*I don't own Undertale or any of its characters; they all belong to Toby Fox, please support the original release*

Chapter 6: You are freezing!

Saturday had finally arrived, and Frisk was in her room, looking at her reflection in the mirror. The teen was wearing for the first time the dress Mettaton had gifted her for her birthday. As soon as her friend knew that she was going to the party with someone he kindly offered (*Cough-cough-stated*) to help her with her clothing, make up, hairstyle, jewellery and lots of things more that Frisk didn't even imagined existed, like "special poses for parties "or body repair and painting".

Well, there were no doubts about Mettaton's fashion sense, the dress was absolutely beautiful. It seemed like it was made exclusively for her: it was very delicate, its aquamarine shades emphasized Frisk's skin colour. The little details here and there hadn't been chosen randomly, every single one was especially made to spotlight her tiny shape.

She had to admit that it was a bit short for her taste, but her friend had insisted: "Come on Darling! Don't be so shy! Legs were made to be admired!" After that he started making poses and spinning around, gracefully displaying his legs. They were awesome, she wouldn't lie, and the way Mettaton proudly presented them made them look even better.

"Get ready gorgeous! Let's start with your make up!"- And with a last spin and a breath-taking pose he started working.

Frisk waited patiently while her friend enlarged her eyelashes, slightly coloured her cheeks covering her freckles, applied a soft shade on her eyelids, applied her the lipstick, and whoever knows what else. At first she thought she knew what he was trying to accomplish, but after a while she didn't understand what he was supposed to be doing. The sexy robot continued his flamboyant dance as he uninterruptedly tapped Frisk's face with several brushes from different sizes and colours.

Frisk was starting to think that letting Mettaton do her make up wasn't her best idea ever. She had accepted because she knew that he would be absolutely ecstatic with the idea. Making her friends happy was what she liked the most but... the star had always loved very bright and colourful makeups and, as shy as she was, she preferred more discreet ones.

Furthermore, from where she was sitting she couldn't see exactly what Mettaton was doing with her face. After a few minutes more of waiting, brushes and poses the robot gallantly stepped aside to let her admire his work.

"Oh…it's...it's…"- Frisk was speechless.

It was beautiful. The human looked spell bounded at her reflection, unconsciously bringing her finger tips to her face. The details were exquisite, perfectly outlining her features. It was made with very natural and soft colours making it absolutely delicate. The teen looked up at Mettaton who was smiling proudly by her side.

"It's so beautiful! I don't know what to say! I…I…"

"Oh, no darling, there is nothing to thank me! I tried to make it delicate because I knew you would prefer it that way, but I think that a bright red lipstick would work perfectly well on you too. With such a beautiful face you shouldn't be afraid to wear more flashy makeup, but that's one's decisions and I'll respect you, honey. Furthermore, I do this because I enjoy spending time with you, it helps me relax form my tiring super-star life"- The robot made a dramatic pose- " Even someone as spectacular like myself need a bit of rest with friends from time to time."

Frisk felt a smile forming in her lips as she softly hugged Mettaton. But as soon as her arms embraced the robot a collective "Aaaaaaaaaaaaaawwwwww" boomed in her room. Someone else would have probably jerked back, or screamed, or thought that was at least a bit strange. But, without breaking their hug the girl just looked at his friend with a questioning look.

"Dear God Mettaton, what have you asked Alphys to equip you with now?"

"Don't look at me like that honey! Everyone loves it! It's just a program with integrated voices that react to different situations: to something funny, to something cute, to drama, action, romance, and the list goes on! There are lots of possibilities!"

The excitement in the star's voice was enough for Frisk to know that she should leave the conversation there. The girl sat down again and let Mettaton work with her hairstyle. When she was starting to think that she might arrive late, the robot finished. He made her model for him to see the final result; she did the better poses that came to her mind and spun around a few times till her friend seemed to be satisfied with his achievement.

"Okay my darling! You can leave now! Go there and leave that Nick stunned with your beauty, grace and poses! I'll see how you are doing when I arrive at the party, goodbye honey!"

Frisk couldn't help to blush at Mettaton's words and waved him a very embarrassed good-bye. She got down the stairs and exited her house. Toriel had already left with Asgore a few minutes ago. When her dad knocked the door she had ran to call her mother.

After a bit more of victory dancing and smiling to her with complicity, the girl let her leave with a kiss on the cheek. When she was watching them leave they started walking arm on arm. Frisk had let out an excited scream from the doorway. The couple had turned to look at her and started laughing at the human's giddy smile.

The teen looked at the time; if they hurried they wouldn't arrive late. A few more minutes passed and she started to tap her feet impatiently on the floor. She looked straightforward to the very well decorated path that leaded to her house. There was nobody to be seen. "Sans wouldn't have made me wait…" Frisk thought as she tightly embraced herself. It was night already and it was very cold outside.

The teen surprised herself looking forward to see a bright light-blue jacket appearing in the middle of the night. She waited a bit more and started to get anxious, as time passed the night was getting darker, she didn't want to walk all the way to Muffet's party without being able to see what surrounded her. Sans was always careful enough to arrive on time to avoid walking in the darkness.

The teen felt herself frown, why was she thinking about Sans so much? She knew comparing people wasn't something good at all, but for some reason she couldn't help it. Sans had always been a gentleman with her and, without noticing, she had got used to it. She had got used to him taking care of her, of him walking by her side, of him joking all the way to their destination place.

And now… knowing that he wouldn't be the one to walk with her to the party…Sans had never forgot to pick her up, what if Nick did? What if she had to go on her own?

"No"-She said out loud- "Nick said that he would come, and he will! I shouldn't be so dramatic and negative; I have arrived late to many places too, it's something that could happen to anybody, isn't it?"

Sans looked at the time for the fifth time. It was late. Very late. And Frisk hadn't arrived yet. He knew that the girl was supposed to arrive with that teenager called Nick… but that fact didn't help to calm him down. He didn't like Nick. Why? That was the same question he asked himself over and over without finding an answer.

After thinking of any reasons and finding none, he had finally concluded that the only thing he knew was that he didn't like him. The skeleton looked back at the clock on the wall. He and Papyrus had arrived in time at the party; it was full of humans and monsters.

At first he thought that Frisk may have been around and he just didn't see her, she was so tiny that with so many people around it would be difficult to find her. But after searching for his friend carefully for several minutes he understood that she wasn't there.

"maybe they decided to go on a walk" Sans thought trying to calm himself down. That was something logical, but somehow the idea just made him feel worse. Now he wasn't just worried, he felt something that could be only described as anger. "what the hell?" He wondered annoyed. It wasn't the first time that thinking of Nick made him feel like that.

He felt angry, but not in a normal way...it felt different. "i just don't get it! why does it bother me? why does that boy annoy me so much?" While he silently wondered to himself he frowned slightly, those questions had been teasing him the last few days.

"you are jealous". The skeleton froze. The idea had suddenly popped up in his head, at first he tried to dismiss it but…

The unforeseen banging of the entrance door made Sans react. Nick had just arrived with some other teenagers and they were carelessly chatting as they entered the ballroom. With a fast glance the skeleton quickly studied the group and saw that Frisk wasn't there. Wait, wasn't she supposed to be with him? Wasn't he going to pick her up? Sans walked to the group and tried to act as friendly as he could towards the teenager.

"hey nick!"

The above-mentioned looked down at the skeleton and a grimace of disgust tinted his face.

"What do you want skeleton?"- The bitter in the last word was palpable.

Sans looked at him slightly confused. He was indeed a skeleton, but he noticed that somehow the boy was trying to use the word in an offensive way. Would he get offended if he called him human? Like, calling someone by the name of their specie was an insult for this kid, or what? He ignored him and continued:

"i thought that frisk was coming with you, weren't you picking her up?"

"Oh shit, you are right! I was supposed to pick her up! I totally forgot! Well I don't know, I think she will have to walk here on her own, it isn't that far"

" it is not that far from your house but it is far away from hers, and it's very dark outside"- The skeleton was doing his best to hold back his anger.

"What do you want me to do? I am already here! Furthermore most of the monsters of the town are here, she has nothing to worry about!"

"what do you mean by nothing to worry?"- Was the teen actually implying…

"You know perfectly well what I mean, if there aren't any monsters on the streets there is nothing to worry. With all your magic and stuff, you are the truly dangerous here"- Nick's voice was full of contempt-"I don't care how nice or friendly you try to look, you cannot fool me"

Sans made his very effort to supress his fury. If he started arguing with the brat about his statement he wouldn't be able to know what really mattered to him.

"does that mean that you are going to let her come, at night, with the cold, on her own?"

"Of course I am! You are nobody to tell me what to do! Do you think that I care about…"

But Sans wasn't listening anymore, he was on his way to Frisk's house. If that stupid of Nick was going to let the kid come all the way to the party on her own he would pick her up instead. When he was halfway to the girl's house he saw a tiny silhouette walking down the street. He hurried towards it.

" kiddo is it you?"

The girl slowly looked up at the skeleton.

The monster stared at her, astonished. With that dress, makeup and hairstyle she looked way different than what she always did. He had never seen her wearing anything else than comfy sweaters and her hair was always loose, she limited herself to pull it to the back of her left ear when it got to her face.

Sans recognized the dress Mettaton had gifted the human for her birthday and suddenly noticed that she wasn't wearing any type of coat. Her arms and much of her legs were directly exposed to the cold of the winter. All her body was uncontrollably shaking.

"Sans?"- The teen asked, confused

"frisk you are freezing!"-She was worryingly pale and her limbs seemed to be a bit rigid. Sans quickly took off his jacket and covered the girl with it.

"Wh-what are you doing here? Has anything happened to Nick?"

The skeleton was going to answer that yes: Nick happened to be a stupid. But when he looked into Frisk's expectant and worried eyes he understood that knowing that the boy was a stupid may disappoint her. She was already suffering enough because of the cold and Sans decided to soften the things a bit.

"he is ok, don't worry. he just had some…troubles and couldn't pick you up. that's why i came, but i'm sure he'll be at the party when we arrive"

Frisk sighed as a wave of relief washed over her. In the past quarters of hours she had gotten very angry with the teen, then very worried, then very angry, and vice versa. Knowing that he didn't came because he couldn't, not because he forgot about it (yeah...), and that he was okay made both feelings disappear. She looked at Sans with a very fond smile.

"Thank you for coming Sans! I'll be honest with you, I think I have never missed you so much as I did in my way here"

And she was saying the truth; she had thought how much she missed the skeleton's presence countless times while she walked to the party. The girl looked up at Sans and noticed his worried expression.

"Hey I'm okay, don't worry! I have your jacket now!"- But as soon as she spoke she couldn't hold back a sneeze.

"yeah, sure, you're perfect"- The skeleton said frowning slightly.

He reached out and placed a bony hand on her forehead.

" you don't have high temperature for now, you are just too cold. i think you should go home and drink something hot, have a bath and go to sleep, that would make you feel better"

"Nooooo! I want to go to the party!"- She sneezed again- "Look I will just cover myself very well with your jacket and I'll be just fine! See?"

The girl huddled deeply in the light blue jacket and pulled up the fluffy hood. It was way too big for her, so she looked like some kind of flamboyant and cute Dementor, a very warm one. Sans chuckled softly.

" yes i can see, but i don't think you can"- He softly pulled up the hood a bit so he could see Frisk's face.

They stared at each other for a few seconds. Frisk did really want to go to the party, and Sans did really wanted her to take care. Their mute discussion lasted till Frisk's cheeks puffed out and her eyes glittered with determination. The skeleton sighed and started walking towards Muffet's as Frisk silently celebrated her victory. But, even after walking several blocks, the teen hadn't stopped shivering. Although Sans' jacket was one of the most warm clothing the girl had ever wore it didn't seem to be enough.

"kiddo', you are still trembling like a leaf"- The skeleton stated looking down at his friend- "come on let's head back"

"Nooo! Pleeeease Sans! I really want to go! I have been waiting for today a lot! Everyone is at the party, I wouldn't like to miss it! There has to be a way to warm myself up!"- The girl gave Sans a supplicant look as tears started to prickle at the corner of her eyes.

"ok, ok don't give me that wet puppy look, let me think"

As the skeleton was thinking of what he could do to help the human, the tiny, shaking girl leaned her back against her friend's. A few seconds passed and they still hadn´t come up with anything, but Sans suddenly noticed something.

"hey you aren't shaking that much now"- He turned to look at Frisk over his shoulder.

"Yeah, I'm feeling a bit better. Your back is warm"

"wait, that's it! come here, i have an idea"

The girl reluctantly pulled herself away from his friend (she had gotten comfortable) and stood by his side. The skeleton softly embraced the girl's shoulders with his right arm and gently pulled her closer. After blinking a few times in confusion Frisk finally understood what Sans was trying to do. She cuddled in his embrace as she felt the skeleton's warm chest behind her.

"Waaaaaaaaaaaaaaarm"-Frisk's voice was full of relief.

Sans chuckled slightly, making his ribcage vibrate against the girls back.

"it seems it works, doesn't it?"

"Yes! Thank you very much!"

They resumed their walking to the party without breaking their embrace. Frisk felt very conscious of Sans proximity, he had never been that close before. Well, maybe that time when she had fallen from the roof of the house and he had caught her, but this time was different.

She knew that a soft blush tinted her cheeks and there was nothing she could do to stop it. The girl felt that well know sensation of soft tickles in her stomach that only Sans could produce on her. She had felt it many times before, when he made her laugh, when he smiled at her with his charming smile, when she saw how caring he was with her… but she had never felt it as strongly as she did now. She knew what it meant, but she just tried to ignore it.

Maybe if she didn't pay attention to it would disappear one day…nah. She couldn't fool anyone, she knew that it would still be there, it didn't matter how hard she tried to deny it. Their relationship was so nice and unique; she didn't want to spoil it or make it awkward, so she decided to keep her tickling stomach topics to herself.

She tried to get distract focusing on the skeleton's white comfy turtleneck. She knew that Sans wore it because it poked out of his jacket, but she had had just a few chances to see it completely because the skeleton wouldn't take off his coat very often. The girl felt surprised that the skeleton's ribcage didn't felt too sharp on her skin. Sans was a skeleton (OH DEAR GOD, REALLY?! I WOULD HAVE NEVER IMAGINED!) and she had always thought that the edges of his bones would be more protruding.

As she leaned against him she couldn't help to notice that she could feel something else than his bones, like there was something beneath them: something supporting his skeleton from the inside. It felt like the sensation of touching someone's skin, it was warm and somehow solid but it seemed to be less corporeal.

The girl had the certainty that if she introduced her hand between Sans' ribs these "mysterious support" wouldn't stop her. While she was wondering about her friend's functioning she could feel his chest going up and down rhythmically. At first she didn't pay attention to it, but then she realised…

"Wait a minute, do you need to breath?"

"if i what?"- Sans gave Frisk a very confused look.

"Oh sorry! I didn't mean to say it out loud! I just noticed your chest going up and down and I felt surprised, I thought that without lungs you wouldn't need air to sustain yourself! I'm sorry, I was just curious and…"

"hey, hey calm down kiddo', it's ok. i'm not angry at all, you just took me by surprise"-He soothed the girl- "it is an unusual question, how would you react if somebody asked the same to you?"

"Well… yeah I have to admit that it is a weird question"-Frisk said giggling- "I have breathed all my life, if I didn't I would have died. That applies to everybody who breaths, that's what you are taught in school. So it is a bit obvious that if you breathe, you need to"

"actually, i don't"- Sans replied merrily. He couldn't avoid laughing when he saw Frisk's "my whole life is a lie" expression- "ok, ok let me explain a bit. i can breathe but i don't have the necessity to do so. if, for any some reason i just decided to stop doing it..."- His breathing stopped- "nothing would happen".

"Wh-what?! But-but that doesn't make any sense! What is the purpose of breathing if you don't have to?!"

"everybody was breathing, i just wanted to be popular"

Frisk roared with laughter at the skeleton's unexpected response. The couple kept laughing for about two blocks before being able to speak again.

"Oh my, Sans! You have to be joking!"

"of course not! when i was a kid i felt curiosity about how breathing would feel like. i saw nearly every single monster doing it, so i tried it out. before i could notice i got used to breathing and now it's a habit. papyrus breaths too, he says that it makes him even cooler"

"But how can you breathe without having lungs? - Her voice was a mix of amusement and interest.

"mhh… i'm not very sure. i just know that i can feel the air whirl inside my ribcage as it comes in and out, but i don't know how it works exactly. i think it has to do with the magic that we monsters have"

"And how is it that your bones keep attached together?"

"magic"

"And how is it that you have body heat without even having skin?"

"magic"

"Sans, if you want me to stop asking just tell me. You don´t need to systematically answer "magic" to all my questions"

"i have no problems with your questions! but i'm afraid that magic is the only answer i have to them!"- Sans smiled at Frisk's frustrated expression- "look"

With a quick movement the skeleton pulled up the sleeve of the sweater from his free arm, uncovering it till the elbow. Frisk looked mindfully at her friend's arm, appreciating every detail, from the little bones of his wrist and hand to his radius and ulna. It didn't matter how hardly she focused on the joints between his bones, she couldn't see anything holding them together.

There were gaps between them but somehow they kept in their place. But when the girl was going to ask some more questions Sans suddenly grabbed his right hand by its wrist and disengaged it with a dead CRACK.

" HOLY MOTHER NATURE, PUT IT BACK!"- The girl stared as Sans waved and playfully wiggled his fingers at her with his detached, bony hand- "PUT IT BACK! PUT IT BACK! OH MY, PUT IT BACK!"

The skeleton laughed out loud at the girl's reaction and did what she asked, reattaching his hand into place with a new cracking sound.

"ARE YOU OKAY? DOES IT HURT? NEVER DO THAT AGAIN, UNDERSTOOD?!" -Frisk quickly took his friend's hand into hers and examined it carefully in search of any injuries or whatever could be out of normal, but she found nothing.

"hey don't panic kiddo', i'm ok"- He flexed his fingers to prove his statement- "it feels like new"

The girl looked at Sans and then at his hand repeatedly, utterly confused:

"I-I just don't get it! H-how?"

"if you had to answer that question, what would you say?

The teen sighed in defeat- "Magic, I suppose"

They looked at each other silently for a few seconds before they burst out laughing. They spent all the way left to the party laughing, giggling and making bad bone puns. They were so distracted that they didn't notice they had arrived till they were literally facing the front door of the ballroom. Sans reached out to open it but was cut off by Frisk's soft voice.

"Sans…"

The skeleton looked down to find her huge beautiful eyes looking fondly at his.

"Thank you so much for this, I was feeling a bit down, but as soon as you appeared…"- She leaned a bit more against him and hugged him softly- "Thank you"

Her voice had been just a quiet whisper, but it was enough for the skeleton to hear. He gently hugged her back, resting his chin at the top of her head. He had to wait a few moments till he was able to speak again:

"there's nothing to thank me frisk, i help you because i like to do so. the mere fact of having you around is enough for me"

The skeleton blinked a few times, surprised. The last sentence that had left his mouth wasn't planned, it was something true, but it had just unexpectedly popped out. He didn't express his feelings towards others so openly very often and he knew that Frisk would instantly notice his "affectionate slip".

The girl stayed still for a bit, her friend's words slowly sinking in. She softly shuffled in his embrace and stared directly into his eye sockets. Frisk was extremely conscious of what those words meant, especially in someone as reserved as Sans. By the skeleton's surprised expression she understood that he was as surprised as she was because of his own words.

"For me too, Sans"- The girl said smiling at him sweetly.

They stayed like that, their eyes laying on each other's for a long moment. They got suddenly brought back to reality when a very old and grumpy lady wanted to get into the ballroom and couldn't because they were standing right in the middle of her way.

The couple quickly stepped away from each other and muttered lots of apologies as the woman walked through the door muttering something about the youth of those days, that they didn't respected beautiful ladies like her and that in her times lovebirds were at least a bit more discreet, that they were bad-mannered, gross, criminals and yada yada yada. The door closed behind the eccentric and dramatic woman and her complaints couldn't be heard any more. The friends look at each other, ashamed, until Sans broke the silence:

"should we feel bad for been called criminals by an old "beautiful lady"?"

"Well, I think we are a shame for this society"

They gave each other a very serious look and then roared with laughter. They had to wait till their rupture of giggles stopped before getting into the ballroom. After panting slightly and whipping some tears of laughter they recovered their composure.

"it's already very late, nick may be waiting for you, shall we get in?"

"Yeah, sure!"- Frisk assured as she walked in by the skeleton's side. What she didn't tell him was that, until he had named him, she had absolutely forgotten about Nick.

Hello! I'm back, sorry for the delay! This was going to be the chapter of the party but…well… I kind of got distracted in the way to it (literally) Sorry, but they are in the party now! It's a progress, don't you think? Just a bit more, darlings! Thank you for all your support! When I first started writing I thought that nobody would read my story, but then you appeared! Every follow, fav and review is unique for me! THANK YOU SO MUCH!

PS: The so lovely Dementors don't belong to me, they belong to J.K Rowling, please support the official release. (And try to stay away from them, unlike our little human they are not warm nor cute at all)

Updating soon!