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

Changing history

"hmm..? Where's Gaster, Sans?" Frisk asked, rubbing her eyes. 

"he's preparing something and he's going to hotland." Frisk nodded. 

"What day even is today that it's so important for him to go?" Frisk said drinking some juice. 

"i believe....6 november..?" Frisk spurted her drink and started coughing. Her eyes widened. 

"WHAT?! TODAY?!" Sans looked confused. 

"yes...?" Frisk looked around franatically. She pulled out her phone. It was 9 in the morning. She had time. She can do this. 

"Do you know where he is going Sans?!" Sans thought about it for a second and his face darkened. 

"no." He said, even if it was clearly a lie. So he was aware he was going to The Core. If he will jump in the man was screwed. Frisk quickly pulled on her jacket and opened the door. She started running. 

"frisk?! FRISK!! WAIT!!" He groaned and teleported after her. She was fast. He always knew she was fast. The wind was howling as he tried to keep up with her. How was she so fast...? Ugh...no time for that. He needed to catch her and ask her what was wrong. Oh his way however he saw that their friends did exactly that as they stopped her in Waterfalls. 

"Frisk..? Why are you running..?" Undyne asked. Frisk looked at all her friends franatically. 

"I-I seriously don't have time for this. Listen, we can talk when i get back ok? This is important." Undyne frowned. 

"OK LISTEN! YOU'VE BEEN KEEPIG SHIT FROM US! We get that the RESETS are awful and Sans has the same power but what bad can happen now?!" 

"If you won't move...IT WILL HAPPEN UNTIL I FINSIH TALKING!" Frisk said. Sans came and grabbed her hands. 

"frisk, what is wrong?!" Frisk looked around. 

"Damn it..I'M LOSING TIME!! I'M SORRY IT'S FOR THE BETTER!!" She pushed Sans and ran past Undyne. Undyne's eyes widned as she summoned a spear and she didn't even look when dodging it. She never did this. She never ran so fast. She just pushed him. She was running fast. 

"w-w-where is s-she g-going??" Sans frowned. 

"the core." Alphys looked confused. 

"D-does s-she have b-business w-with Gaster?" Sans shrugged again. He started teleporting. They all tried to stop her through different means. She ran right through a wall of fire like a maniac. She jumped over electric puddles, she was unstoppable and soon enough they were chasing her through Hotland. 

"FRISK PLEASE! WE JUST WANT ANSWEARS!!" She pressed the button for the elevator. It was broken. 

"NO!" She yelled and hit the elevator. Her eyes widened. She will just have to run more. She darted and passed right through the lab, she jumped and speed through the whole damn Hotland. She didn't care that she was acrelessly jumping over magma. Sans was growing tired. Frisk was just running. Suddenly they were all at the door of The Core. She was jumping on the spot murmuring.

"frisk?!...oh god jesus...she's fast." Sans said. 

"left, left, right, left...uhh...shit-" Frisk said jumping, trying not to lose adrenaline. 

"Frisk!...we've been running and teleporting after you for almost an hour. What is it?" Frisk finally stopped and sighed. 

"remember how i told you there was no Gaster from where i was from...? I'm preventing that." They all froze. 

"s-so you've ran this whole way...t-to prevent" Frisk realized she has been wasting time. 

"WHAT TIME IS IT?!" Frisk looked desperate. Toriel took out her phone. 

"Almost 11 I--WAIT FRISK!!" 

"left, left, right, left, right! GO!" She darted towards the center of The Core and just as she said, those were the corridors taking her where she wanted. She ran into a room filled with Gaster's stuff and experiments. Sans teleported right after her as the others were running, a bit left behind. There was a huge hole, showing the power source from the Underground, Gaster was leaning on the railing. Frisk's eyes widened. 

"NO!" She jumped and pushed him back as she sat on the railing. She lost ballance and almost fell backwards. 

"FRISK!" Sans yelled and teleported to catch her by the hand and he did. 

"DAMN IT, DON'T LET GO NOW! GET UP!" Undyne and the others finally arrived as well. 

"FRISK! BONE BUDDY HOLD HER, I'M COMING TO HELP!" Frisk was starting to slip. Her feet were dangling. Undyne was holding her other hand. 

"Oh my god!!" Toriel exclaimed as she got next to Frisk and they all tried to pull her up, however she slipped, she was falling. 

"FRISK! NO!!" Sans said, pushing a bit into the railing. To their surprise the railing fell. So that's how the scientist would have died. Sans stumbled backwards. Gaster immediately rose his hand and caught Frisk, who was still falling, and almost erased herself. Everyone's eyes widened as they looked behind at the now sitting up scientist. 

"What the hell is happening here?!" The scientist asked. Frisk rolled on the ground and started coughing. She did fall in the darkness a bit. She coughed bits and pieces of the void. Dark sludge. Sans backed away in horror. Frisk wiped her mouth groaned. 

"Always hated that damned place...bleagh!" Frisk said letting herself flop on the floor. Sans knelt down next to her and hugged her. Undyne was next, then Toriel, Asgore and Alphys. They all broke the hug, apart from Sans who tightened his grip. 

"i swear to god...you always find a way to make my blood pressure rise and to give me a heart attack." Frisk laughed and hugged back her best friend. Frisk looked at the now mad scientist. Oh oh...

"Frisk. Explain. Now." So Frisk told him her story. The Amalgam of monsters, secret LAB, Gaster being erased. The scientist looked at Frisk, as she almost cried speaking of him being erased and the awful impact it had over her friends. The man frowned. 

"I am...sorry...i shall reinforce the railing and...i won't lean on it again....My god...Erased from existance? But that does prove my theoreme about the Void. Thank you, Frisk!" She smiled. All the kids were tired from chasing Frisk so they left to go home, as the last two kids, the ones under Gaster's roof, Sans and Frisk, reamined some more. 

"was i...really that...sad..?" Frisk nodded. 

"yeah...you never trusted me one bit." Sans frowned. 

"i..i trust you...you know that, right..?" Frisk looked at her best friend and smiled. 

"Of course i do. We're best friends! Here!" She lifted her pinky. He did the same as they intertwined them. 

"I promise to always trust you and that you will always be my best friend!" Sans blushed a bit and so did Frisk. 

"heh...i promise the same..." She smiled and then looked up ahead at the foggy sulfuric clouds they were watching. 

"You know, you were really brave to actually help me back then when you knew that you could have fell as well." Sans shrugged. 

"i..i didn't really care..all i knew was i couldn't let you get erased from existance...i couldn't lose my best friend..." Frisk blushed then started giggling. Sans was confused. 

"w-what's so funny??" 

"You care for me!" She said with a smile. Sans sockets widened. He flicked Frisk in the head. 

"the heck is with that?! of course i care!! you dummy..." Frisk smiled and kissed his cheek-bone. He froze as she got up and started walking. 

"Now come on! I wanna go home. Wanna watch a movie or something..? I already finished the homework we had at math." Sans stood there for a few seconds before he finally got up and started walking after her with his hands behind his head. 

"sure. what do you wanna watch..?"

"Disney!"

"you're such a kid..pfft-" 

"Sans.."

"hmm..?"

"We may have adult problems...but we're both kids." 

"oh. right." 

"Pfft-"

"d-don't laugh! i just forgot!"

"YOUR AGE?!"

"SHUDDUPPPPP!!" They both stayed in silence for a minute before they started laughing. And yes, they did watch Disney movies for the rest of the day. 

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