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

Chapter 3: What the hell is going on?!

Frisk walked at a rather quick pace, it wasn't as cold as it had been before. It wasn't snowing anymore and the sun was high, bathing the girl with its rays. The teen was starting to feel hungry. Some hours had passed since she had breakfast and the idea of a warm meal in Grillby'z made her stomach rumble.

When she finally arrived at the restaurant she recognized many familiar faces that happily greeted her. She gifted them with a huge smile in response and shyly waved at them. Frisk then hurried to the counter and took a seat in the usual place, where Sans and her would share their meals. The skeleton hadn't arrived yet, and she couldn't help to feel a little sorry for him.

She knew how much Sans hated helping with the chores, and knowing that he was now cleaning a giant burnt mess in his kitchen…"Well, we are talking about Sans, I don't think he is working sooo much"- the girl thought in a more realistically.

As she was wondering she didn't notice when someone started to look at her. Well, actually stared at her. She just reacted when he stood by her side, a gallant smile on his face.

"Hello, is this chair empty?"

Frisk looked up and blushed a little:

"Uhh…I'm waiting for a friend, but he hasn't arrived yet…"

"Oh great! Can I seat then? Till he arrives, of course"- And without waiting for a response he gracefully sat by her side. "My name is Nick, what's your name?"

"Nice..nice to meet you! My name is Frisk!"

Sans walked slowly towards Grillby'z. He would have preferred to use one of his "shortcuts" to get there, but Papyrus had insisted that he should walk more and blah blah blah. The shorter skeleton agreed just to content his brother, after all, making him happy was, indeed, worth it.

It took him twice as long as it would have taken a very old lady with a stick to arrive, but he did. But as soon as he entered the restaurant he saw someone else sitting in his usual spot next to Frisk. He decided to stand by the doorway, to see if he could recognize the human or monster, but he couldn't. It was someone he had never seen before, a very handsome teenager, more or less Frisk's age, with short, jet black hair and deep blue eyes. By he could estimate with some quick maths the boy was two heads taller than his friend, which meant he was one and a half head taller than the skeleton himself. He was smiling cockily at Frisk, who was blushing as she laughed merrily.

The skeleton felt kind of strange, he had seen Frisk laugh nearly every day since he had met her. Most of the times because of his puns, of course: the girl really seemed to enjoy them. He remembered that one day he suspected that she feigned she laughed at his puns just to make him feel happy (he actually couldn't understand why someone would need to feign that his puns were funny, but anyway) so he tested her.

He started saying the worst puns that came to his mind, like: "I wondered why the baseball was getting bigger, then it hit me ", "What did the wall say to the ceiling? I'll meet you at the corner", "Have you ever tried to eat a clock? It's very time consuming" or "What does a house wear? A dress". The girl laughed with every single one, but at the point he said: "The one who invented the door knocker got a No-bell prize" and his friend felt to the ground tears of laughter rolling down her cheeks and fists pounding the ground the skeleton accused her:

"oh come on kid! you just cannot be laughing at that! they are the worst puns ever!"

A few minutes passed till Frisk could answer, although she was still laughing:

"That's…haha…exactly..pffftttt …of what I'm laughing about!"

Sans looked down at her giggling friend.

"so if a pun is good you laugh because it's good and if a pun is bad you laugh because it's bad?" - the skeleton's words were slightly tinted with repressed chuckles. The girl's logic was kind of weird, but he actually liked it. Furthermore her laughter was very contagious.

At the end both of them where laughing nonstop in the middle of the street. Some people that passed by looked at them as if there were absolutely crazy, but most of them sympathetically smiled and one or two even laughed a bit at such a joyful display.

That said, it was obvious that Frisk loved having fun and laughing, especially with her friends, or liked making them laugh instead; Toriel, Alphys, Papyrus, Asgore, Mettaton, Napstablook, and even the though Undyne spend funny moments with the tiny human. Sans had saw her having fun with lots of people, but our skeleton had never felt something like this before.

When he saw her laughing with that boy…well and why was she blushing that much anyway? To be honest, he really wanted to go where they were, oh so happily chatting, and sit right between them. He gave a step forward and suddenly stopped himself. Although what he had just thought had seemed good in his head he knew it wasn't ok. And why had he thought of it in the first place? What the hell was going on?

"Oh look, there's my friend! Heeey Saaaans!"

The skeleton jolted up at Frisk's sudden call. He quickly recovered his composure and gifted his friend with one of his usual cheeky smiles as he walked towards her.

"hey frisk! sorry for the delay, pap wanted me to walk here. I think I completed my quota of good actions for today. "- the skeleton said, playfully winking at her

"Aaaww, that was so nice of you! Your brother must be very happy!"- The girl said giving his friend a very softened look.

Sans shrugged slightly, hand in his pockets, and looked at Frisk's new "friend". The teen then proceeded to introduce them:

"Sans, this is Nick, he is new in this neighbourhood. He arrived yesterday and lives near Mettaton's building. Nick, this is Sans, he is the one I talked you about, he lives just a few blocks away from here"

"Sup' Nick"- Sans greeted him, as he outstretched his hand to shake the teen's.

Nick slowly looked at the skeleton from the soles of his comfy, pink, fluffy slippers to the top of his skull before stretching his hand and greeting him with a quick hands shake.

"Nice to meet you Sans"- His voice sounded slightly sharp as he said these words. And the short skeleton didn't like it.

"Oh, look at the time! I should be going or I'll be late to the meeting with my band! – The sharpness disappeared from his voice as he talked to the girl- "Frisk, will you come with me then?"- The boy asked as he stood up.

"Uhh…yeah! I would really like to go, I don't think my parents won't let me"-The girl answered, a slight blush colouring her cheeks.

"Okay then! See you on Saturday!"

"See you!"

Nick gave Frisk a final gallant smile, but as soon as she turned around his gaze shifted to Sans and his "beautiful smile" disappeared. They both stared at each other for a few seconds before the teen finally left the restaurant.

"Hey Sans, why didn't you do the whoopee cushion joke on him when you shook hands? I thought you did that every time you met somebody new"

"uh? oh, i think I forgot"- The skeleton answered flatly, as he took his seat next to Frisk. "have you already eaten?"

"Of course not! I was waiting for you, remember?"

Frisk gave Sans a concerned look. Something in his behaviour seemed kind of…odd.

"Sans, are you okay?"

The short skeleton looked up and noticed the look his friend was giving him. He didn't want to make her worry, after all, he was feeling a bit weird but even he himself couldn't understand why, so he hurried to calm his friend down:

"yeah kiddo, i'm just a bit tired. it has been too much work for me for one day, ya' know? but don't worry about it, i'm fine."

Frisk looked intently at him, her eyes locked in his eye sockets. Every time the kid gave Sans that look he felt like she was staring right into his soul, like she could know exactly what he was thinking, if he was lying or how he was feeling. He knew that she was going to complain about him lying to her.

He hated having those discussions with the human. To be honest, he didn't like having any arguments with her, she was someone he really appreciated and he always tried to avoid having any troubles with her. But he wasn't worried about that now. Actually, he wasn't even thinking about that, he was, for the first time too distracted to notice the possibility of an argument.

He was too busy looking at Frisk's profile. He was so used to seeing her nearly every day that he felt surprised he hadn't noticed how long and slightly curved her eyelashes were. The skeleton was so absorbed by his new discovery that he didn't react when the teen started talking.

"Sans, are you sure? You have been acting strange since you arrived"

The aforementioned looked at the girl's eyes and saw that her eyes weren't entirely honey-coloured as he had thought; they had little blurs of darker brown here and there. Had they always been there? Then why hadn't he noticed before?

"Sans, are you even listening to me? Don't tell me that you were too lazy to close your eyes again and you are sleeping with them open"

The skeleton looked carefully at the little wrinkles that appeared in her skin with her expressions. Although the teen's forehead was slightly covered by her bangs he could see some expression lines quickly forming across it and gathering in a soft frown.

"Hey Sans! Is anybody there? "

Just when the girl snapped her fingers a few times right before his eye-sockets the skeleton reacted. He blinked a few times and looked at Frisk slightly confused.

"huh?" -He muttered. What had happened? Had she said anything? It seemed that working that much had really affected him.

"Oh my, you are impossible, never mind"- the girl sighed as she rolled her eyes.

In that moment Grillby arrived and stood in front of them behind the counter.

"as usual grillby"- Sans said causally , and a few minutes later two delicious hamburgers were placed before them.

"Hey Grillby you forgot the ketchup!"- Frisk said waving at the flaming monster.

He looked at her and shook his head in return. Then he accusingly pointed at Sans.

"I won't give it to him! I just want some in my hamburger!"- The girl tried.

But Grillby knew them far too well by now. Every time Sans came alone to his restaurant he would usually hide the condiments somewhere safe so he wouldn't drink them all. But when he came with Frisk the girl usually asked him for some to put in her hamburger. At first he gave her the bottles of condiments; every costumer should have a good service, after all.

He saw that the teen put just a few drops of ketchup on her hamburger every time, but somehow when she handed the bottle back it was empty. Not a single trace of ketchup inside. This happened every day they came, which was very often, and Grillby was tired of buying tons of ketchup to satisfy all his costumers aaand Sans. So he had decided that for now on, the couple would be vetoed of ketchup.

"c'mon grillby don't be so scrimp! a lady here is asking you for some ketchup, I thought you were more of a gentleman!"

But the barman didn't seem to be going to change his decision. He placed his hands on his hips and gave them a look that clearly meant "I know what you two are going to do and you are not fooling me this time"

"Okay Grillby you win, I was going to give the ketchup to Sans, but you know that he loves it so much! Please!"

Sans looked at the Frisk and quickly caught up with what she was trying to do.

"yes grillby, we are finally admitting our condiment crimes and asking you politely! please!"

Both friends drew together and made their best puppy faces as their begged in unison

"Pleeeeeeeeeeeeaseeeeeeeeeeeeeeeeee!"

The monster looked at the couple for a few seconds before the flames in his head bulged and then shrank a little in a defeated sigh. One thing was to have Sans making his wet puppy face, or Frisk, but another completely different was having both of them doing it at the same time. It was just too much for him to bear. He slid the ketchup bottle down the counter and it stopped right in front of the duo.

"Yaaaay! Thank you Grillby! We love you!"- Frisk said with a huge smile.

" oh don't be so dissembled! we know you love us too grillby!"-Sans teased as he opened the condiment's bottle with a bony hand.

Grillby shook a hand at them like saying "Yeah, yeah whatever" and continued cleaning glasses. After a few bites to his hamburger Sans remembered that there was something he wanted to ask Frisk.

"hey kiddo', to what place did you agree to go with that nick? i got kind of curious"(Yeah, curious)

"Oh yes"-Frisk said her face turning slightly pink- "he invited me to the dance party in Muffet's café this Saturday. He says that every human and monster in the city is invited and he asked me to tell as many people as I could. You can go alone or with someone, you choose."

"and i suppose you are going with him, aren't ya'?"

"Uuhh..yeah, I think so."

"cool"- The skeleton managed to say, as overprotective as he was. Toriel had told him many times that Frisk was very intelligent and could take care of herself, so he did what he could to leave the girl her space. He promised himself that he wouldn't take action unless he thought Frisk was committing a mistake, and although he didn't like that Nick so much she seemed to like him. So our skeleton decided to shut up.

Frisk noticed his friend's flat answer, but she considered it as part of his odd behaviour of the day.

"Are you going? - The girl asked curiously.

"going where?

"To the party, you lazy-bones!"-Frisk said as she friendly punched his shoulder.

"i dunno' frisk, parties always make me dead-tired"

"Oh come on"-The girl said giggling a little- "I would really like you to go"

"aren't ya going to be with nick?

"Yes but I'm not going to be with him all the time, plus you are a lot more humerus"

Frisk felt surprised as his friend's face lightened up a bit with her last words.

"ok, if you say so i think i'll have tibia prepared for saturady then"- The skeleton said as he lazily winked at her.

"Great! I hope to see you there! It is at 9:00 P.M, you can bring Papyrus if you want too! I think he would really enjoy it"

"yeah, I'm gonna' tell him too"

Frisk smiled as she finished eating her hamburger, she thought that it would be a bit more difficult to convince Sans to go. But the skeleton had agreed! She knew that it wouldn't have been the same without Sans there…and actually, a few days later she would fell very glad of inviting him.

Hello! I hope you liked this chapter! I think the development of these events will take me one or two chapters more than I expected my apologies! When I start writing, ideas start to pop up everywhere in my head and I have to be very determined to keep track on the story. Thank you for your reviews, favs and follows, every single one encourages me to keep going! You mean a lot, really!

Updating soon!