First chapter is up! Yeah! I'm so excited to write this series! I hope you guys enjoyed Deathly Exchange, cause now comes a series with a similar basis to it. Sanses and Curtains of alternate worlds meeting!

The first Sans is Error Sans. And as I said before, if anyone wants to suggest a Sans, let me know.

Quiet.

That's all there was in the void.

Silence.

That's all that would greet you in the blank abyss.

Stagnant.

It never changes.

Endless.

There was no end to this blank canvas.

This is where he calls home. This is where he became who he is now.

Error. Sans.

Trapped in the void for an extended period of time has had it's effects upon him. Contact was cut off from everyone, so contact with anyone causes extreme discomfort. His sanity was slowly slipping. His mercy became shortened. He learned how to cease and destroy.

He wanted to destroy those universes that weren't the original, but after the war, he made a truce with the Guardian of universes.

But now he was back in the blank canvas of the void. He was infamous among many worlds, so he was mostly unwelcome, besides the few who saw that he had potential for good.

Although he decided that being alone brought him contentment, deep within himself, beyond the glitches, longed for something more in his life...

Something he didn't expect...

Start.

Standing in void stood Error Sans, as he was untangling blue strings that were wrapped around his hands. He wore a black open jacket with a red turtleneck shirt underneath, and black shorts with red slippers and yellow socks on his red skeletal legs. His jacket had blue strings sown around certain parts of the arms with yellow lines on the edges, and his shorts had a yellow vertical line on each side of the legs. His skull was black, the darkness of his hollow eyes were red, and the pupil of one eye was blue and yellow, while the other was only yellow like his teeth. Occasionally, he would glitch codes from his body and the word 'ERROR' as well. There were blue streaks from his eyes down to his cheeks, and his hands that finally untangled the blue strings were black palmed with red fingers and yellow fingertips. He made the strings disappear, not noticing a portal opening behind him.

"Hey Error!" Ink Sans greeted him from within the portal, as Error fell over from being startled.

"Ink! You freak! What the heck?!" Error Sans said, as he picked himself up, grumpily.

"Sorry about that, Error. I forgot how sensitive you are," Ink Sans said, as Error glared at him.

"-Sign- What do you want you rainbow freak?" Error asked, as he dusted himself off.

"Well, I wanted to see how you're doing and... ..." Ink stopped speaking as he tried to remember why he was there.

"... Hello Ink," Error said, with a bored expression.

"Hi Error! How are you?" Ink asked, as Error face-palmed.

"Why are you bothering me?" Error asked.

"Oh! We were wondering if you wanted to, you know, travel around the Multi-verse. There's still a lot of undiscovered places we could go too, and there will probably be other people who don't know you, so you'd be welcome! Of course, you'd have to behave," Ink said.

Error lowered his hand to reveal his puzzled expression, and then his eyes narrowed as he asked, "Who is 'we?'"

"You know: Me, Dream, Blue, and our new friend Dark. I think you and him might get along," Ink replied.

"Hm... I don't think so," Error said, as he crossed his arms.

"But I'm sure you two will get along. You both wear dark clothes for one thing-" Ink was interrupted by Error,

"No not that! I mean I'm not going. I'd prefer to be left in peace today."

"... but you've been here all day... and you rejected my offer to watch a movie with us yesterday-" Ink was once again interrupted by Error,

"That movie is pure garbage and you know it!"

"I know, but... you've been hanging by yourself here a little longer than usual, and, as you know, being alone for too long has pretty... negative effects," Ink said.

"-Sign- Ink... I don't know. I've been alone for so long. It's hard to start hanging out and stuff. I don't know. I still don't feel right here..." Error said, looking away from him as he placed his hand on his chest.

"Your sweater?" Ink asked.

"No, you paint bucket! Inside!" Error yelled out in frustration.

"Ooohhh. You mean where your soul is?" Ink asked.

"Yes. Something you lack," Error said, and Ink just chuckled.

"Alright. I'll leave ya alone today. But I'll be back tomorrow and I'm not giving you a choice," Ink said.

"Whatever. Fine. Just leave me alone today," Error said with a wave of his hand.

"See ya, Error," Ink said, as the portal closed.

"Tsk," Error said, as he turned away with his eyes closed.

A moment of silence followed, and Error signed.

"Wow, your friend really has patience with you," A voice said, as Error swerved around to see who was the wielder.

The voice belonged to a young female. She was tanned with one eye yellow, and the other had a faded scar of three strikes over it with a light blue eye, and a yellow scarf around her neck. Her black hair with orange ends was up in a high ponytail, with her bangs and hair on the sides of her face loose. Her shirt was light blue with yellow edges, her long pants were black with orange edges on the bottom, and her shoes had yellow strips and a light blue base

"Who are you? How did you get here?" Error asked, sternly.

"Woah man. I'm not here to hurt ya. They call me Mirror, and I came here myself. Roaming dimensions and worlds, ya know," Mirror replied, cool and calm.

"Mirror?" Error asked.

"Yeah, Mirror. With all the other Curtains out there, I need a name to distinguish myself, right?" Mirror Curtain said with a smirk.

"Tsk. Yeah. It's still strange though," Error Sans said with a raised brow-bone.

"Almost as strange as Error... or Ink," Mirror said with a little smugness in her smirk, as Error narrowed his eyes.

"What are you doing here anyway, Mirror? It's not like there's anything in the anti-void," Error asked, as he placed his hands in his pockets.

"So this is the anti-void... pretty spacious, I'll give it that," Mirror said, as she started looking around while walking closer to him.

Error stepped away from her as she came closer, and Mirror grew a bit suspicious of that.

"What's the matter glitchy dude? You're not afraid of little old me, are you?" Mirror asked, with both hands in fists on her hips, and a smile on her face.

"No! I don't fear anyone. I just... prefer personal space is all," Error said, arms crossed.

"Ah! Tsk tsk. Your arms are folded. You're in a defensive pose," Mirror said with a wag of her finger.

Error looked at his crossed arms as he unfolded them with a grumpy expression.

"Okay, there we go. Now that you're relaxed, you can take the opportunity to tell me the truth," Mirror said.

"Well... Wait a minute! Why should I tell you anything? Get out of here! This is my home, my space," Error said, crossing his arms again.

"Well don't get your sandals in a knot! I'm trying to help you is all! If you keep acting all grumpy and stuff, I wouldn't be surprised if your friend Ink doesn't come back at all soon," Mirror said.

"You know nothing about me, and Ink is not my friend!" Error said, as he turned away from her.

"Well, don't you want a friend, man? I mean, being alone isn't going to help you cause your own misconceptions could be your undoing," Mirror said, as she tilted her head to the side.

Error thought about this, knowing that she was right, and also being unable to think of an excuse from a tapping sound.

Tapping.

Walking.

Closer.

Error turned towards her as he saw that she stood a foot away from him with a smug-looking smile on her face.

"EEEEeeeeEeee!" Error screeched, as his eyes glitched and he jumped away from her.

"What's the problem, man?" Mirror asked with a raised eyebrow in confusion.

"Don't. Come. Near. Me!" Error said, as his eyes reverted to normal although his brow-bones were furrowed.

"Dude. What's up? It's not like I was going to hurt... or touch you..." Mirror said, linking his reaction to something.

"Just go away woman," Error said, on a calmer tone.

"Have you heard of haphephobia, by any chance?" Mirror asked.

"... yes," Error said, knowing that she figured out what was wrong with him.

"Ah ha! So you're afraid of people touching you huh? Sounds silly, but I'm aware that phobias can be serious, especially from your outburst," Mirror said with her hand on her chin.

"Okay! Now you know. Can you please leave me be?" Error said, annoyed.

"Dude, isolation ain't going to help you. You need some exposure... hey! I've got it! How about you come along with me to hang out, and I'll help you adjust. What do you think?" Mirror asked, with a grin.

"What? I already said that I wanted to be alone today. You should know that from eavesdropping on my conversation. I don't even know you anyway," Error said.

"Isn't that how you make friends? You talk to people you don't know yet, and then you see if you want to be friends or not. My goodness... for being a former destroyer, you've grown really soft huh? And scared too," Mirror said, turning from him to hide her smirk.

Error's eyes widened, as his brow-bones furrowed, and his fists clenched.

"I'm not afraid of anyone, and I haven't grown soft! I don't have a lot of friends because I choose not to, and I don't need them!" Error said.

"I'm sure you don't need a lot of friends, but you need someone to help you, no? Well, I'm offering to help ya since I don't have anything else to do now, and I'm sure you're gonna need it, or else you'll be just as empty on the inside as this place," Mirror said, gesturing out to the anti-void, as she turned towards him without a smirk.

Error looked briefly around the anti-void. He knew it was void of life, void of feelings, void of anything but nothingness. He couldn't stand it before, and although he could tolerate it now, the distaste towards this place was still under the surface of such tolerance. His arms stood at his sides as he signed, and said,

"Far point… Fine. Let's go."

Mirror held a genuine grin on her face, and she turned with her palm extended in another direction.

"Aw yeah, skele-man. Let's go!" Mirror said with determination as her hand glowed silver, and she circled it clockwise as an opening of silver appeared and formed into a portal.

Error was pretty impressed by this, although he didn't show it.

"Come on! Let's go!" Mirror said, as she walked through the portal.

Error followed behind her, although he kept his distance.

They first ended up in a forest near a river, as Error wondered why they were there. Mirror told him she was actually planning to go somewhere else but she gets the path confused sometimes. When Mirror was finally able to open a new path, they crossed through and ended up in a city alley.

"What are we doing here? There's garbage!" Error complained, as he noticed the garbage cans near the walls.

"Calm down. It's better if we're not seen in the open just appearing through portals. In this world, certain beings use portals so it's best if we keep that hidden so that they won't bother us," Mirror said.

"Tsk, fine. So what are we doing here?" Error asked, calmer.

"Well, the sun's near setting, so let's go out and look around," Mirror said, as they stepped out of the alley.

"Okay. Where are we going?" Error asked, as he looked around at the tall buildings.

"Anywhere. We're just hanging out anywhere," Mirror said with a shrug.

"What? No plan? Just aimlessly walking around?" Error asked, raising a brow-bone.

"Yeah. Let's just go wherever. It'll be fun," Mirror said, with a smile, as Error just pouted.

"Aww, how cute. Just going anywhere," Some random guy said with exaggeration, as he was walking with two of his friends.

"So romantic for the lovely couple," One of the friends said.

"Isn't it? Hey girl, if you want to go out somewhere, I'll take ya to the best places," Another friend, who was a monster, said.

"You know, your rudeness of entering into other conversations is irrational and quite annoying in my opinion, fools," Mirror said with an almost nonchalant expression.

"Oooh. She's tough. You got a tough girl there dude," the first guy said to Error as he patted his shoulder.

Error flinched and moved back as blue strings immediately shot forth from around his fingertips. The strings grabbed the guy's soul and held him suspended in midair.

"Don't. Touch. Me," Error said, with an aggressively serious and annoyed expression.

The two friends stepped back in fear, as Mirror was interested in the blue strings that came from Error's fingers, although they were wrapped around them as well.

"I-I'm sorry dude, sir! We were just j-joking!" The guy said.

"Oh really? Do I look like I'm laughing?" Error asked, brow-bone raised.

The random guy said nothing, too scared to talk, as his friends were as well.

"It's one thing to butt-in on other people's conversations. It's another to be disrespectful by bothering my girl!" Error said, as he tugged on the strings which squeezed the guy's soul a little as he yelped in pain.

The two friends were shaken, and Mirror's eyes went wide by how Error referred to her as.

"Please sir! We're sorry-" the monster friend said, as Error grabbed him with his other hand by his soul too.

"You've got some nerve to talk to her like that. Rude pieces of garbage! Who the heck talks to a lady like that, especially when she's with someone? Especially if that someone is ME!" Error said, as he squeezed both of their souls.

Some other people were walking by and wanted to intervene, but after hearing what Error said, they decided to stay out of it.

"You know where garbage like you three belong?" Error said with an ambiguous smile and narrowed eyes as he looked at the third friend who became pale.

Error took the two friends in his strings and used them to pick up the third friend by slamming them together, side-by-side.

"In the TRASH!" Error said, as he threw the three guys into three garbage cans in the alley that had no lids.

The strings disappeared, as the guys were struggling to get out of the garbage cans. Mirror was quite surprised, but then she yelled out to the guys in the alley,

"You guys got DUNKED ON! Oooohhh!"

"Come on, woman. Let's go," Error said, smoothing his jacket, and Mirror nodded.

They started walking along the sidewalk, Error in the lead, and Mirror said,

"Sooo, that was cool. The strings and dumping them in the garbage cans."

"Yeah, those guys were idiots. But dumping them was pretty fun," Error said, with a smirk.

"You didn't use those strings on me when I came close to you," Mirror said, hands behind her back.

"Well, you didn't actually touch me, and those jerks were asking for it," Error said.

"Oh yes, right, your girl understands," Mirror said with a small smirk.

"That's right. No one messes with me or you since your with me..." And as Error said this, he realized what it seemed like he was implying, as he looked at Mirror to confirm this.

Her smirk and half-lidded eyes were enough for him, as his cheekbones flushed dark blue and he said, somewhat grumpily,

"No! Wait! I didn't mean it as you being my girlfriend! I just meant that you're with me... not with me, but with me! Okay? Besides, what if you were my girlfriend? Those idiots got what they deserved," Error said, as he placed his hands in his pockets, and his blush slowly subsided.

Mirror smiled with a little giggle, as her cheeks turned pink. Error looked at her sharply and asked,

"What are you laughing about, woman?"

"It's nothing bad, grumpy. I just thought it was nice of you to defend me. Thanks," Mirror said.

"Oh... you're welcome then," Error said, as his expression softened.

"So, where to now?" Mirror asked.

"Huh? Well... I don't even know where I'm going-woman, lead me!" Error said, as he stopped walking to let her pass him.

"Alright, alright. Come on," Mirror said, as she took the lead.

The two explored the city. They visited various eateries since Error preferred less crowded places while Mirror was pretty picky. Afterward, they visited various stores and shops to see what was there, and eventually found an electronics store. However, random glitches began overtaking the computers and people's cellphones. As they left, Mirror realized that Error was causing the glitches on purpose, and when she asked him, he smirked in response.

The last place they went to was on a roof to view the whole city while eating chocolate bars that Error took from a small portal he created and quickly closed.

"What's the name of this so-called 'friendly-fired' universe?" Error asked Mirror.

"It's called Serentime, mixing 'Serendipity' and 'time' in one word, although I don't know why. The only one who's part of that universe is Mettaton, but he expanded the world to let wanderers or those without worlds come to live or just have fun with games and stuff. It's like a carnival world, and he'll let anyone in, but for some reason only he could use magic and abilities while everyone else can't use anything that could harm others unless they have his permission," Mirror replied.

"Asking permission to use my powers? That world sounds too friendly," Error said as he chomped on his last piece of chocolate.

"Nah man. It's cool. Your powers are just limited. Besides, you wouldn't have to worry about fighting anyone there so you'd be fine," Mirror said, breaking a piece of her chocolate and eating it.

"Hmm... so I can't hurt anyone, but I don't have to worry about getting hurt either... I might just visit that world for peace of mind," Error said.

"Yeah, you should. It'll help you relax and ease up your grumpy aggression," Mirror said, with a smile as Error pouted.

He saw that she had one piece of chocolate in her hand, although he looked away quickly so that she wouldn't notice that he wanted it. But she did, and Mirror moved the chocolate towards him and asked,

"Ya want the rest of it dude? I'm pretty full now."

"You're sure?" Error asked, and Mirror nodded.

"Alright... but don't call me dude!" Error said, as he reached for the chocolate.

"Okay, I won't, guy," Mirror said, and Error narrowed his eyes.

As Error grabbed the piece of chocolate, his hand brushed on her hand. Mirror figured that he was going to flinch or back away from her, but he didn't as he ate the last piece of chocolate. She smiled towards him, seeing that it seemed like he was becoming less afraid of contact.

"I guess you're doing better huh? I have to say, it was fun hanging out with ya," Mirror said, placing one hand on her hip.

"Really? Well, yeah. I gotta admit, it was fun hanging with ya too," Error said, a small smile on his face.

"How about we hang out again the day after tomorrow, since you'll be busy with your other friends tomorrow?" Mirror asked.

"My other friends... oh yeah. Okay. But I might come see you sooner if they get too boring," Error said, which made Mirror laugh.

"Alright. I'll be wandering around this side of the universe if you're looking for me," Mirror said.

"How about you give me your number and I'll call you, alright?" Error asked, taking out a cell phone from his pocket that he took from someone.

"Yeah sure, give me yours first," Mirror said, as she took her cell phone from her pocket.

After exchanging numbers, Error opened a portal to head back to the anti-void, while Mirror opened a portal that lead to the forest.

"Ya sure you want to go back there again? Don't want to step on your toes or anything, but it's pretty empty," Mirror asked, before leaving.

"It's the only home I know really. No one really bothers me there. At least not much," Error said, with his eyes looking downward.

"Well, alright. I'll see you soon, Error," Mirror said.

"Yeah, see ya soon, Mirror," Error said, and both of them went through their portals.