You speeded up to robin

"(Y/n) help! She just jumped!"

"Tie this rope to that stalagmite"

"Mhm Okay"

Robin tied one end of the rope around the large pointy rock in the floor as you threw the other half into the hole

"CAN YOU GUYS CLIMB UP THE ROPE?"

You waited a second until you heard a echoing reply

"Both of us are injured and can barely walk,can you come down,there's a light it may lead to the exit"

You looked over to robin who gave a confirming nod,with that you both grabbed onto the rope and lowered yourselves down into the gaping hole...

*snap*

"Aaaaaaahhhhhhh"

"HOLY FUCKING GRANOLI WE ARE GOING TO DIE!"

the rope had snapped and you were falling for your life into the dark abyss below...

*thud*

You landed with a thud and blacked out immediately....

"You think she's awake now?"

"She's strong but she did land on the rocky ground of the cave while we landed on the flowers"

"If she's fucking dead I swear I will hate myself for the next five year"

You began to awaken,turning and facing the direction the voices came from

"Only five years? I'm offended I thought it would be at least seven"

"(Y/N)!"

"Sheesh ya' scared me dipshit"

You looked around,analysing your surroundings,you seemed to be in a bed of some sorts,did your friends find their way out and carry you back to the orphanage?

"So where are we,Orphanage?"

Robin turned to answer you,but what she said was...surprising...to say the least...she and the others explained to you that they had been found by a goat monster and that he lived in this house in the ruins of the underground,you stifled a laugh until you glanced to the side to see an actual goat man holding a cup of tea on a little tray

"I thought you might like some tea,my child"

The goat man offered you his cup of tea and you polite fully declined,too drowsy to be able to eat or drink right now

"Hey,um,I know I just woke up and there's a hell of a lot more explaining to be done and I should probably be freaking out about the existence of monsters but right now I'm kinda just tired,can I go back to sleep"

"Of course my child,robin,you may sleep in here on the other bed while cooper and Wallace can take my other spare bedroom"

"Got it"

"Okie"

"Sure"

While saying that,the rest of your friends all went to their designated beds and went to sleep,being the lazy ass couch popato chisp you were you fell (pun intended) asleep instantly,letting the darkness slowly consume you...

Timeskip to the next day:

"(y/n)"

...

"(y/n)!"

...

"(Y/N)!"

You awoke suddenly,the sound of robin yelling your name had stolen you from your slumbers

"What"

"I dunno just got bored"

"..."

"BITCH I WILL CUT YOU-Wait a second Where is my weapons and supplies bag"

"Oh,yeah,asgoro the toro put it under the bed next to a new set of clothes,you should put them on before going to breakfast,I'll meet ya in the kitchen,bye"

And with that said robin swiftly exited the room,you poked your head under your bed (I'm a poet and I didn't even know it) and found a white tee shirt and a pair of black tights,you put them on and then put your signature long brownish red jacket overtop

You walk out of the bedroom and into the living room where cooper sat in a big chair with a book by the fire and robin was in the kitchen,despite her reckless behaviour she wants to be a pastry chef or decorate cakes someday,she was probably helping out with asgore on the breakfast

Wallace was waiting patiently at the table when you walked in,you took a seat next to him and the others soon joined,asgore brought a large cinnamon butterscotch pie with him and placed it on the table on a mat to stop it from burning the tablecloth

The pie smelled amazing,you took a bite of the piece you had been given and felt instantly rejuvenated,you finished the pie and thanked the goat man,you then turned to him and asked him a question

"How do we leave the underground,and if we do,can we ever return"

"Oh,um,well,why would you want to leave,why can't you stay forever,I know you probably have families but-"

You cut him off

"No,we don't actually,we are all orphans,I don't want to leave,not really,I was just curious,I do want to stay with you forever,this place just feels small"

"Oh! You really mean that,well my child,it feels small because this is only one fourth of the underground,there is much more out there,but it is dangerous"

"I have weapons and I can protect myself,I will return I just wanted to know if it was this small,so,is there anything you need help with?"

"Oh well since you are so open to the idea of leaving the ruins but only temporarily,do you think that maybe you could go shopping,if it's too much to ask I understand"

"Sure,just give me some money to buy stuff with and a list and I can go right away!"

"Okay the nearest town is Snowdin,just be careful of the skeletons and alphys and especially Toriel and you will probably be fine"

"Got it"

Asgore hands you what you need and you tell the others where you are going,cooper offers to go with you and you accept even when Wallace wants to be the one to follow,knowing that it was probably too dangerous to go alone,you take your throwing knife and leave the rest in the bag under your bed,not wanting to lose anything

Asgore guides you to the ruin doors and wishes you a safe trip,you and cooper both step into the snow and instantly begin to shiver

"How is is this damn c-Cold down here,it's snowing f-for fucks s-s-sake"

"I don't k-know,let's just get to s-s-snowdin"

The two of you walk down the snowy path until you come across a large stick

"Can you pick it up?"

"Nah it's too big and heavy"

Cooper nods and you both continue upon until

*crack*

You and Cooper whip your heads around to face the stick,only to see that it has been shattered

"Nope,nope,nope no thank you fuck this shit I am out,goodbye"

You and cooper speed walk until you come across a bridge with large bars too big to stop anything,you then hear footsteps behind you,frozen in place by both fear and cold,you stand there until...

"Humans"

"Don't you know how to greet a new pal?"

"Turn around and"

"Shake my hand"

You slowly turn around while robin darts behind you,holding on to you for dear life,you reach out your hand to the shadowy figure when...

*bbbzzzzzzzttt*

"Fucking crist,ouch!"

"Heh,the ol' joy buzzer in the hand trick,it's always funny"

"..."

You look up from your hand to see a strange skeleton monster

"I'm papyrus,papyrus the skeleton,I'm supposed to be on watch for humans right now but I honestly don't give a shit,my brother on the other hand,he's a human hunting fanatic,when he finds out that there are two-"

"Four"

"Huh? Where"

"The others are waiting for us"

"When he finds out that FOUR humans are in the underground,well you better watch out coz I don't think ya wanna know what would happen then...well...I don't know what he'll do but it will be not so fun for you"

"W-Why are you hunting humans,if you don't mind me asking"

"Hmm,polite,that's gonna get ya killed down here,anyway yeah we need seven human souls to cross the barrier"

"Well fuck that,I'm out,I ain't got time for this shit,bye"

You grabbed onto coopers hand and trudged off through the snow,walking until you hear voices up in the distance,you hide behind a conveniently shaped...bush...and tug cooper behind you

"PAPYRUS,WHY ARE YOU SLEEPING AT YOUR POST AGAIN!"

"Sorry m'lord,I'm just bone-tired"

You giggle just loud enough for them to hear...big mistake...

"WHAT WAS THAT?"

Papyrus shrugged

"Looks like it came from over there"

He pointed at your bush,knowing you were in it,you felt so betrayed by this random dude you just met

"Traitorous bitch!"

You yell,already knowing that they know where you are

"PAPYRUS IT THAT,A HUMAN!"

"No actually I think that's a rock"

"OH..."

"But what's that in front of the rock"

"IS THAT A HUMAN"

"Yes,That is a human m'lord"

"Fuck you!"

The little skeleton ran up to you and said

"HELLO HUMAN,I,THE MALEFICENT SANS,SHALL CAPTURE YOU"

"Nuh you shall not"

"YES I SHALL"

He readies a bone attack and prepares to hit you with it when you suddenly pull out a throwing knife and chuck it at him,it hits the sleeve of his shoulder,pinning him up on a nearby tree that was close behind him

"You almost killed him"

"Sorry dude,wasn't trying to"

"You...weren't?"

"Nah"

"..."
Papyrus goes and releases the smaller skeleton and hands you back your throwing knife,just as he does so,you hear a click sound from behind you...

You turn around only to come face to face with the smaller skeleton,he had attached collars and a leash to both you and cooper

"FOLLOW ME PETS,WE ARE GOING HOME"

"Yo what the fuck is going on"

"Well apparently you have been 'captured' by m'lord and you are now our pets"

"..."

"What the actual fuck"

"(y/n) I'm scared"

"Calm down coops,it's all fine,if he tries to hurt you I'll kick his skeleton ass"

"Okay"

The two skeletons take you back to their house in snowdin,on the way the smaller tells you his name is sans and that he and his brother papyrus are working for the royal guard

Once you are in the house they take you both to two small pet beds under the table near the door,they tie your leashes to the table leg and just kinda hang out,asking you questions and stuff,after a while papyrus gets bored so he goes to a place called 'muffets' and leaves you two alone with sans

"SO,UH,WHERE ARE YOU FROM"

"The surface,duh"

"NEVERMIND,WHERE ARE YOUR FAMILY"

"all four of us are orphans from an orphanage at the foot of mount ebbot"

"WHATS AN ORPHAN"

"It means your parents have died or abandoned you"

"OH"

"HOW DID YOU BECOME AN ORPHAN"

"Well my mother had a maternal death and my father abandoned me at the orphanage when I was two months old,cooper here had his parents die in a fire when their house burned down"

"(Y/n)"

"Oh sorry I meant her"

"WAIT SO IS COOPER A BOY OR A GIRL?"

"Cooper is transgender,born as a boy but her brain was a girl so she physically changed herself to match that"

"YOU CAN DO THAT,JUST DECIDE TO BE A GIRL"

"I-It wasn't really a decision I w-was just kinda born like this"

"Coops transitioned at the age of fourteen,she's 16 now,a bit younger than me,I just turned eighteen four months ago"

"HMMMM"

"I SHALL GO GET YOU SOME FOOD HUMANS"

After the little interrogation,sans goes and pulls out some stale tacos from the fridge

"EAT UP PETS"

You both eat the tacos,despite how bad they taste they may be the only meal you get in a while,afer eating sans tells you to go to sleep,you did as told and closed your eyes allowing sleep to consume you...

(2022 words in total)
[this chapter is edited to fix my error on explaining being trans, I hope it fits better now and is no longer misinformation]