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 23

Frisk was looking funny at the human with red head that was towering over her. The human was frowning. 

"WHAT ARE YOU STARING AT HUH?! I just have a favor to ask, sheesh....Uhh...I need you to deliver this letter...To Dr. Alphys." Frisk sniffed the letter a bit and raised a brow. She opened her tiny yellow eyes as she took the envelope. It smelled like perfume. Sans raised a brow. 

"why don'cha do it yourself." Frisk frowned and stomped on his foot. He moved it and frowned at her. 

"U-umm...it's kind of personal but since we're friends now...i guess i might as well tell her...hehe.." She said shily. Then she changed her whole demanour. 

"Hotland SUUUUCKKSSSS!! I don't want to have to go there! So here ya go. There's your reason." Frisk shrugged. Seemed legit, she guessed. 

"Oh and if you read it? I WILL KILL YOU!" Undyne said looking at Sans. Frisk frowned at Undyne and snarled. Undyne jumped up in Papyrus arms thinking she would bite her or something. Sans snorted. 

"AND SHE SAID MONSTERS AREN'T SCARY..." Papyrus let Undyne drop. 

"Thanks, Frisk...hehehe...you're the best!" Said Undyne as she gave Frisk a thumbs up as she was laying in the snow. Frisk patted her head. Undyne's eyes twinkled. 

"AWWWW- THAT WAS SO CUTE WHAT THE HELL?!" Papyrus 'Nyeh'-ed in agreement. Frisk started walking away. Sans saluted and started walking after the tiny monster. 

"i just realized how tiny you are...you're walking so slow in the snow." Frisk whimpered and Sans picked her up. They got in the boat and sailed towards the LAB. When they finally arrived Frisk knocked on the door. No one answered. Frisk slid the envelope under the door. 

"o-oh no...is that another letter...?" Frisk waited patiently. 

"I-i don't want to open it...C-can't i just slide it back...?...No...I can't keep doing this- I'll read this one!" Silence. 

"It's shut k-kind of strongly, isn't it..? Wait a second..." More silence. Suddenly the door opened. There was the anime loving scientist. Frisk was sitting down and her tail was wagging from one side to the other. 

"Hey if this is a joke then-...Oh My God? Did YOU write this letter??" Alphys said as she looked at Frisk. Sans snorted. 

"wasn't it signed?" Sans asked. 

"It wasn't signed so i had no idea who could have...Oh My God. Oh no. That's adorable! A-and i had no idea you, um, wrote that way! It's surprising too...after all the gross stuff i did..." Sans was staring in shock. Alphys was actually seriously thinking that Frisk wrote the letter?! Oh hell no. 

"excuse me, alph? hate to burst your bubble but...frisk is only playing delivery. UNDYNE wrote that." Alphys froze. 

"E-excuse me, w-what...? I-i could never- With Undyne- Oh My God....You know what? Fuck it! I'll do it!" Frisk smiled and her tail started wagging faster in excitement. 

"L-let me get dressed!" The two waited at the door for a few minutes then Alphys came in a red baggy dress. Frisk scrunched her nose up. Sans frowned. 

"uhhh...you don't have anything...you know...better...?" Frisk got up and was walking in circles around Alphys. She stepped inside the lab and got two things: 1. a headband with a flower and 2. a ribbon. She tied the ribbon around Alphys waist and put the hand-band on her head. She made two buns on her head and stepped back to admire her work. 

"W-Woah!" Sans looked at Frisk, impressed. 

"good job sweetheart." Frisk smiled and blushed at the praise. They all walked towards Waterfall where Alphys was supposed to meet with Undyne. That is when...

"O-Oh My G-God i am not ready for this...you're right...everyday i'm scared...Scared what will happen when people learn the truth on their own. They'll all get hurt because of me...But how can i tell UNDYNE the tr..truth?? I d-don't have the confidence..I'm going to mess it up...How can i practice?!" Frisk snorted. Sans face-palmed. This will be a nice long ride, huh? 

"listen alph let's calm down...how about this...? we can do a bit of roleplay to help you....ok??" Alphys nodded. 

"W-Who will be Undyne..?" Frisk snorted again and she was now full on laughing. Sans snorted as well. Alphys laughed nervously. 

"R-right...ok..." Sans finger-gunned her and started pretending to be Undyne. He called Alphys cute. She started panicking then Sans said that she kisses her. That's when...things got weirder. Alphys was full on screaming to let Undyne to kiss her.

"UNDYNE!! I LOVE YOU!! UNDYNE!! KISS ME AGAIN, UNDYNE!!"Sans and Frisk went howling with laughter when Undyne showed up and was looking at Alphys in shock. 

"WHAT did you just say?" Undyne asked. Then the human with red hair looked the blonde up and down. 

"U-UNDYNE!! I...was....just...." But Alphys was interrupted. 

"hey! WOAH! Wait a second...Your outfit is really cute! What's the occasion?" That's when Undyne looked at the laughing human and monster on the ground. Oh shit...They quickly got up and Frisk dusted her clothes. Oh no...

"Wait a second...are you two...on a date..?" Frisk and Sans looked at each other. Sans face-palmed. 

"undyne...there's three of us here you dumb--" But Alphys interrupted him. Sans and Frisk looked at each other unimpressed. 

"UHHH YES! I MEAN UHHH NO!! I MEAN WE WERE I MEAN... we were only romantically roleplaying as you!" Frisk gulped then looked up praying and doing a small cross. Sans shifted awkwardly. 

"WHAT?!" Asked Undyne, shouting. Frisk started praying harder. Sans looked away, rubbing his neck. 

"I mean...Undyne...i...I've been lying to you..." Frisk face-palmed using both hands and Sans with his mouth agape. 

Undyne's face was stuck in a creepy toothy grin as she slowly looked in Alphys direction. 

"WHAT?? ABOUT WHAT??" Frisk started hitting her forehead with her fist. Sans put a hand on his forehead as they both realized just how hopeless they both were.

"About...well...everything!" Frisk's eyes widened in horror as she saw Undyne's angry eyes lock on her. Sans was sweating bullets. 

"I told you seeweed it's scientifically important when i just use it to make ice cream; And those history books i keep reading are just dorky comic books! And the history movies...those...those are just anime! They aren't real! And that time i told you i was busy with work on the phone...I was just eating frozen yogurt in my pyjamas; That time i--" Frisk shot Alphys a "Are you for real...?" look then she heard Undyne's voice. 

"Alphys..." Both Frisk and her human companion sighed in relief when all anger left the Royal Guard's voice. Frisk changed in her bigger form and fell on her knees putting her hands up. 

"I WILL LIVE ANOTHER DAY!! PRAISE THE LORD!!" Said Frisk. Sans started laughing and the two humans who were having a moment shot her a look. She laughed awkwardly as she got up. Alphys and Undyne returned to their moment. 

"I...i just wanted to impress you..I just wanted you to think i was smart and cool. That i wasn't some nerdy loser."

"Alphys..." Said Undyne as she rubbed her head. Ok now that she thought about it Undyne was way taller than both Frisk and Alphys...

"Undyne...i..i really think you're neat and..." Alphys started crying and Undyne knelt next to her and pulled her in a hug. 

"Alphys. Shhhhh. Shhhhhhhhhh." Undyne picked Alphys up and threw her in the trash can. Frisk's eyes widened at that. Sans however looked unphased, like it was normal or something?!

"She just threw her in the--"

"yup." Sans said. 

"And we're just--"

"yup." Sans said again. Frisk looked confused and Sans patted her head. 

"you'll get used to it." He said, amused. 

"Alphys...I...I think you're neat too, i guess. But you've gotta realize. Most of what you said really doesn't matter to me. I don't care if you're watching kids cartoons or reading history books or whatever. To me ALL of that stuff is just NERDY CRAP!!" Frisk made goo-goo eyes at that. 

"What i like about you is that you're PASSIONATE! You are ANALYTICAL!! It doesn't matter what it is...YOU CARE ABOUT IT!!" Of course...Confidence and strenght combined with passion and the strenght of mind...together make an indestructible team...

"100% AT MAXIMUM POWER! so you don't have to lie to me. I don't want you to have to lie to anyone anymore...Alphys i want to help you become happy with who you are." OH MY GOD THAT WAS SO SWEET!! Sans face-palmed. 

"And i know just the training you need to do that!" Frisk spurted and Sans snorted.

Alphys peeked from the trash-can. Her legs and tail were out. The trash-can blushed. 

"U-undyne...you..will train me?" Undyne laughed. 

"Pfft, what? ME??" That's when Papyrus appeared in the background. Frisk and Sans looked at each other and face-palmed.

"Nah...I'm gonna get Papyrus to do it!!" It was the younger human brother alright; he was doing a pose with one hand on the hip and the other in the air.

"GET THOSE MUSCLES SHAKIN' IT'S TIME TO JOB 100 LAPS, HOOTING ABOUT HOW GREAT WE ARE!!" Frisk looked at the trash-can that seemed to be either pissed or sad...she couldn't tell. 

"Ready? i'm about to start the timer!!" Hoo boy...

"U-undyne...I'll do my best!!" The trash-can and the jolly human left, jogging. Undyne turned towards her. Shit...Frisk made herself small and hid behind Sans. 

"OH MY GOD!! SHE WAS KIDDING RIGHT?? THOSE CARTOONS THOSE COMICS...They are still real...RIGHT?! ANIME IS REAL RIGHT?!" Said Undyne as she grabbed her shoulders in despair. Sans frowned at that. Her world was shook hard huh..? Frisk thought about it. She nodded. 

"Oh thank god...well...SEE YA PUNK!!" Frisk smiled. Undyne left after the other two humans who probably didn't get far, since Alphys was in a trash-can after all. Frisk then started walking alongside Sans...That's when her phone rang. 

"HELLO! IF IT ISN'T MY GOOD FRIEND WHO TRUSTS ME!! THIS IS PAPYRUS!! YOUR ALSO MUTUAL FRIEND!! ALPHYS AND I FINISHED OUR TRAINING EARLY. VERY EARLY...SO I SENT HER HOME! VERY HOME...UH...NOW...I FEEL STRONGLY AND FOR NO APPARENT REASON...YOU SHOULD GO TO THE BARRIER. I HAVE ONLY GOOD FEELINGS ABOUT THIS!! GOODBYE!!" Frisk stood there in shock. What just happened...? That...that couldn't be Papyrus...She looked at Sans who looked just as confused as her. She called Papyrus again. 

"HELLO TINY HUMAN!! I AM SORRY BUT I AM IN THE MIDDLE OF TRAINING WITH ALPHYS!! IS IT IMPORTANT??" Frisk was dumbfound at that. Sans eyes were staring through her phone. That's when Frisk's reality shifted. A man stood before her, with masks and gloves she recognized. 

"Hope...what a pathetic feeling, don't you agree...? I hope once as well...But i lost E V E R Y T H I N G. Now...It's your turn as well..." Frisk's eyes widened. 

"You....HOW DARE YOU SAY SUCH THINGS AFTER EVERYTHING THAT HAPPENED?! HOW COULD YOU LEAVE ME ALONE LIKE THAT?!" The man flinched like he just now realized who he was talking about. 

"F-Fri--" Suddenly the man froze and dissapeared. Frisk stared dully at the human shaking her. 

"FRISK- FRISK!! COME ON, SWEETHEART!!" She blinked and immediately realized what happened. She blacked out. She stood up and rubbed her head. 

"oh thank god, kitten...are you ok??" Frisk gave him a thumbs up then looked at the boat in front of them. Sans sighed. 

"i know i know...let's get to the barrier now, ok?" Frisk smiled and nodded. 

This was it. The moment she will free humanity. It was time to give them what they deserved. 

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