Quantumtale After Life

Undertale (Video Game)
F/F
F/M
M/M
G
Quantumtale After Life
Summary
After a wrong RESET Frisk and Flowey got sent back in time when all her friends were around her age. The souls have been scattered around the Underground and they keep messing with time. After this RESET Sans is now able to control time. Frisk has managed to restore her world from before the RESET after she gathered the SOULS, a new Frisk and Flowey being born. But she and him never left this world. She freed the monsters in this world. She's living alongside her 'new' friends down in the Underground, officially becoming TimeKid!Frisk and we are taking a look into the lives of our Quantumtale friends. (Yes, humans sometimes come to the Underground and monsters go to the Surface).
Note
Sooo~ We'll starte nicely, we're going to take that beautiful one-shot 'Royal Rivalry' by perfectshadow06 (also the creator of this beautiful AU) and i will make it Frisk and Sans.
All Chapters Forward

Babysitting, ice creams and dates

"They're helpless." Said Frisk as she, Sans and Papyrus were watching Gaster text his 'girlfriend' on his phone. Sans face-palmed. 

"the hell is he doing...? POP THE QUESTIONNNN." Frisk scoffed. 

"You're one to talk...It took you longer AND help from Asgore." Papyrus lit up. 

"THAT'S IT! HE JUST NEEDS SOME HELP!" Frisk and Sans looked at papyrus, intrigued. 

"Go ahead." Frisk said, leaning against the doorframe, cockily. Papyrus smiled. 

"WELL I SAY WE ASK HER ON A DATE FOR HIM." Frisk hummed as Sans tapped his chin. 

"that does sound like a good idea.." Frisk smirked. 

"Guess we'll do this. You two handle the distraction. I text." Sans frowned. 

"Why you?" Frisk snorted. 

"1.I'm a human AND a girl. 2. You two are awful at texting. Especially grammar." Sans and Papyrus frowned. Frisk sighed and pulled out her phone. 

"'Hey hooman, do u want anything from the store?' all in caps." Frisk said, eyeing Papyrus, who looked away in guilt. Then she switched to Sans. 

"'hey. u home yet?' 'd8 night' 'ily2'...Come on Sans you can do better than this." Sans shrugged. 

"too lazy. OW!" Frisk smacked him, behind his skull. He rubbed the spot. Gaster eyed the kids suspiciously. They all smiled and started slowly sliding behind the wall to their left, next to the kitchen door. He shrugged and went back to texting. They all sighed. 

"fine. you text. let's go." Frisk nodded. The two skeletons went over to their father and started talking to him. Frisk pretended to walk in to get a cup of water. Gaster rolled his eye-lights and got up to follow the two. Frisk eyed the phone and as soon as he was out of view she lounged for it. She knew his password since it wasn't hard nor did he try to hide it. She opened the texts with Kat and smirked as she asked her if she was free so they can go out. She said she was and she would love. 

"But there's a problem?" Frisk mumbled to herself confused. She blinked in surprise as she saw the next text. 

"SHE HAS KIDS?!" Frisk yelled too loud as the three skeletons were coming down. 

"WHAT?!" The two kids said and Gaster face-palmed. 


"Well...I should be thanking you, you little shits. But i won't. And you will be taking care of her twins." Gaster said as he crossed his arms. The three were all looking down in guilt. 

"At least you'll get laid? What size do you have?? Need me to buy them for you?" Sans and Frisk both started snickering at what she said. Gaster groaned. 

"WHY WOULD HE WANT TO GET 'LAID'...LAYING DOWN ISN'T THAT FUN..." Frisk and Sans sighed in relief at the end of the sentence. For a second they thought they would truly lose their heads. Frisk put a hand on her chest and sighed in relief. 

"oh my goddddd...i saw my life flash before my eyes...UGHHHH!" Sans said, letting himself fall on Frisk's shoulder and burry his head there. 

"Papyrus...never scare us like that again..." Frisk said. Gaster was giving them a stern look. 

"You got lucky...Now, she will be here in an hour with her kids so we can go on our date." Frisk clasped her hands together. 

"Alright! It won't be so bad! I'm sure--" Frisk tried to say, but Gaster cut her off. 

"They're literal demons from hell. I want the house mostly intact by the time i get back." Frisk blinked and let her hands fall as she slumped down in disappointment. 

"Of course they are..." She said looking with a deadpanned expression through Gaster. And the next hour was spent helping Gaster dress nicely. Since, and i quote the children's words, 'Gaster has no taste what so ever in clothes'. And it's true. He takes Frisk shopping with him for a reason. 

"Ok ok ok...STOP HOGGING ME SO MUCH SHE'LL BE HERE ANY MINUTE!" Frisk growled. 

"PUT SOME COLOGNE ON YOU BIG BABY! SHUSH!" Frisk jumped on him and sprayed him a bit then sniffed. Sans snorted. Papyrus shook his head and face-palmed. 

"There...Jesus, you're worse than a toddler." Frisk said crossing her arms when a knock comes at the door. 

"Ah! Kat! I'm so happy you're here." Said Gaster as the kids all were wiggling their brows behind him and then they started snickering. Kat smiled. 

"I'm happy too! Thank you so much! Now...These are my kids. Uhh...will you three be alright taking care of them?" That's when they spotted the two twins holding hands. She blinked in disbelief as she looked in their eyes. She felt her soul drop. 

"Get the fucking chains..." Frisk gritted through her teeth to Sans. Sans raised an eye-brow in confusion. The two twins stepped inside. Frisk was smiling tensely. 

"These are Annie and Oliver. Please be nice kids." Kat said as Gaster and her joined hands and left. Frisk finally crossed her arms. 

"Demons." Frisk spat out. The two kids smirked. 

"Frisky~ We missed you~" Frisk rolled her eyes. 

"I should have known Kat was familiar... Tsk...Sometimes i wish we didn't have to do voluntary work for the orphanage...Used to be their baby sitter. These are known as the devil's twins. NEVER get them out of your sight. Or else--" Frisk raised her hand just as something sharp was coming for her from behind. 

"You won't get out intact. Which one threw the fucking ruler?!" Frisk said, turning around. The two kids pouted. 

"With her as our baby-sitter we're never getting rid of that guy." Frisk's eyes widened. 

"excuse me getting rid of WHO?!" Sans asked as his eye started flaring. Papyrus was frowning and crossing his arms. The three of them were a power team when needed. If these kids did one wrong step they were done for the whole night. 

"Oh come on...We won't let mom date a skeleton monster." Frisk's mouth fell open. The AUDACITY. Frisk chuckled. 

"Hell you won't you selfish brats...Your mom is one of the nicest persons we know and we care for her happiness equally to Gaster's so if you THINK we're going to let you do anything YOU'RE wrong." Frisk said frowning. Papyrus pouted. 

"I WAS TRULY HOPING WE WOULD MEET OUR STEP SISTER AND BROTHER THROUGH A MORE CIVIL WAY...BUT I SEE THEY ALREADY DISMISSED ANY DEMOCRATIC APPROACH WHEN FRISK WAS AT THE ORPHANAGE." Sans nodded. 

"it's fine, paps. they MIGHT warm up to us when they see they don't stand a chance." And the night begins. The twins were playing together on the carpet as Frisk was reading on the couch, Sans was ordering some pizza and Papyrus was doing his homework at the table. The two devil twins smirked and took out some of their toys. Frisk looked up from her book of a second as the kids were giggling. Frisk sighed. 

"Incoming three o'clock, Papyrus." She said as the kids started throwing toys. Papyrus effortlessly dodged his head. One toy however changed trajectory and Frisk smacked it with her book. She blinked in surprise as the edges stuck to the book. The toys were sharpened. 

"You little WOAH!!" Frisk's foot was tangled in a hopping chord and the kids were pulling her around the carpet. 

"Uhhh....Sans? Help?" Frisk said as the kids were now trying to tie her up completely. Sans looked at the kids and frowned, snapping his fingers and freezing them in his blue magic. They wiggled their legs who now weren't touching the ground anymore as he came and knelt down, untying Frisk. 

"this isn't how i imagine you tied up but close enough." Frisk smacked him, but then she patted his skull and kissed his cheek. 

"Thank you, lovely-bones. get the devils down now." The kids gagged. 

"Isn't she your sister...??" Annie asked. Sans shook his head. 

"gaster may be her legal guardian but that doesn't make her my sister." Frisk shrugged. 

"But he is kind of like a father figure for me." Sans shrugged. 

"eh, collateral damage then." Frisk smacked him again. The kids were lowered and were pouting since their plan was stopped. The pizza came and the three kids alongside the demons were eating pizza. That's when Frisk realized something. 

"Oh no..." She got up, emptying her plate on Sans plate and used her plated to stop the greasy food the devils were now throwing around from touching something. 

"UGHHH! WHY ARE THEY LIKE THIS! WOWIE!" Papyrus said as he grabbed one slice as it was about to hit the couch. Sans growled. 

"they're starting to really piss me off!" Sans used his magic and stopped another slice. The kids plates were empty now and the three older ones were glaring at them. 

"Oh Oh." They both said as Frisk grabbed them and put them inside a fence she installed. It was the ONE thing those two never got past. Baby fences. 

"UGHH! LET US OUT!! THIS IS BULLSHIT!" Oliver said. Frisk spurted her drink. 

"Where in the name of Prince Fluffybuns did you learn that language?!" Frisk said in disbelief. Sans groaned. 

"GREAT! now they'll blame US for it!" Papyrus frowned. 

"I HOPE I NEVER WAS SUCH A BIG BOTHER TO YOU TWO..." Frisk smiled and kissed Papyrus forehead which earned a small jealous glare. 

"Don't worry, Papy. You weren't. They're just like this because their father left. They want him back even though their mom moved on and that man was an abusive prick. I remember reading his file before taking on babysitting...Again, voluntary work at the orphanage was mandatory. " The two kids who were sitting inside the baby fenced corner frowned and looked away. Sans sighed. 

"kids are so troubled sometimes..." Sans said letting his head fall backwards on the couch. Frisk snorted. 

"Tell me about it...It's quite sad really..." Papyrus shook his head. 

"IT IS...BUT I'M SLEEPY...." Frisk smiled. 

"You can sleep on me if you want." She said and let Papyrus lean on her side. Sans was leaning on her other and the two teens were cycling through Tv programs as the two twins were talking and listening to them. 

"you think dad's doing ok...??" Frisk smiled. 

"If you got his genes? They're probably running out of the place before getting kicked out." Sans scoffed. 

"ONE. TIME. jeez... you think kat will accept us...?" Frisk shrugged. 

"Dunno...but if there's one thing i know is Gaster will leave her if she doesn't. She cares a lot about you two." Sans frowned. 

"i meant all of us, frisk..." Frisk hummed. 

"My answer still stands." The two devils groaned. The older kids ignored them. 

"Man you two are so insecure...? What the hell happened to you two? Did your mommy leave you or something???" Sans tensed up as Frisk stiffened. 

"my mom died...." Sans said looking away. 

"And you? Oh wait...They left you in that orphanage~" Annie chided. Frisk raised an eye-brow. 

"You said that they aren't dead?" Frisk said as she looked at them with dull eyes. The kids were uncomfortable. 

"O..Oh...That isn't...umm..." Frisk smirked. 

"Funny? Yeah...I know..." Frisk said as she changed the channel again. Sans growled. 

"fucking brats..." He said under his breath. 

"WE'RE NOT BRATS!" Frisk looked at them and raised an eye-brow. 

"Oh really? To me it looks like you have a loving mother who does everything for you...money...toys...And you STILL are not satisfied." The kids gritted their teeth. 

"We just want a dad!!" Frisk frowned. 

"And what's wrong with Gaster then?! He was more than happy to have you in his home! HELL HE WAS SCARED YOU TWO SHITS WOULDN'T LIKE HIM ENOUGH TO ACCEPT HIM! But nooo...You want someone that HATES you and is your family by blood. NEW FLASH! FAMILY BY BLOOD DON'T ALWAYS LOVE YOU!" Sans put a hand in front of Frisk. Papyrus was now sleeping on the couch as Frisk got up. The kids looked at her in shock. Nobody EVER stands up to what they say. 

"Family by blood....Can hate you with all the blood you share..." Frisk said as she sat back down. Sans growled again and he teleported with Papyrus. As he came down Frisk was tapping her fingers on her arm. She was mad. 

"Umm...listen we're sorry...can we...go for some ice cream and talk? No tricks." Frisk looked at the kids and then at Sans. He frowned and snarled. Frisk sighed. 

"One last chance." 


They were walking on the Surface after they teleported and woke Papyrus up as well to take the kids to the store. They were actually behaving and Frisk found it quite pleasant. So did Sans and the two devils. 

"You're not so bad..." Annie said. Frisk smiled. 

"You two as well when you actually try. See? It ain't so bad to cooperate." They all started talking and apologizing about the mean things they said. Sans was listening to what flavors the kids and Papyrus wanted when some bigger kids came in. They looked around the teens age. They shoved past the four and Frisk raised an eye-brow. 

"Excuse YOU but we were in line." Frisk said. The group laughed. 

"And what can YOU do, huh rat?" Frisk scoffed. 

"Excuse me, you talking to ME? Oh honey...No...Who lied to you that you're privileged like that?" Frisk said, giving attitude back to the guy who spoke. 

"Listen. I get it...You're with your freak friends and your two unwanted siblings and want to get back home faster for bed time. It's ok, we'll be quick. Oh and also...STAY IN YOUR PLACE! Thank you." He said as he punched her. The woman behind the register gasped as she covered her mouth. The two twins covered their mouth at the response. Frisk nodded as she turned around with a hand on her cheek and lip. 

"Repeat the part about siblings?" Frisk said as Annie and Oliver deflated. 

"Unwanted siblings..??" The guy said amused. Frisk brought her back straight and cracked her knuckles. The guys were uneasy at that. 

"Oh that's ALL i needed....I do believe there's a three strike rule...right Sans?" He smirked. 

"right again, frisk." She smiled as she turned around again. 

"Strike 1. Unwanted siblings? Sorry honey but they get more attention then your businessman daddy can give you. Money isn't everything...plus if you look at that bill in the light, it's fake." She said with a wink. The two twins beamed as Frisk took their side. 

"Strike 2. Freak friends? Ohhh I'm sorry I thought I didn't take the Tardis to go back to freaking 19th century...Man, do I need to also put a leash on them? And I do believe that one is BOYFRIEND not friend but I'm scared you'll puke on the floor." Frisk then raised up three fingers and smirked. 

"Strike 3. NEVER underestimate your opponent in a fight, got it babes? Your punch is WEAK! What do you train with? Scare-crows? Or you will get hurt from splinters~ Tsk..." Papyrus smiled. 

"ANDDDD OUT!" Papyrus said, pretending to be a fight narrator as he brought his hand down. Frisk winded back her arm and smirked. Sans hissed as he saw her. 

"they're fucked..." He said as he turned around and went further in the store. The twins tilted their heads as they watched Frisk. 

"You heard the man. Strike 3. OUT, HOE!" She punched the guy in the face so hard he twirled and fell on his friends. Sans summoned a blaster and his eye started flaring. Papyrus summoned a set of blue and orange bones. The guys were trembling. Frisk stomped her foot at the others who fled with their friend. Frisk laughed. 

"AND THAT'S ON FAMILY LOVE! PERIOD!" Frisk said as she posed. The woman at the cash register cheered. 

"For taking them out I'm giving you all free ice creams. YOU ROCK, GURL!" Said the black woman at the register. Frisk smirked. 

"It's all in my blood. Mexicans got that spicy mouth." The woman snorted. 

"I like you. Come back again!" Frisk winked and she looked at the three smaller kids of the group. 

"Come on. Ice cream's free. Don't tell me you won't take it." She said. The three jumped up and started giving their orders. Frisk looked at Sans who went over to the slushy machine and got them both slushies. They fist-bumped then high-fived down low. 

"man you're a badass." Frisk stuck her tongue out and shrugged. 

"What can i say? I'm tired. I am hot headed when i want to." Sans snorted. 

"and that's on toxic parents." Frisk did a gesture with her hand. 

"Periodddd!" Sans laughed and gave her a peck on the forehead. 

"dork." They all left the place and started walking. That's when Frisk's phone started ringing. 

"We're fucked..." Frisk said as she looked at the phone and found out that Gaster was the one calling. 


"WING! HER FACE!" Kat said as they arrived home. Frisk put a hand on her lip and cheek. It was probably swollen and bruised. Gaster pinched the bridge above his nasal cavity. 

"MOMMY! YOU WON'T BELIEVE WHAT FRISK DID! WE WERE OUT TO GET ICE CREAM AND THESE GUYS CAME TO SAY MEAN STUFF!!" Annie said jumping up. Oliver jumped up as well. 

"AND THEN HE PUNCHED HER. AND AND AND SHE CRACKED HER KNUCKLES!! AND SHE TURNED AROUND ALL COOL AND STUFF!!" Oliver continued. 

"AND SHE THEN WENT ON ABOUT TALKING ABOUT 3 STRIKES AND AND WHEN SHE GOT TO THREE SHE DID THAT THING!!" Annie said excited. Oliver tried to wind back his arm. Frisk snorted and smiled as she leaned against the wall. Sans was holding it in with his fist. Papyrus covered his mouth at the cuteness. 

"AND THEN SHE KNOCKED THE GUY OUT WITH A SINGLE PUNCH AND HE FELL LIKE A TWIG!! THEN THESE DRAGONS HEADS AND COLORED BONES CAME AND THEY ALMOST PEED THEMSELVES AND RAN!" Frisk, Sans and Papyrus stiffened. Oops...Kat blinked at her in surprise. The three looked away. 

"THEN THE LADY AT THE CASH REGISTER GAVE US FREE ICE CREAM BECAUSE SHE WAS PROUD OF FRISK!!" The two kids were jumping around. Kat looked at Frisk and she rubbed her neck awkwardly. 

"I won't let anyone talk like that to them...Nor Sans...Nor Papyrus...Heck...Any of my friends!" Gaster sighed. 

"How was the posture of the guy?" He asked, pretending to be mad. Frisk knew that look. 

"From mediocre to horrible. His punch was amateur. Barely left a punch thanks to hard bones." Gaster nodded and pretended to look disappointed. Kat looked at Gaster with a pleading look before her picked her up in a noogie. 

"THAT'S MY GIRLLL! Did you break his jaw?!" Gaster asked excited. Sans raised his hand. 

"100% she did! oh and paps is SO getting better at his bones!" Frisk gasped. 

"OH BUT LET;S NOT FORGET THE BLASTERS! Yo you surely trained more! Have you seen the size?! It's bigger!" Papyrus frowned. 

"BUT LET'S NOT FORGET ABOUT THE COOL WAY WE SCARED THEM AWAY!!" The three bigger kids were going on and on about techniques and Frisk was showing the two how she winded back her arm and explaining why. Kat then started laughing. 

"What a power group indeed...You surely were right about these three." Gaster smiled lovingly at Kat. The kids looked unimpressed. 

"Just kiss already." They all said. The two flushed but Gaster approached with a quiet 'May i?' and they kissed. The kids were sent howling. 

"AYEEEE!! FINALLY!" The teens said as they pulled out their phones and started taking pictures. Papyrus started laughing and pulled out his own phone and climbed on their shoulders to get a better view. The twins looked at each other. 

"These three are crazier than us..." Oliver said. Annie nodded. 

"Agreed." They licked their ice creams and watched the scene unfold. 

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