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aj73847 · 5 years ago

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⚠️WARNING⚠️

This is an Underfell!Sans and Frisk tickle fic. All characters in this story are portrayed as 18+ and of legal age in the US. Also some foul language. If you have any other concerns don’t be afraid to write me. Also this is my very first tickle fic so don’t be to harsh. I know it’s probably bad compared to others work but I worked hard on this and I’m filled with determination!! Now... ON TO THE FLUFF!! <3

============ Admit It ============

It was a cold winter night at the skelebro house in Snowdin. Papyrus being the second in command in the royal guard had some business to attend to that night, so he would be gone until early the next morning. Which leaves Sans and Frisk home alone.

They were both sitting on the couch facing the tv, with one on each armrest leaving space in between them.

“So, what do ya want to watch?” asked Sans.

“Mhm.. I don’t know. How about MTT Cooking Show?”

A big but short chuckle came from the skeleton

“HA, I’d rather tear at my eye sockets then watch that privileged asshole.”

Frisk stares at him with a blank expression

“Ugh. Well I’m out of ideas. Let’s find something else to do.”

Sans groaned and replied

“There’s nothing else to do.”

“Of course there is! We just have to look around. You don’t have any board games or video games lying around?”

Sans laughed again

“Even if there were something like that, I wouldn’t participate. Childish stuff in my opinion. Let’s keep looking on tv.”

He resumed flipping through channels as Frisk slumped in her chair.

“Childish stuff.” She thought. “How could he say that? There’s so many things he does that are childish. Like his terrible puns. Or his...”

Frisk paused her thoughts and then thought of the perfect thing to do that evening.

She slowly began moving closer to Sans, who wasn’t paying much attention to the world around him, until she was right next to him. She laid her head on his shoulder and hugged his arm, trying to act natural. Sans stopped fiddling with the remote and looked down to see her on him. He began to blush.

“Hey there kiddo. What uhh.... you ok?”

She looked up at him and said

“Yeah I’m fine. I just wanted to ask you something.”

He began to blush a little deeper.

“What’s up?”

“Are you ticklish?”

He froze.

He was incredibly ticklish and only his brother knew of his cursed weakness. Not that they do that anymore. Only as children. But Sans knew he was still ticklish from the numerous times he accidentally tickled himself. But he wasn’t willing to find out just how ticklish he really was.

As he was trying to think of a good answer he didn’t realize he had spaced out.

“Helloooo earth to Sans. I asked you a question.” He came back to the present.

“Huh? Oh o-of course not! Like I said earlier, childish stuff heheh.”

He began to sweat and got very nervous as Frisk put her hand on his chest.

“Mmm, somehow I really don’t believe you.”

She gave an innocent yet devilish smile. He sweat even more. He began to laugh out of nervousness. How was he going to get out of this?

“Listen doll face, I’m telling you I’m not so, just take my word for it or you’re gonna have a bad time. Capiche?” He said defensively.

Frisk processed what he said, then spoke.

“So you ARE ticklish..”

Did he really just give himself away so easily.

Before he had anytime to react, Frisk grabbed him and pinned him on his back, sitting on his waist and putting his hands under her knees, immobilizing him.

If only she hadn’t started training with Papyrus. She was a lot stronger than he remembered.

“HEY WHAT THE HELLhehehe! Quit it!”

He started to giggle but held his composure trying to act as tough as possible as Frisk started prodding his ribs.

“Awww what a cute lil laugh! I always thought your laugh was adorable.”

“G-Get off a mehehe!” He was beginning to break. He was trying so hard not to laugh but he was so incredibly ticklish.

“Hmm I don’t know, this is really fun. Plus you haven’t admitted it yet. I’m not stopping to you admit you’re ticklish.”

“SCREW YOU FRIHEHEHESK!” Little tears were forming in his eyes as he was straining not to laugh.

“Suit yourself. “ and with that she went into full blown tickle attack mode. She started scribbling at his ribs and then his sides, rotating between each spot. Sans went mad.

“AHHHAHAHAHA STAHAahaHA AHAHAHA! FRISKKAHAahahaahehehe.”

“Well well well, would you look at that. The big,bad, tough guy Sans, taken down by a little tickling. Who’d a thunk!”

He struggled to say something but couldn’t. He was laughing too much. And was weakened by the tickles to pull himself from her grasp.

“HAHAHHA STAHAHAHAHAHAHAEHEHEHAHA!!”

“Just imagine if all your little friends down at Grillby’s knew you were this ticklish. But don’t worry. It’s safe with me *wink*”

She was enjoying herself way to much. But it was worth it. Sans was always a sourpuss. He needed to lighten up a little. Have a genuine, non shit eating smile.

After about three minutes of tickling she slowed to a stop. He began breathing heavily, aside from the lack of lungs.

“Soooooo, willing to admit to you’re wonderful little weakness?” She said, still on top of him.

“Frisk, please...” He tried to reason but to no avail

“That’s not what I asked so you must want more. I can happily oblige!” As she said that she began to lift up his shirt, exposing his ribs. He started to panic.

“Please Frisk dohohont!!

She began to very lightly trace his ribs, which seemed to be his worst spot she had covered so far. “All I need to hear is those magic wooords.”

“NO! Either gehet off me or *mhph* or there’ll be serious hehehell to p-pay.” He said trying to threaten her with an angry grimace,despite that fact that he was giggling like crazy.

“Hahahahahah *sigh* oh Sans. You’re so cute when you’re angry.” Then she started tickling his ribs at full force.

“AHH AHHHHHAHAHAHA NO NO NO pleASEHEHEEHEHSE AHAHAHAHAH!!!!”

He wriggled and writhed at the feeling of his bones being scratched.

“GAHAHAHAHA FRIHEHEHSK PLEASE STOP IT’S TOHOHO MUCH AHAHA!!

After what seemed like an eternity she finally stopped, giving him a break.

“Wellllll I’m getting kinda bored at this spot. Wanna tell me where else you’re ticklish? Or shall I find out myself.” She said with a grin. “Or you could just admit to being ticklish and we can be done. Easy as pie!”

He thought for a moment. Scanning his options. He hated the idea of admitting because then he’d be her laughing stock all the time. But then it would stop.

“Listen, baby, you don’t wanna hurt your dear ol’ friend Sansy, would ya? Why don’t we find something else to-“

“Shut your trap Sans.”

Sans looked at her in shock. She’s never told anyone to shut up, let alone him.

She put her hands on either side of his head and got inches away from his face.

“I know I’m the nicest person in the underground, but I’ve also learned not be played for a fool. So I guess you really haven’t learned your lesson, have you?”

This whole tickle thing has twisted her mind to be so cruel in the best way possible. Maybe this is her way of letting out her anger.

“So, about those tickle spots.”

He thought about it before giving an answer he was instantly gonna regret...

“Never.”

“Welp. Alrighty then. You asked for it. Let’s see here..” she scanned for her next part when she thought about something unusual.

“How about we try down here first.”

She grabbed at his spine, instantly putting him in hysterics.

“NONONO NOT THEHEHERE NOT THERE HAHAHAHAHAHHEHEHEHHAHAHA!!”

He laughed and laughed before she stopped abruptly. He put his head back and breathed in and out heavily. What could she possible do next that’s worse than that. He then felt her shift positions. She was now facing his feet. He sweat profusely.

“You know what? Forget about admitting, this is just to much fun! Ohhhh boy do I have a good feeling about this one!” She said happily. He tried to divert her,

“W-well HA jokes on you, my feet aren’t ticklish.”

He really hoped that would work. No shame in hoping.

“Oh.” She began “well if you’re not ticklish there then you wouldn’t mind if I test it then?”

It felt like his SOUL shattered into a million bits.

“Well I-I uhm. Sure!? (Why’d I say that, such an idiot!)”

“Great!”

She began slipping off his slippers and then started tracing little circles on the bottoms of his socked soles. His legs began to twitch and he clenched his sharp teeth.

“Hmm yep... n-not ticklish t-there, hehe”

Then his socks came off. Now he was in trouble.

“Ok, OK listen!! You’ve had you’re fun. Now quieheheht it heheh”

She began running her fingers up and down his soles. Very gentle but affective.

“You know I think you like this. Because if you didn’t truly like it, you would’ve teleported away by now. How cute.”

Shit.

“I-heheh- I dohohnt like it.”

“Mmm I think you dooooo! So embarrassed by your own kink. Come on Sans. I know you like to laugh but this is just silly! I wouldn’t think you were weird if you did like it” she continues to slowly tickle his feet, driving him crazy.

“I DOHOHONT!!”

“Fine. Have it your way. I have a new game. Admit you like to be tickled... OR SUFFER!!”

She began vigorously scrubbing away at his feet. He went insane.

“NOOOOOHOHOHOHOH STHAHAHAHAHAP STAHAHAHAHAP OH MY GAHAHAHAA. STAHAHAHP NOT THEHEHEHERE!!! ANYWHERE BUT THEREHEHEHEHEHE HAHAHAHHEHEHHAHAHAHA!!!”

She tickled for a couple minutes then stopped and grabbed hold of his big toe.

“Ooh now what do we have hereee!

This little piggy went to market-“

He was so anxious. He hated this fucking game. She continued in a cutesy teasing accent

“This little piggy stayed home. This little piggy had roast beef, this little piggy had none, and this little piggy-

She got interrupted by Sans’ pleading.

“Frisk pleahehese. I hahate being tickled!!”

She stopped. She turned around to face him, he saw that her face filled with glee and she stared down at him in aw.

“You admitted it! You finally admitted you’re ticklish.”

He looked at her in complete and udder anger (well maybe embarrassment instead of anger haha).

“Are you FUCKIN KIDDING ME!!! It’s pretty fuckin obvious!” He said, crossing his newly freed arms.

“So are you also going to admit you liked it?”

She chuckled as she saw him shrivel into an embarrassing mess, trying to hide his bright red face.

“n-no, i don’t.”

She laughed

“That doesn’t seems so convincing. Shall we continue?” She went to attack his feet again but he yelled out,

“NO NO NO, OK ok..FINE. It was “fun” I guess. Passed the time anyway.”

She dove into him in a deep hug, practically crushing him. He grunted

“Awww I knew you did! Now we can have some fun when Papy isn’t home hehe.”

He became wide eyed

“No no uh there’s probably some other stuff we could do. Like those board games you were wantin to play..”

She looked at him and trying not to laugh she said,

“Oh shut up Sans ~smooch~”

She had kissed him on the cheek and he became as red as a tomato.

He hugged her back and they both fell asleep together in the couch.

The next morning Papyrus came home to find them passed out. Frisk woke up and saw him there. She whispered as to not wake up Sans,

“Hey Pap, how was your training?

He whispered back,

“BORING. SOME OF THE BULLSHIT THESE MONSTERS PULL TO GET INTO THE GUARD IS RIDICULOUS. HOW WAS YOUR NIGHT WITH SMART ASS?”

Frisk chuckled,

“Oh it was nothing. Sans was laughing for what seemed like hours”

“AT WHAT? I KNOW NOTHING GOOD WAS ON.”

“Well, you guys gotta admit. I’m a pretty funny gal.”

============ Epilogue ============

Thanks so much for reading my fanfic. If you like what I do please send some likes my way and follow me back. It can be hard to think of fun a creative ideas but I manage with the tools that I have available. I’ll be accepting requests but just be aware that I don’t reply to them all and ask that you please forgive me. I’ll get back to as many as possible.

Again thank you for reading,

*hugs and kisses*

-AJ

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