Upside-down

Undertale (Video Game)
F/F
F/M
M/M
G
Upside-down
Summary
Frisk is a monster that lives on the surface, however she always heard about the humans trapped underground after they stole their ability to use magic in the Great War...however Frisk is curious. As she was climbing up Mt. Ebbot trying to pick some stuff as usual, she finds herself falling deeper and deeper in the deapths of a new beautiful world.Will Frisk leave the humans down there or will she sacrafice her monster soul to help them?
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Chapter 33

The ball. Well, Sans was awkwardly trying to get away from a whole group of girls trying to hog him but then he noticed Frisk. She was alone for some reason. So he teleported next to her. 

"sooo...a pretty girl like you alone? that must be a glitch in the system of our world." Frisk's eyes widened and she looked at Sans. 

"Sans! Oh, sorry. Nah, just Ralph getting a surprise visit from his boyfriend." Frisk said, chuckling. She then pointed at Ralph dancing with a lion monster. Sans snorted. 

"they do look good together." Frisk laughed. 

"I know right? I've been telling him for a month to ask him out before he did!" The two chuckled as they watched the monster couple dance slowly. They looked at each other and Frisk and Sans both started. 

"Umm." They froze. They laughed again. 

"You go first." Frisk said. He smirked. 

"well...i'm hoping you were also thinking about asking me to dance cause i sure as hell am asking you." She snorted in her hand and smiled brightly. 

"Let's dance then." He blushed and smiled, out-stretching his hand towards her. They both walked on the dance floor and Frisk put her hands on his shoulder and he grabbed her waist. They swayed together and waltzed. 

"soooo~ since you don't have a date. wanna be mine~?" Sans asked with a raised brow. Frisk blushed. 

"R-Really?" He frowned a bit. 

"sorry if you don't want to--" She spurted. 

"What?! No! of course I want to! I just didn't expect you to actually want to ask me as your partner-- OH MY GOD AND I ACCEPTED RALPHS INVITATION RIGHT IN FRONT OF YOU!" Sans could see how she blushed in embarrassment and her tail stopped wagging, her body tensing up. He laughed. She was truly adorable. 

"'s fine sweetheart, really." He assured her. She sighed in relief and the two continued dancing. They had a lot of fun. They danced, punned, even played a prank on one of the university teachers and then they decided to go outside for a breather. 

"Aw mannn! Did you see his face?! He will surely give us another project for that!" Sans started laughing. 

"pretty much." They walked a bit around the empty campus and then Sans stopped. He needed to do this. 

"frisk...i...i want to ask you something, ok??" Frisk turned to him with her golden eyes solely on him. 

"Ok." He sighed. 

"and promise me whatever i'm about to say won't ruin our friendship, ok??" Frisk nodded. 

"Ok...What's wrong...?" She asked, worriedly. Sans inhaled and exhaled. 

"frisk uh- i'm not good with feelings and that shit....i really REALLY suck at that. you know about the resets and stuff they- they can mess someone up but....i feel different around you? like a good kind of different and--" Frisk snorted. Sans froze. Shit shit shit- was she laughing at him?! Oh god-- 

"Is that your way of saying you like me? You dummy! And I was here worrying how to tell you I like you!" Sans blinked in surprise. 

"....what?" He asked, confused. Frisk started laughing in relief. 

"Oh my GOD! Thank GOD! Yes, Sans...I like you too and I will be your girlfriend." Sans blushed. 

"you're...serious...?" He asked, dumbfound. He actually didn't expect her to like him back. 

"Yes, you dummy!" Sans ran a hand through his hair. 

"holy shit....HOLY SHIT--" Then he pulled Frisk in a kiss and her eyes widened, changing colors wildly. She was a blushing stammering mess after that. 

"i haven't felt this happy in ages- god damn it, sweetheart, i've waited for this a long time." Frisk smiled and the two rested their forehead against the eachother's. 

"I did too..." She said softly. The two closed their eyes, holding the other one close and smiling. That is until it started raining. The two looked at each other and started laughing. Yeah...that works too. 


And they told Papyrus who was more than happy to receive the news and they told Chara, Asriel and all of their friends. A lot of them expected it apparently. Alphys even shipped it. And for two weeks everything went great. But now here were Sand and Frisk, walking around campus with Papyrus, Chara and Asriel when a couple of men dressed in black entered. They all were confused as to why they were being approached until:

"Frisk Sanchez? You have to come with us." Frisk raised a brow. 

"Do I know you??" One of the men stepped forward and Frisk paled, backing away with shaky steps. 

"I could recognize that men out of millions....I THOUGHT YOU WERE ARRESTED! AFTER YOU YOU- YOU RAPED ME!" Sans looked at the man and immediately the memories from back in the Underground flooded back. That's the asshole that raped Frisk! He was about to step forward and give a piece of his mind to him when he grabbed Frisk and twisted her arm behind her. Sans froze. 

"I believe you realized it was IMPOSSIBLE for a gryphon to just appear out of nowhere again, didn't you? Well...that was OUR fault." One of the men dressed in black said. Sans snarled as Chara and Asriel widened their stance at a ready. Papyrus watched in shock. 

"You see...your mother volunteered herself for our experiments. You and your brother? Beautiful specimens if you ask me. However...he died in a very 'unexpected accident' didn't he?" Frisk's eyes widened as they changed to red. 

"You....YOU ASSHOLES KILLED MY BROTHER?!" The man holding Frisk, the filthy bastard who touched her, chuckled. 

"Oh no no...We just...'injured' him. The death was just a small breach in the plan." Frisk started growling, showing her teeth. 

"Breach...BREACH?! WHY YOU PIECE OF USELESS GARBAGE THAT YOU ARE--" The man slapped Frisk. Sans felt his blood boil and his eye started flaring. 

"Now now...Calm your jets, my dear. We just need to run a few tests on you and see how to make another gryphon as successful as you! If you cooperate you might even be set free after!" Frisk's mouth opened in shock. 

"MIGHT?!" Chara asked, truly angry at this point. 

"Might. You see...we OWN her since the parents are dead and the orphanage finished that shitty pretending game they had about being Frisk's tutors....We OWN Frisk. She is nothing but a mere tool that will help us bring the gryphons back but more powerful!" Sans snarled at them. 

"she is already powerful, jackass." Sans said through his teeth. The men started laughing. 

"She hasn't even developed any magic apart from changing eye color." That's when it hit him. They didn't know about Frisk being able to use magic. They didn't know about the powers she gained from the Underground thanks to her determination. Sans shut up. He didn't say anything. 

"ENOUGH CHIT CHAT! THIS IS GETTING RIDICULOUS! WE CAME TO PICK UP THE GIRL! LET'S GO ALREADY!" Said the man from the orphanage, tugging at Frisk. Frisk's eyes widened. 

"LET ME GO YOU FILTHY--" The man covered her mouth with some cloth and immediately Frisk's eyes looked around in panic until the movement got slower and her eyes rolled back, her head falling forward. 

"FRISK!" Her friends tried to get to her but the men stopped them. They grabbed them and pulled out the same cloth. 

"FRISK!" Sans tried one more time to be free but the cloth met his mouth and in the end, it was useless. He tried to not inhale but as soon as he did, he felt unconsciousness creeping in. 

'I'm sorry sweetheart'  Was the last thing he could think before he was knocked out with his brother, Chara and Asriel. Darkness swept them all in and just like that, Frisk was gone. 


When the four woke up again, they were in their dorm, surrounded by their friends. 

"Oh thank God! You all almost gave us a freaking heart attack! Where is the punk?" Asked the red-headed human. Sans was still dizzy and so seemed his brother and friends. 

"Y-Y-Yeah...w-we haven't s-seen her since w-we arrived c-called about the fact y-you four were unconscious." Alphys added. Toriel sighed and sat down with cups of water for them. 

"And we need all the details." Gaster added, frowning. Sans frowned trying to remember. Where was Frisk...? Wait...FRISK!

"FUCK! FRISK! SHIT- WHAT TIME EVEN IS IT?!" Toriel hummed. 

"It's 10 AM." Asgore said. Toriel nodded. Sans sighed in relief, only 1 hour later--

"But it's Sunday." Toriel then added. Sans spurted the water and choked. 

"WHAT?! A WHOLE DAY?!" Mettaton frowned. 

"Is there something we need to know, darling??" Sans groaned as Papyrus, Chara and Asriel remembered as well. 

"MOM! FRISK IS IN DANGER!" Asriel yelled as he jumped up, followed by Chara. Everyone in the room fell silent. 

"WHAT?!" Everyone of their friends and family said in disbelief. But Asriel was right. Frisk truly was in danger. And that didn't sit right with Sans at all.

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