Okay...I know I was supposed to upload this yesterday, but my family came to visit so I spent the whole day with them. Plz don't kill me!

I did upload this fact on my profile though. Hah! Can't be so mad at me can ya? It's not my fault you didn't check my profile. I even mentioned this before in an author's note that if I didn't upload then you should check my profile for info on that.

Anyways, now you know that it wasn't my procrastination skills that kept me away. (They're very good I'll have you know.)

Welp, better get onto the chapter.

P.S I apologize for any mistakes I make.

"Come on! I wanted to give him a little beat down of my own!"

Lucy sighed. "Just be glad that-"

"How did he even beat him up in the first place?!"

"That's what I was going to tell you, but you kept interrupting me!"

"Fine! Tell me! I wanna know!"

"Well, if you were paying any attention at all, you would've known that Sans was going to tell us after we filled you in!"

Natsu immediately turned his attention to Sans. "How'd you do that?!"

Sans grinned at Natsu. "do what?"

"Beat him up!"

"i dunno what you're talking about."

As the pair argued, Lucy discreetly whispered to Gray, "Is he going to keep ignoring the fact that Sans is a freaking skeleton right now?"

"Probably."

Erza stepped between the arguing pair. "Enough! Sans, you said you would explain so now, explain."

Sans's previous demeanor changed instantly. He instantly went from laid-back and calm to fidgety and nervous. His smile looked tense and his eyes- no, eye lights -kept glancing in different directions. His skeletal hand scratched the back of his head as he nervously said, "heh, well, let's see, how should i put this...how much do you guys know about alternate universes?"

The group of wizards looked at each other. This was a bit unexpected. Lucy decided to speak for them. "Um, actually, we've had a bit of experience with them…"

Sans somehow made his facial expression look like he was raising an eyebrow. How he did that, Lucy had no idea. He was literally a skeleton. That shouldn't be physically possible. In fact, she was so engrossed in her thoughts that she nearly missed Sans's next words.

"experience?"

"Yeah, a while back we went to this alternate universe called Edolas."

Natsu jumped in. "Yeah! It was pretty cool there. We got to meet all out counterparts and got to stop the king of Edolas from killing off all the Exceeds there and-"

Lucy interrupted Natsu's rambling. "It was a pretty interesting experience overall."

Sans looked relieved. His stance went from tense to relaxed in a second. "welp, anyways. the reason i asked you guys about alternate universe is that, erm, i'm from one myself."

The group of wizards raised an eyebrow. They weren't all that surprised. Natsu and Happy had expressions that looked like a mix of excitement and surprise. Gray and Erza simply looked bored. Lucy looked the most shocked out of them all but, even she wasn't that surprised. Honestly, Lucy expected something more. But, she supposed that strange was the definition of normal for Fairy Tail wizards. She sighed to herself. I guess that explains why he's a skeleton...does that mean there's other walking, talking skeletons in his universe?! I swear, every day gets weirder and weirder for me ever since I became a part of Fairy Tail.

Then, Natsu's voice interrupted Lucy's thoughts. "Whoa, that's so cool! What's your universe like? Is there anybody that's strong over there that I can fi-"

Lucy cut him off. Suddenly, questions started pouring out of her mouth. "Why are you here then? When did you get here anyways? You seem to know a bit about our history so you must've came here a while back. Actually, how did you even get here?! Edolas closed all gateways and as far as I know, there aren't any other ways to any other universe. Also, what's your uni-"

This time, Sans cut Lucy off. "for your first question…that's a different story all together. for your second one, i got here about three years ago. i read about the history of this place when i first got here to help me blend in. i also picked up some transformation magic to help disguise myself but, for some reason, when i use my powers, i turn back into a skeleton. but how? heh, well, you see…i'm exactly sure about that myself."

Erza raised an eyebrow at Sans. "What do you mean by 'not sure'?"

Sans looked hesitant for a moment. Then, he slowly said, "i was fighting someone and…things didn't go exactly according to plan so i ended up here. tibia honest, i wasn't expecting this myself either."

Erza ignored the pun and took in what Sans said. She was discerned about the lack of detail in his explanation but so far, he'd given them no reason to mistrust him yet. But, though she had many other questions on her mind, (many was an understatement) there was one she knew she had to ask right away. "Sans?"

"that's me."

"What's that machine down in you lab for?"

"huh?"

"The machine. What's it for?"

"erm, can i ask why you're asking?"

"The man you fought was called Daku and he was after your machine. Before he teleported to your location, I saw a guild mark on his left hand and, it was the mark for Midnight Barrem."

Immediately after Erza said this, four gasps of surprise came from besides her. All of the Fairy Tail wizards had expressions of shock on their faces. Lucy exclaimed, "Midnight Barrem?! How?! Are you sure?!"

Sans looked at the wizards with a confused expression on his face. He did a few wild hand gestures while saying, "erm, s'cuse me. alternate universe traveler over here. mind explaining to me what midnight barrem is?"

Gray looked seriously at Sans. "Midnight Barrem is the most dangerous dark guild in Earthland. Or used to be anyways."

"used to?"

"A while back, the Magic Council caught wind of their location and brought them down but, some members escaped. Ever since then, no one has heard from them since. But now that they're back, it could mean the end of the world as we know it."

Sans shrugged casually, seemingly unconcerned about what Gray had just said. "k. you said he was after my machine?"

Erza nodded. "And he teleported it to an unknown location."

Sans immediately became more alert. "….you didn't mention that before."

"I thought there were more pressing matters on hand."

"as much as i like jokes, please tell me you were kidding when you said my machine was stolen."

"I wasn't. Now, tell us what the machine does."

Sans stared at the wizards in front of him. He was really having a bad day today. First, he had to fight some crazy guy. Then, he found out his machine was stolen by some dangerous dark guild. That was bad. Extremely bad. He sighed to himself. He was really hoping he'd avoid talking about his machine. Thanks to the CORE accident so long ago, he knew that space and time shouldn't be messed with. His father had received the consequences from their experiment so long ago.

Really the only reason he was even messing with time and space was because he had to. He didn't belong here. But, now here he was, about to explain everything to a group of strangers he had only met a couple hours ago. At this moment, Sans decided that the universe really hated him for some unknown reason. Actually, as Sans put more thought into it, he realized the universe probably hated him since the minute he was born. He had so many bad things happen to him over the years. He sighed. He knew his skill for annoying people would come back to bite him one day.

After a bit, Sans spoke. "i told you guys i didn't know how i got here right?"

The wizards nodded.

"so, after i got here, i've been looking for ways back."

Realization hit Lucy. "And that machine is your way home right?"

Sans nodded. "that's right."

"You can go to whatever universe you want any time you want?! That's so cool!" said Natsu.

"Can you go to a universe where they have lots of fish?" asked Happy.

"Am I the only one wondering how this is possible?" Lucy questioned out loud.

Gray frowned and exchanged glances with Erza. He could tell they were both thinking about the same thing: why would Midnight Barrem want a machine that could travel to other universes? Gray couldn't think of any reasons why they would need a machine like that. If it was time travel, Gray would be extremely worried. He knew that time itself was very dangerous to mess with but, it wasn't. He couldn't really think anything really threatening to Earthland related to alternate universes. He supposed that they could recruit other beings from other universe to help them…

Suddenly, Erza spoke. "Why would Midnight Barrem want your machine? I don't see how it would help them destroy Earthland."

"me neither. but's that's not what i'm worried about."

"Then what?"

Sans thought for a moment before saying, "well, to get to other universes without purely relying on magic, you'd need to rip a hole in the space time continuum from this universe."

"Your machine doesn't run on purely magic?!" exclaimed Lucy.

Sans ignored her and kept talking. "but, the further the universe is, or in other words, the more different the universe is compared to this one, the bigger the hole."

"I still don't see how that's worrying."

"heh. well, this universe, to put it this way, it wasn't built for traveling to other universes."

Natsu frowned and put his hands behind his head. "I don't get it."

"some universes, like mine, are able to withstand things like ripping holes in the space time continuum. no matter how many holes you rip, the universe would stay intact. only during… rare occasions something bad could happen." Sans's eye sockets went dark for a second. It was like he was remembering a bad memory. Then, immediately afterwards, his eye lights went back on. He continued his talk. "because of that, some…people took advantage of it."

"Some people took advantage of it?" questioned Gray.

Sans's eyes immediately went dark. It was clear he didn't want to elaborate any further on that topic. "anyways, the point is, your universe can't take that same brunt. the more holes that are ripped, well, let's just say it won't end well for anybody."

Erza put her hands on her hips and narrowed her eyes at Sans. "What do you mean, won't end well?"

Sans thought to himself for a moment before saying, "imagine a bucket of water. if people put a couple of small holes in it, it won't do much and with time, can be easily fixed. but what happens if there are multiple holes? or one giant hole? then the water would leak out completely before anyone could patch up the holes. same with your universe. a few small holes are ripped? nothing extremely bad would happen and with some time, the magic in the air would naturally fix them up. but, too many holes at the same time would result in your universe draining away."

The wizards stared at Sans in shock. Lucy stammered out in a pitch considerably higher than her normal one, "O-our universe could be destroyed?!"

Sans shrugged casually. "yep."

Happy looked mortified. "That means no more fish!"

Lucy glared at him. "There are more things than just fish at stake here you stupid cat!"

Then, Lucy turned her glare at Sans. "And you! How can you be so casual about this?! It's technically your fault we're in this situation you know!"

Sans held up his skeletal hands in a surrendering gesture. "buddy, look, i'm sorry, but i never trout that anybody would fin out about the machine. i've never told anybody about it before and i've never had anybody over at my plaice. i dunno how they've found out about it. trust me. i'm just as confused as you are right now."

Erza said, "Puns aside," Erza shot Sans a glare. He just shrugged and winked back. "Your statement does raise the question: How did Midnight Barrem find out about your machine in the first place?"

"welp, can't help you with that question buddy."

"Are you certain that you've told no one about the machine's existence?"

"yep. i'm a hundred percent sure that no-body knows."

"Then I wonder…how did they find out?"

"Why don't we just ask that Daku guy?" asked Natsu.

Erza slapped a palm to her forehead. "Of course! Why didn't I think of that myself?!"

Everyone's gaze drifted to the unconscious man at the corner of the room.

Sans shrugged. "welp, looks like we got a wizard to interrogate."

Daku woke up to the two things he hated the most.

One of which was a pounding headache. The second was bright lights.

He groaned out loud. He was going to kill whoever did this. I swear if this is her idea of a joke…

He let his eyes open a sliver more. Ugh, there's so much white. Wait… white? This isn't my room…

He opened his eyes all the way while blinking a couple of times to get rid of the spots in his vision. He looked around him. He was in a completely white room that was illuminated with bright lights. He swore out loud. On top of his pounding headache, it was the worst combination ever. I'm so going to kill her-

Then, he frowned. He looked down and around his wrists were anti-magic cuffs. He knew that she liked to go far in her practical jokes, but he knew she wouldn't go this far. But that raised the question: who did this to him?

He groaned out loud again. The memories of the past 24 hours were hazy, and the pounding headache didn't help at all. He shook his head in attempt to jog some memories. He sighed. All he could remember was that bright light he saw and the fear he felt before getting knocked out by those-

Daku suddenly jumped to his feet, a venomous expression on his face. He remembered. The mission was supposed to be simple, an easy in and out.

But he hadn't accounted for the scientist.

The scientist…he could do magic. Extremely powerful magic. He remembered how he easily dodged all his attacks. The only person to do that and was still alive was his master. He growled. He was going to kill that scientist. He grinned. He was just caught off guard by his magic. Next time they met, that scientist was as good as-

Daku's thoughts instantly froze when another memory came back to him.

"do you wanna have a bad time?"

The way the scientist said those words….it was like he was no stranger to those kinds of situations. It was like…he knew he was going to win. And as Daku put more thought into the scientist, he realized a few things.

The scientist wasn't just a scientist. The way he fought, how he calculated his moves...it was like he was a veteran to fighting.

The scientist wasn't just a scientist.

He was a wizard. A very powerful and experienced one at that too.

His master hadn't told him this. Actually, had his master even known? The way his master briefed him about the scientist…it was like they had been friends with him. In fact, it was like they had years- no, centuries- to study every bit of the scientist, from how he looked, right down to his habits. But, they didn't say anything about magic. That was a bit strange.

Daku forced himself not to be mad at his master. After all, it was because of them that Midnight Barrem was back. It was because of them that they got a second chance to reclaim what was rightfully theirs.

Then, Daku had a startling thought. The communication lacrima!

The communication lacrima he had been using before was a pocket sized one. It was small and was easily able to be put away in a small pocket. That was why he put it in the inner pocket of his cloak. After a bit of struggling, he managed to reach a hand inside his cloak pocket. He felt around the pocket. He grinned wolfishly when his hand closed around something. He pulled out his lacrima and spoke quietly into it.

"Master, are you there?"

Daku held the lacrima up to his ear, hoping to hear a response. He let out a frustrated sigh when he heard nothing back. He cursed. He would have to send a message. He spoke softly but quickly.

"Master, I have sent you the machine but I regret to inform you that…I've been captured by the enemy. I am in need of extraction. I'm in a secure room so, I assume the enemy is going to soon interrogate me soon. There are anti-magic cuffs around my wrists so I am unable to perform magic to get myself out. I request that you get me out of here as soon as possible before the enemy finds out about this message. But, there is somethings I must inform you master. The scientist…he can use magic. Powerful magic too. Be careful, he also has Fairy Tail wizards on his side too."

Suddenly, Daku stopped talking when he heard footsteps outside. He quickly put the communication lacrima away before anyone spotted it.

He grinned. This was going to be fun.

Let the interrogation begin…

Author's Note:

Disclaimer: I don't own Fairy Tail or Undertale

So it looks like you found my weakness...explanation chapters. (And writing puns. I'm so bad at those. Thanks Sans.) Whenever I try to write explanations, my mind literally blanks out and I get writer's block. Thanks brain. So, sorry about that.

Now, let's backtrack to the chapter itself for a sec. For those of you who still don't understand what happened, let's sum things up a bit shall we?

Sans got to the Fairy Tail universe three years ago for unknown reasons. He doesn't know how he got there at all. When he got there, (after lots of confusion and skull scratching) he researched about the universe so he would blend in. He also learned some transformation magic because, let's face it, if you saw a walking talking skeleton (and are a normal person) you would probably freak out. Then, he started building a machine to try and get back to the Undertale universe and, the rest of it you know.

Anyways, I'm sure most of you were probably expecting something like "Sans telling the wizards about his universe and them freaking out" or something around that ball park and, I did try to write the chapter like that at first. But...it did not turn out well. It literally became the writing version of a filler episode. So, I wrote this instead and this turned out much, much better.

But, for those who wanted to see Sans tell them about his universe and the wizard's reactions, then you're in luck.

Once I finish this story, I plan to add a couple bonus chapters. They'll range from Sans's perspective on when he first got here to the Fairy Tail wizards learning what Sans's universe is like. So, it's a win-win.

Oh yeah! You might be wondering why Daku didn't realize Sans was a skeleton because he clearly saw him as his true form. Well, here's my simple explanation that for some reason, didn't get put into the chapter like it was supposed to.

So, whenever Sans uses his powers, he becomes a skeleton. Daku only saw his skeletal form for a few seconds before being knocked out. Add that to sketchy memory, bright blinding lights, and a headache, you get a Daku who doesn't realize the scientist is an undead being.

Also, one more thing. Sans just seems casual about this predicament. He's actually a bit worried about this himself. But, remember, he's very apathic which is why he can't seem to care that much.

Welp, I better stop writing or this author's note will become longer than the story itself.

Till next time!