Grillby looked as if he truly meant those words but Sans refused to believe that. Friends? Since when were they friends?

"Look I'm fine Grillby. I'm not some weak monster." He crossed his arms as he rolled his red eye light.

'Sans, you aren't weak for showing emotions. If anything showing emotion makes you stronger as it can help you carry your burdens with your friends. It can also be bad for you to keep emotions inside you. Also I must add, your eye lights. That must be tiring to change it to that.' Grillby's flames flickered gently in a soothing way.

"Yeah well I ain't speaking. Just give me some mustard will ya?" Sans held his hand out for it. He watched Grillby shake his head and get the mustard and put it in his hand. Sans had begun drinking it from the bottle and with a bit drunk he put it on the counter. "Yeesh, you're lookin' as if you never saw a skeleton drink mustard before."

'I haven't. You always have ketchup.' Grillby signed to the skeleton. What Sans didn't know though was that Grillby spiked the mustard. He always kept alcoholic condiments, being more of a bar restaurant and he knew from past experiences that this was a good way to get Sans to open up. Grillby sent a text message to Papyrus saying Sans would be spending the evening in his place, due to the fact he couldn't let the other go alone while drunk.

After a few mustard bottles Sans was at his limit. "You spiked my drinks didn't you? You want boss to punish me don't cha?" He asked with a slurred anger.

'The boss?' Grillby was curious as to who that was and why they'd punish Sans. He caught a look at the collar around his neck as his jacket parted. Papyrus. That confused the fire monster more, why would he put that on his neck?

"You know, the boss. Papyrus the great and powerful or whatever. I jus' want it all to end you know. All the pressure from the boss. I mean it'd be nice to do something without getting punished. Not to mention like escaping from this fucking world. I know they all want to dust me, I know. Yet they can't because I'm related to Papyrus, but I know they all watch and wait. Wait for me to become useless to him so I'm not his pet anymore, then they can kill me." Sans started to spill. He wasn't fully aware of anything past that, just everything went blank.

He woke up the next day with an awful headache and a warm feeling around him. Well he wasn't dead yet at least. Sans sat himself up as he looked in an unfamiliar room, just where was he? He remembered going to Grillbys for lunch break and drinking some mustard and then it went blank. Well he was thankful he didn't suffer from nightmares that night but he did have an awful headache, then he recalled something. "That bastard spiked the mustard." He growled under his breath as he got out of the warm bed.

He walked into what he could guess the living room to see Grillby sitting on the couch in normal clothing. He couldn't imagine seeing him in such clothing. He was wearing a white shirt with a green vest coat looking thing and black trousers on. Grillby looked over to Sans and motioned for him to sit next to the fire elemental.

'I apologise for what I did last night, but I see why you wouldn't say anything.' He signed as he moved his head to avoid a punch to it.

"You spiked my drink for one and two all for information? Yeesh, aren't you feeling brave." He huffed. His eye lights were now both white, something that wasn't normal on him but he was drained for the time being and hung over.

'Sans, I know it was wrong but I also know how secretive you can get. I was worried about you and I had a message from Papyrus saying he was worried. I will tell him you are okay, your secret is safe with me. But if I may, from what you were talking about earlier it seems different than to here.'

"You don't think I figured that out?" Sans growled as he rubbed his skull, he hated getting drunk. That was why he never did it often, that and the boss punished him for it. Something about it making more of a target. It was like he couldn't do anything these days.

'I do remember you once talked to me about timelines when you were drunk. Is it one of those things?' At that Sans' mind began ticking. It couldn't be a timeline as this clearly not where he was from but this was clearly Snowdin, unless.

"Of course. I'd guess an alternate universe." He grumbled moving to the kitchen and switched on a kettle for coffee, his savour. He was glad these things fell into the underground every now and then. He looked at his reflection and realised he had white eye lights and closed his eye sockets and opened them again, now having his one red and one black.

'I see…I believe what you are saying Sans. You are a lot of things but a liar isn't one. Well at least without tells. However if you are here and you say you are from another universe where is the Sans I know?' Grillby had learned to just accept things around Sans as he continuously broke all laws of physics, not to mention with what he had heard last night he was more convinced as the skeleton lifted some burdens, albite drunk. Grillby hoped he could help the other lift them while sober.

"Crap…that must mean he is in my universe. If he is anything like any monster I've seen here he'd be dusted easily. Especially if the boss figures out who he really is." Sans shrugged, talking as if it were all normal. He didn't know the other all that well so why should he care? However he could see the flames from the fire monster flicker with worry. He sighed as he made himself coffee. "Look, as long as he can try and pose as me, he should be fine. The boss keeps monsters from dustin' me. Let's just assume he still has use of me or no one is stupid enough to try and attack him, while they think it's me."

Grillby nodded as he moved aside on the couch, Sans walking and sitting beside him putting the mug of coffee down. Sans needed to think of what to do here, this wasn't his universe. He could do anything, he must be more powerful than them all, but his curiosity held him hostage. For a while he'd leave it all alone, just to see what it was like. For once, to not have kill or be killed shoved down you.