Giantess Alphys X Undyne: Bigger, Longer and Uncut ★ Completed!

 

"Sweet jumping JESUS, it's so big!" Undyne gasped with awe yet again as she saw how truly massive Alphys' brain was, blissfully unaware that her own brain was actually literally about the exact same size. "So THIS is what a SMART person's brain looks like..."

 

"Wow, she really IS an awfully bright bulb, isn't she?" Undyne laughed, seeing how Alphys' brain alone was somehow generating enough bioelectric energy to illuminate the entire area around it.

 

"And her brain is SO cute and squishy too, just like her!" Undyne giggled and blushed as she leapt onto Alphys' brain stem and climbed all the way up onto the top of her brain from there, licking and kissing and sucking on it like a total degenerate creep while doing so.

 

"WOO! I'm on top'o the world!" Undyne laughed and cheered in satisfaction as she laid down on top of Alphys' brain, crossed her legs and took off her boots.

 

"OOO, dear Neptune, that feels so good..." Undyne moaned with pleasure as she dug her toes into the moist, wrinkly, spongy, fleshy folds of Alphys' brain before finally standing back up and putting her boots back on.

 

"TEE HEE HEE...that tickles..." Alphys mumbled in her sleep, drooling a little.

 

"Alright, well, here goes nothing! Yet again, GERONIMO!" Undyne yelled valiantly as she literally dived straight into Alphys' brain, completely defying the laws of both physics AND biology!

 

"OWW!!!" Alphys winced in pain as Undyne went right through the outer surface of her brain and conveniently landed right in the control room!

 

"Ah, yes, finally; ALPHYS' BEHAVIORAL CONTROL CENTER!" Undyne yelled so loudly at the sight of the main supercomputer console that Alphys actually heard her.

 

"Hmm...must have just been my imagination." Alphys sighed, reluctant to drift back to sleep as Undyne began hacking into her brain like a pro.

 

"Hmm, I wonder what the password is..." Undyne thought to herself, stroking her chin. "AH! OF COURSE! MEW MEW KISSY CUTIE!" Undyne realized with delight as she typed out the phrase "mewmewkissycutie" on the keyboard and hit Enter.

 

"Oh dear, this is SUCH a low blow, even for me..." Undyne blushed and sighed as she brought up the whole database of content stored within Alphys' brain, starting with the memory banks.

 

"Alright, so...we've got the day when she became the Royal Scientist...that time when she ordered pizza with the toppings in the shape of an anime catgirl...regret over the fact that she created the Amalgamates...the day when she somehow got every single one of her teeth knocked out in a game of dodgeball at Monster High...the day when she was about to jump off a cliff and kill herself in Waterfall, before she met me...and the day when Snowdrake's Father caught her fucking his wife...hmm, I wonder, what else is in here?" Undyne wondered curiously, clicking over into the porn databanks and immediately losing her mind as a result.

 

"OH, DEAR SWEET LORD, THERE IS SO MUCH DELICIOUS PORN HERE!" Undyne squealed like the overly obsessive Alphys fangirl she was yet again as she flipped through page after page of smutty, yummy goodness. "LITERALLY EVERY YAOI SHIPPING THAT UNDERTALE HAS TO OFFER...FOOT-FETISH PHOTOGRAPHY AND ARTWORK...ANIME YAOI AND YURI OF LITERALLY ALL SHAPES, AGES AND SIZES...PICTURES OF ME NAKED...AND ALPHYS PORN! YES! THANK GOD! THERE'S SO MUCH FREAKING ALPHYS PORN IN HERE!" 

 

"MAN, I'M SO HAPPY I BROUGHT MY MAGIC LAPTOP WITH ME!" Undyne nearly swooned with delight as she pulled said laptop out from her magical belt, downloaded over 30 solid gigs of porn onto it, then somewhat embarrassedly stuffed it back into her belt, blushing quite a bit as she suddenly remembered that she was being filmed doing this on live TV.

 

"Hmm...come to think of it, what's going on in there right now?" Alphys thought to herself, obviously referring to her brain. "Undyne had better not be downloading porn in there..."

 

"Heh...funny you should say that, because I've got just the thing for YOU!" Undyne laughed, pulling out the supercomputer's microphone and talking directly to Alphys through it.

 

"HUH? W-who said that?!" Alphys stammered, rapidly glancing back and forth around her as she hastily redressed herself and began drumming her fingers together in anticipation.

 

"It's ME, your old pal Undyne, reporting from VERY deep inside your head!" Undyne laughed, picking the earwax off of her boot and eating it. 

 

"WHAT?! Oh dear, oh dear, OH DEAR, OH DEAR, OH DEAR, OH NO NO NO NO NO NO!!!" Alphys stammered and screamed in terror, biting her nails in dreadful anticipation of what Undyne might do to her now that she had this much literal control over her.

 

"That's right, THAT'S the spirit! Now your sanity and mine can die TOGETHER!" Undyne laughed maniacally as she clicked the DANCE button on the computer and kicked back in her chair, crossing her legs and getting out a magic bucket of popcorn as the madness began.

 

"LOADING: 42% COMPLETE." the compute informed her.

 

"Undyne, I SWEAR TO GOD, THE NEXT TIME I GET MY HANDS ON YOU, I'M GOING TO FUCKING RIP YOUR BODY IN HALF AND SHOVE YOUR THROAT SO GODDAMNED FAR UP YOUR ASS THAT WHEN YOU CRAP, YOU'LL SING FUCKING BEETHOVEN!" Alphys yelled furiously at Undyne.

 

"My, my, such dreadful LANGUAGE!" Undyne teased her, clicking the ELECTROSHOCK button and smiling with delight as Alphys (and her skeleton, of course) screamed in agonizing pain.

 

"LOADING: 100% COMPLETE!" even the computer started laughing as the theme song to Mew Mew Kissy Cutie began promptly playing in Alphys' head.

 

"Oh dear god, WHY IS THIS STUPID FUCKING SONG STUCK IN MY HEAD?!" Alphys screamed and cried as she began uncontrollably dancing. "OH, FUCK, I CAN'T STOP! SOMEBODY HELP ME!!!"

 

"Life was such a wreck, every time I would CRASH INTO WALLS!" Alphys sang as she began dancing the tango in the most awkward style possible, crashing into every single thing possible and then finishing with an overly loud stomp on the ground just for added awkwardness.

 

"I had homework all day but I just wanted to play WET MY FUCKING PANTS!" Alphys sang awkwardly as Undyne clicked the PISS SELF button, causing extensive streams of piss to trickle down Alphys' legs as she stumbled dizzily back and forth.

 

"And everyone at school always made fun of me FOR OBVIOUS FREAKING REASONS!" Alphys sang as Undyne clicked the UNDERWEAR button, causing Alphys to unbutton her lab coat and throw it right off, revealing her goofy-print Mew Mew Kissy Cutie bikini and underwear as she continued dancing just as awkwardly as ever (note that THIS was also being filmed on live TV).

 

"Because my neko-chibi costume was so kawaii AND A BEASTFUCKER TOO!" Alphys sang through her nose as Undyne simultaneously clicked the UNDRESS and BESTIALITY buttons, prompting Alphys to strip herself naked, french-kiss Endogeny, deepthroat Lemon Bread, and even breastfeed Snowdrake's Mother while Undyne gleefully masturbated to her agonizing humiliation.

 

"MEW MEW KISSY CUTIE! It's a new way I'd like to be!" Alphys sang as she rode Endogeny around the room like a horse.

 

"I'm just MEW MEW KISSY CUTIE! Poor cute and adorable me!" Alphys sang as Memoryhead passionately and lovingly raped her with its many, many tentacles.

 

"I'm just MEW MEW KISSY CUTIE! I love tentacles and rape and sex!" Alphys sang as Lemon Bread chewed her up and jizzed all over her with its massive, slimy teeth.

 

"I'm just MEW MEW KISSY CUTIE! Never double-cross my ex!" Alphys sang as Reaper Bird shoved her into its vagina-mouth and...ahem..."digested" her, then spat her out onto the floor.

 

"Oh my god...OH MY GOD, THAT WAS SO FUCKING PRICELESS...OH MAN, THAT SHIT IS GOING TO GO VIRAL FASTER THAN YOU CAN EVEN SAY YEAST INFECTION!" Undyne nearly died laughing at Alphys' expense as she exhaustedly clicked the SLEEP button, wiping the hilarity-induced tears from her eyes and wanting to punch herself in the face for some reason.

 

"SLEEP MODE ACTIVATED!" Alphys said robotically, returning to her bed, curling up into a ball and falling asleep yet again as Undyne slipped out the exit to her brain, moved her eardrum back to where it was before, and finally jumped out of her ear, where she was caught in midair by Endogeny and carried over to where Alphys' vagina was.

 

"COME TO PAPA...OR SHOULD I SAY, MAMA..." Undyne drooled, ever-so-slightly regrowing herself to optimal size with the shrink ray's reverse function as she climbed onto Alphys' tail (after licking, kissing and sucking on it more than her fair share, of course) and eagerly, lovingly approached the fleshy, birthing hole in-between Alphys' legs with open arms.

 

"MAN, I ALWAYS KNEW ALPHYS WAS A PUSSY AND ALL, BUT THIS IS JUST RIDICULOUS!" Undyne moaned as she excitedly crawled straight into Alphys' moist, slimy, dripping vagina, taking in the beautifully disgusting smell, feeling and licking the soft fleshy walls, and bathing herself in the untold amounts of seminal and possibly menstrual fluid contained within.

 

After several minutes of fucking Alphys from the inside, Undyne finally gave her an orgasm, flooding the entire cavern with Alphys' warm, gooey and sticky liquid bliss.

 

"MAN, if I wasn't a fish, I swear to God I'd literally be DROWNING in semen right about now!" Undyne laughed maniacally as she played with Alphys' cum, scooped it up into her hands and gulped it down valiantly, patting her belly and burping loudly once she was finally finished.

 

"OHH, how I wish that things could just stay like this forever..." Undyne moaned happily as she curled up into an adorable little ball and fell asleep INSIDE of Alphys' vagina, in which she had easily the greatest and most orgasmically comfortable sleeping experience of her life.

 

CHAPTER 6