ExperimentTale

Undertale (Video Game)
F/F
F/M
M/M
G
ExperimentTale
Summary
The monsters never knew what awaited them on the surface...or what would happen when Frisk, the last human to fall, would enter their lives. One of these monsters was Sans who was the first to be thrown off the rails of his usual resets. But something was different about this last human. The surface seemed welcoming but there was a secret waiting to unreavel.After Frisk dissapeard right after she freed monsterkind and was presumed they would have never expected to meet again after almost 10 years. It was a shock for all. And a bigger shock to see what the King wanted to achieve.
Note
Umm this is awkward i came up with this idea from reading multiple stories and to be honest i never expected myself to write this....AHAHAHAHA help me...well hope you enjoy this weird story i have created lord have mercy on my poor soul.... povs may change at first but i promise after this it will mostly be sans or frisk...i think...DUNNO im not even sure you can call them character pov xD im new to this ok? I do sometimes check back on my chapters to make sure no mistakes escaped.
All Chapters

The final battle and The end

Gaster was trying his hardest to finish his job on time before those two would go and fight eachother. Gaster couldn't let her die...Frisk was like a daughter to him...she helped him more than she could ever imagine and now her life is in danger yet she wants to keep that stupid deal so she could free the others. It's like she doesn't care for herself at all....THAT'S BECAUSE SHE TRULY DOESN'T! It was already 10p.m what does that fucker want from him anyways...tsk..at this rate he will never finish his tasks in time. And two hours later he did finish them...but it was too late. Suddenly a huge explosion could be heard. Now that wasn't a good sign.

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Everyone was at the Quarters except his dad...and Frisk. Sans wasn't alarmed until they all heard the giant explosion or whatever that was, that was coming from close by. That's when Gaster teleported right in the room. 

"Please tell me Frisk is with you.." he said. Sweat was forming on his skull and Sans could feel his soul drop. Oh no. Not her. 

"OH PLEASE DON'T TELL ME THAT IS HER?!" Lucy yelled jumping off the couch making her way towards the door. 

"I think it might be..." and so his dad started telling them all sorts of things he heard at Grillby's but then he said it. 

"That man..he challenged Frisk. We won our freedom by her attending...but if she loses she will be either dead..or a slave for life." Gaster said looking worried. 

"which one is more likely to happen..?" Asked Jonathan. 

"the first.." said Gaster with a serious tone. 

"That's it. Let's go fuckers she won't die on us today!" Said Liam as he got up. The other humans also got up and stretched. 

"LET'S GO SAVE THAT RECKLESS BITCH!!" said Lucy. All the other 6 humans left behind was a gust of wind, as with unbelievable speed they ran to help their friend then they leaped at the top of the canyon. If Frisk was that strong alone....how strong was she with her friends..? Sans took his hands out of his pockets. 

"well..you heard them..Gaster? Got any place for some passangers?" Sans said with his everlasting smirk. Gaster smirked as well. 

"Well would you look at that  i do!" They all teleported. 

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WERE THESE PEOPLE SUICIDAL?! DAMN IT THEY WOULD GET OBLIVIRATED!! Frisk was now sitting in the mud of a crater made where the echo tree was, some water from the river was slowly falling like a small waterfall..but it was so small it bearly made any mud. 

"Oh Frisk...what happened..? Where's the fire!?!" Tha's when all her friends came into view. No...no no no no NO!!

"Oh my Frisky~ seems we have company..let me say HI!!" The psychopath turned away and locked his eyes onto his friends. Frisk got up and summoned a blade. She swang as fast as she could but the man was already gone and she hit the opposite wall of the crater. 

"Nu uh uhhh~! that is very rude Frisk!" The man looked up at her friends. 

"Greetings! But i am afraid because you intervined this is goodbye!" The psychopath raised one hand as some dark tentacle like things wrapped themselves around her friends. They were dripping with hate. Bastard! 

"FUCK YOU! IT'S NOT LIKE FRISK WILL LOSE!!" said Chara and the other humans took her lead. 

"YEAH! FRISK IS THE STRONGEST!" no...no...no...lucy stop...

"YEAH! SHE IS VERY STRONG! THERE IS NO WAY A SMALL WANNABE LIKE YOU CAN BEAT HER!" stop it..liam...no no no...

They all started cheering they all started praising her....ARE THEY INSANE HE WILL KILL THEM ALL NOW!! at the end Sans said. 

"Welp guess the kid is bonefied to win now!" And he shrugged. Doctor Williams looked furious. There was no way she would let him win...not today...not EVER! she won't let him kill her friends. She tensed. She knew what she will do. She will try everything. She summoned a whip. Let's go fucker. 

"YOU ALL SHUT UP RIGHT NOW! AND I WILL STAR WITH THAT OVERLY LOUD SKELETON OVER THERE!!" The tentacles nullified magic. Sans couldn't probably do anything to stop him. That's where Frisk came in. As one of those dark tentacles came straight for Papy she jumped and she used her whip to redirect the blow into the ground. She nailed the landing. Her eyes were glowing red. That's it bastard...she's not here to play.  The crazy doctor smiled. 

"NOW THAT IS MORE LIKE IT 15!! Let's go!" The two both leaped into the air and Frisk summoned a range weapon but when the doctor got close she pulled a stunt by dematerializing half of it ducking below his hit and going straight for his abdomen. She bearly made a scratch. Damn it what the hell?!

"you finally hit me...OH THIS IS GOING TO BE GOOD!!" Frisk was determined to win. Frisk was determined to get to be happy with her friends...and maybe date a skeleton...but for now..FREEDOM! the final fight. SHE NEEDS TO WIN NO MATTER WHAT!! The doctor prepared a low blow she jumped but a tentacle was coming for her she summoned a small blade with two fingers and chopped the tentacle. She looked at her hand in surprise. They can be chopped by magic...Frisk smirked as the red in her eyes intensified. The doctor looked as shocked as she was, then he looked mad. 

"YOU BITCH!! YOU ARE THE FIRST ONE TO BE ABLE TO DO SUCH THING!!" So that was why the tentacles avoided her red magic...OH HO HO! found your weak point fucker! She threw one of her barriers like a frizby cutting the tentacles holding her friends. They still seemed to not be able to summon magic. Damn it...the effect lasts longer than the tentacles..

"HAH! YOU IDIOT!" Said the doctor as his tentacles now started taking weird colored hues...what the hell?!

"I CAN USE THE MAGIC I NULLIFIED!! yes they will get it back...but in this fight... IT'S MINEEE!!!" Oh no...all her friends weapons started flying towards her. She doged but one of the swords hit her arm. The cut was deep she had to admit. But she dealt with worse. 

"HAHAHAAH! STILL NOT LETTING YOURSELF BE DEFEATED...I CAN RESPECT THAT...!" Frisk tried to get a direct attack but the man vanished again. 

"HAHAHAHAH!" She could hear from behind as something sharp pierced her and threw her to the side of the crater. Damn it..

"FRISK NO!!" she could hear the girls screaming. The doctor turned his attention towards them. 

"Tsk..you all are annoying....caring like that...you have freedom...what do you want.."

"we want her Dr. Loco...thought it was obvious from the way they were screaming her name...but i guess they will let anyone work as a scientist these days.." What the fuck was Sans doing?!

"what did you say..?" the doctor said twitching. 

"i said...you. are. dumb! i would say read my lips...but i'm a skeleton..ain't got no lips.." He said with a shrug. No...the scientist was preparing for a blow. 

"WELL THEN LET'S SEE HOW DUMB IS THIS!!" Frisk tensed her leg and with unimaginable speed she managed to push Sans out of the way halfway through the doctors blow. 

"WHAT THE HELL?!  WHERE IS THAT SKELETON!!" Frisk and Sans landed in a bush with Frisk on top of Sans. 

"You idiot! what were you thinking?!" Sans looked at her and norrowed his eye-sockets. 

"distracting him from killing your ass what did it look like..?" Frisk was mad. 

"Not using your life you dumbass!! what would i do if you were to die?!" Frisk blurted that out-loud. Sans was now blue. 

"w-what do you mean...?" he asked. Frisk looked back at the now raging doctor talking with his friends. Thank god they weren't actually trying anything like this dumbass. 

"Listen..i might not come out alive from this but...if i do..i want you to at least know from now..i love you..so don't go do anything stu--" Sans kissed her right there. Hmm..maybe blue and red do go well together. 

"You seriously confessing in the middle of a fight, bucko? Romantic..." Frisk punched him. 

"Oww...you didn't let me finish...i like ya too...now wa'cha got in your mind..? come on i know you have a plan" Frisk smiled as she asked if his powers were coming back. He nodded. 

"You guys teleport away...and i go all in! It will cause distruction to half of the forest if i'm not lucky...if i am the whole blow goes into him...do you trust me..?" Sans looked at her with sad eyes...then he nodded and she used her speed to make it seem like the skeleton teleported back..but now he was next to Gaster. They were whispering something as the doctor turned around towards Frisk. 

"Now lookie who is here...miss 15....now then shall we continue..?" Frisk heard the sound of teleporting then the doctor screaming.

"WHAT THE?! WHERE DID THEY GO?! DAMN THOSE SKELETONS!!" But he focused his attention solely on her. 

She was focusing all her power and happy thoughts into one: her friends, the people she wanted to protect in the canyon, the royals, the kingdom all together...everyone she cared about...she was doing this not with LOVE but with love....and Sans would have been proud....and she was as well of him...he came a long way...such a long way...she hoped she will survive the burst of power...Her eyes shinning with red. Swirling with the power stored in her body. She felt everything get chiller, she could also feel the uneasiness after that coming from this fucker she was fighting. She looked him in the eyes. 

"why are you looking at me like that..." she smirked. He had no idea of her full potential...oh he will get fucked up so bad. 

"STOP LOOKING SO CREEPY!!" Hundreds of tentacles were coming for her. One swing. All down.

"w-what the..?!" The doctor looked anxious and nervous...perfect...she had her schyte ready. 

"w-what is that....w-when..h-how...THERE IS NO WA--" She locked eyes with him again and smirked. 

"see you in hell...bitch..." And she lounged. She swang it in the air and she vanished. Next thing the poor guy knew was he heard. 

"B E H I N D    Y O U"  

The guy didn't get a chance to turn around as hit the guy and unleashed her power. See you in hell...was probably appropriate to say at this point. 

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As all of them were at Grillby's, waiting anxiously, Lucy screamed as she was looking out the window at the place where they've just been. Sans rushed towards the window only to see all the trees around the area fallen...and dust raising towards the air. Oh jesus christ kiddo...

They all rushed there as fast as they could. The area they were supposed to search was huge. It was easy to find the fuckers body but..no sign of Frisk. They started calling her to see if she was alive. Jonathan found her necklace...Lucy her pick..but where was she...? Some gave up...one by one..going to their homes in defeat...but Sans didn't give up..that's when he realized... What if...Sans rushed to the only spot they didn't search..where the tree used to be. 

"FRISK! kiddo come on we've all been searching for hours...please..." Sans couldn't see well in the dark...his flashlight died a hour ago. 

"come on kiddo...y-you can't leave me again...we can...read together...look at stars...play again...you know as a skeleton..i-im good at the trombone...j-just don't leave me....come on bucko" Sans sat down in the mud...He didn't care at that point. That's when he saw a small blue light. He got closer to see a small sappling growing from the ground. It was twinkling. 

"beautiful isn't it..? I do believe it's called an echo tree." Said a voice behind him. Sans percked up. 

"don't you know how to greet an old pal..? Turn around and shake my hand lazybones.." Sans turned around at what felt like the speed of light as he hugged the person behind him and let go of the tears he held in. For the first time he didn't care he was smiling while crying...he was happy. 

"Shh..i'm here bonehead...did you really search for me for hours and didn't think i was here...?" Sans hugged Frisk tighter. 

"NEVER SCARE ME LIKE THAT AGAIN! I THOUGHT I LOST YOU, FRISK!" Frisk smiled. 

"nice to see you too...lovelybones.." And frisk wrapped her hands around her skeleton. 

"Jeez bucko..what did i say about scaring me like that..?"

"your heart can't take it and you will have a heart attack?" Sans laughed then pretended to gasp. 

"oh no.. oh nooooo it's happening i can't breathhh...gravity is increasing on meeee...oh noooo..." as he fell down in the mud pulling his human with him. 

"YOU PIG! I ALMOST FELL FACE FLAT IN THIS ONCE! YOU DON'T NEED TO MAKE ME FALL TWICE!" And they both laughed. 

"so about what i said...does that mean we are..."

"dunno..do you want to..?"

"yes...do you.."

"yeah..i'd like that..."

"oh LOOK A SHOOTING STAR! dude make a wish!" Sans eye lights looked his human up and down. 

"nah bucko..it already came true..."

"woowww mr. flirt where did you keep these when i was younger?"

"I would have gotten charges you twirp!" He said as he flicked her in the head. 

"excuses excuses you got G's! those are hella expensive here!" He laughed. he could get used to having her in his arms like this. 

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Oh how he didn't want to get up from bed but Frisk was literally screaming at him and she would probably pull out her big ass schythe. 

"IT'S YOUR BROTHERS WEDDING GET UP YOU LAZYBONES!" Oh right...that's why she was screaming. Damn it paps...you seriously are getting married to the tin-can. 

"i don't wanna wear the monkey suit!" He said as he pulled his blanket over his head. Frisk opened his wardorbe. Wait who even let her in?! Oh right...his dad...he seriously needs to get them an apartment...probably in the Quarters with all his friends. Undyne and Alphys are too searching for one down there. 

"If i am wearing a revealing ass dress picked by Lucy, you are wearing your tux" She's wearing what now..? 

"I'm up! I wanna see the dress!" Pillow smacked him in the face. 

"PERVERT! now shoo get ready. I still haven't put it on. Sarah and Chara have put a ton of make-up on my face. I look like a fucking clown... AYE CARAMBA" Sans used blue magic to pick him human up. 

"Shhh....it's too early and you look beautiful..did Toriel take care of your hair..? Smells nice.." Frisk pouted and crossed her arms..then she kissed the top of sans skull leaving a mark. 

"There you are now stampted." He laughed. 

"didn't i stamp you last nig--" She looked at him with narrowed eyes. 

"you finish that sentance and i'm not going to grillby's with you anymore." He shut up. 

Yeah..life was good...he could totally get used to living like this...

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WHAT WAS SANS THINKING?! He acted out of impuls asking Frisk to meet him at the echo tree...and he was pretty sure he was the nervous one, especially seeing her in that baby blue dress. He was in deep...

"sans? lovelybones what's wrong you look like the world is ending" she joked. Sans smiled at that. She was so sweet. 

"Well Frisk...do you know why we are here...?"

"no..not really...care to shine a light?" This is it...hooo boy...

"Frisk...i really  love you..i can't imagine myself with anyone else so...umm" He knelt and pulled out a small box. Inside was a ring with a lotus flower on it. Frisk gasped and covered her mouth. Tears forming at the corners of her eyes. 

"Frisk..will you marry me..?" He said his voice cracking at the end. 

"YES YES YES A MILLION TIMES YES!! OH DIOS MIO! OF COURSE LOVELYBONES!" She threw herself in his arms and he almost lost the ring. This truly was a happy day.

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After such a long life with a wonderful family with 2 kids...and after his wife died of old age...it was his time to dust....and so he woke up on a field with flowers. Red and blue and an echo tree in the middle. 

"hey lovelybones...come sit!" He smiled at Frisk who's short hair was swaying in the wind. he sat down and they both stayed there...watching the world go by...but it was the two of them...forever. 

Yeah...he was happy....and the way it was just the two of them...made it feel right. Maybe death wasn't as bad as he thought when he got killed by that maniac child. 

Because love made everything right. 


"DAD CAN'T JUST DIEEEE! MAKE MOMMY AND DADDY IMMORTAL!" Sans laughed at his daughter. 

"Oh come on kiddo you are ruinning the story here!"

"It was cool ...it is mommy's story after all...BUT YOU CAN'T DIE! I'M ONLY 10 AND ARNO IS 8!!"

"ok kiddos that's it it's time for be ok..?"

"AWWWWW" 

"Now now no whinning your mom is busy tomorrow with Mettaton's 'party' or whatever."

"ok ok...night daddy"

"night buckos...love ya"

Yeah...life wasn't bad at all.


 

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