I think I've kept this gender neural so I'm going to try keep it that way
Sans pov

I was annoyed mostly because Y/N's dad had found them. I actually wanted her to never be found. I was getting use to them being around.

It was late at night and me and Undyne  were on watch. Undyne had to walk about the house making sure no one broke in and I  had to watch Y/N. I knew he had been chosen on purpose to do it just to annoy me. Why does everyone think I like her

Well Y/N does look cute when they were asleep.

Wait what?!

Your pov

You were being chased you didn't know what from. All you knew was you were being chased.

Your voice wouldn't work. So you couldn't call for help.

Your eyes wouldn't stay open. You always found yourself running into things.

Your legs were like jelly. You would run for a bit before falling over and won't be able to get back up.

You tried to scream. But nothing happened.

You called for help.

But
N O B O D Y  C A M E

H A  C L A S I C  N I G H T M A R E

Your eyes shot open you sat up panicking. Sans was immediately by your side "Y/N are you ok?"

Without thinking you hugged him softly sobbing. Sans sat down on your bed and held you close rubbing your back to calm you down "bad dream?"

You noded. Sans pressed his teeth against your forehead. Once he moved away you looked up at him "is that your way of kissing"

Sans was blushing. You soon were too "uh yeah" he muttered. You smiled.

Sans moved you chin so that you were facing him before pressing his teeth against your lips. (Don't worry no tounge thing) you kissed back.

You then pulled away blushing. Sans was also bushing. You heard the door creak open. You quickly pushed Sans away and looked over at the door Asriel stood there.

"What are you doing?" Sans asked. Asriel stayed by the door "my mum sent me to make sure you weren't doing anything inappropriate"

"Why would Tori send you"

Frisk poked his head in "sorry for the immature song but anyway" he took a deep breath in and ran off singing "Sans and Y/N sitting in a tree K-I-S-S-I-N-G. First comes love. Then comes marriage. Then comes baby in the baby carriage"

Asriel still stood there "ah bye" he ran after Frisk. "Oooh if only the humans would allow me to have my show up here. Ever one would know about this now" Mettaton laughed.

"Shit!" You guessed the person who just yelled was Undyne "Undyne what did I say" Toriel called back "how often does this happen?" You asked. "At least once a week" Sans got up you followed him.

Undyne stood by the door holding a spare "the humans are planing to break in" She swiped her spare at the air "I suggest we fight"

"If a human holds someone hostage normally the police might try bargain for them. You could walk outside holding onto me. Tell them what you want. Once you get it you let me go then I could run away from home and come back here...."

Sans looked at you "don't you want to go back?" You shock your head "my parents are nice. My dad's just over protective. Any way I like it better here"

P E R F E C T

If Sans had lips you geussed he'd be smiling now. A thing that looked like a dog skull appeared from no where and hovered over the ground.
You looked at it not sure what to think if it "what's that?" You asked. "A Gaster Blaster" Sans awnsered. Frisk walked over and saw it "you use it to beat up humans but your to lazy to help with a killer flower" Asriel came round "I could use my Chaos Blaster!"

Frisk snorted "you told me you didn't know how to get it any more" Asriel laughed "I was just joking.."

Frisk laughed "come on Asriel lets got 'eat' the lovely food Papyrus has made for us" Frisk pulled Asriel away. Sans looked back at you "you could give me back if the give monsters equal rights" you suggested "that way you don't need to steal from the humans and give it to the monsters. That sounds like robin hood. Any way that way monsters can get a job. They could live life like they did in the underground but on the surface"

Undyne snorted "it's no fun that way" Sans looked at her then to you "Well ok.. if you think it will happen"

Y O U  T H I N K  THIS  I S 
S A V I N G  T H E  M O N S T E R S

Sans held your hoodie and led you out. You hadn't been outside in ages. The last time you were let out it didn't go so well.

Sans' pov

I expected them to run away. They didn't. I made The Gaster Blaster float behind them. They looked scared and weak.

They were a good actor.

Your pov

You spoted your dad straight away. If you didn't have to act frightened you'd be holding Sans' hand.

You show your dad that monster were kind. That they didn't go about killing humans. Monsters were more human than they were.

Sans told them what he wanted before pulling you back inside. "You look nervous" Sans put his arm around you. You smiled "just don't like acting afraid of you. You are actually quite nice"

Sans pushed his teeth against your forehead "could say the same about you doll"

Every one was rather calm. Undyne, Sans, Asgore and Mettaton took turns watching. Asriel kept saying he could help. Frisk had said "Not with out those human souls" you asked him what he ment by that and you got the same awnser "long story"

It had gotten late. You lay on the couch watching kissy cutie new mew with Alphys. You hadn't heard of it before. But you already loved it.

Once Undyne had finished her shift and swapped with Asgore she changed it to a horror movie. You hated them.

(Sorry if you love them. Cause I love them as well as horror games and creepypasta. I've played FNAF at midnight and not jump at the jump scares)

Sans sat next to you. Most of the time you were hugging him with your bad to the tv. You had over heard Undyne joking about horror movies being the best first date movie. You now knew why.

Yay another long chapter. I'm getting use to writing long ones.