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knapsackcat · 9 months ago

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Here it is my undertale one shot fan fic I'm sorry in advance!

As ur Leaving the ruins and started the Walking through snowdin ur stopped by sans and his brother paps "hey (y/n) are u coming over to our house later ? We are gonna teach rock a new trick" sans says "ha ha ha yes of course Sans! I wouldnt miss it" u say with a smile they both smile at u and sans looks at u intently before saying "well we are going to get some nice cream with alphys and undyne right now though do u want to come (y/n)? U get excited but deflate just as fast before u say " oh no i cant i promised muffet id help her bake for todays bake sale but ill come to ur guys house as soon as im done" ^stupid responsibility ^ u think to urself and remeber u wouldnt have seen ur crush Sans today if u hadnt agreed to help ur friend papyrus inttrupts ur thoughts "Human im sorry but we must go so we arent late" papyrus says happily and instintanly "oh heh yea better get going see u later (y/n)" says sans as he waves and turns around the brothers walk away before u even have time to choke out a respone u kick urself for being really uncool and head on to help Muffet

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U knock on the brown door to the skeleton brothers house and wait for an answer instead u hear knocking back u smile and call out "whos there?" Sans playful voice rings out "nobody" u reply "nobody who???" As the door swings open u hear a loud "Nobodys home" and see sans greeting u with a smile and a hug u luagh and follow him in when he puts u down he walks ahead of u as u put ur stuff down and say " hey i dont have a cerfew tonight and torriel said if i wanted to stay the night i could as long as ur ok with it" u finish putting ur stuff down and sans says "im ok wirh it now ill have someone to eat all of this spaghetti paps made" u smile and ask "speaking of paps where is he wadnt he supposed to be here with us too?" Sans comes from the kitchen "oh Paps decided to spend the night at alphys and undyne so he could train and watch trashy anime after" ^ so papyrus is training with undyne which means im all alone with sans just the two of us^ "oh ha ok i guess thats cool well since its just the two of us do u want to watch something?" U ask and hopw ur voice doesnt sound too nervous and shakey "sure let me just leave another note on the sock" u watch him scrible something on a note and put it on the sock that he just wont ever pick up but u watch his movments carefully had sans always been this hot or was it just this massive crush u have gottwn for him u didnt know but soon u realize ur staring too late though he caught u "my eyes are up here" he jokes u chuckle embarrassed "ha i just spaced out in ur direction i didnt mwan to" u hope tht he buys it he shrugs and grabs the remote to put on something its werestling Hulk Hogan vs the BIG show u both move to sit on the couch and u accidentally loose ur balance and u land right on his lap u look at eachother and u blush a bit "u ok kid? Getting a fever or something?" Sans asks with a bit of concern u get off his lap and sit next to him instead and insist tht ur fine ans u guys watch fhe match in silence for a bit with all the tension in the air before he is back to making jokes and bold statments "i bet i could do tht" he says refering to the indian death lock "pft u could not" u say back and pushing his arm a bit "if u can u should just prove it" u joke with him but his eyes tell u he will accept ur challenge "ok he says and he reaches for u and gets u in to the position very quickly ur hearts poundinv and u are ingnoring the slight discomfort and the i told u so of sans because how can u focus when he is almost right up against ur butt was this really to prove something or did he feel it too did he know how u felt no he didnt i should just olay along " say uncle and ill stop" sans says u smile and get out of the postition and try to pin him but he is too strong and he ends up pinning u instead after a bit of a struggle

Sans Playfully teases u becuase of the wrestling "do u want to have a bad time because this is how u have a bad time" u sundenly realize how close to eachotehr u guys are and can feel his breath on u as ur bodies are pressed togather he notices that u have noticed u stare in eachothers eyes his starting to glow with determination u blush and try to move ur face away but he grabs ur chin and stops u and he kisses u soft at first then rough and u can feel his bone getting bigger and poking ur thighs but u just keep goinv uts making u burn hotter and just when ur about to wrap ur legs around him he pulls back and hurtidly gets off u "shit i. Im s . S. So sorry" he starts to panic a bit and is on his knees in fromt of u still laying down " i wasnt going to u just looks so beautiful (y/n) and i ah what am i saying" ^ im not going to lose this chance^ u think to urself and u get uo fast and kidd him hard toopling the two of u over on to the floor we embraces u and u kiss like tht for a while u can tell his boner is fully erect and ur ready for it u tug at his black shorts and his blue jacket and he takes them both off with our breakinv the kiss u take ur clothes off too and he pulls away from the kiss again " wait are u sure u want to do this ???" He asks with a look on his face u cant read "do u not want to?" U ask "of course i do but isnt this ur first time(y/n)?" Shit u forgot itvwas ur first time u had been so excited to Jump His Bones u didnt remever about urself " y-yes its my first time" u say shyly how could he bring up that ur a loser virgin with no experience and how could u tell him now that when he kissed u it was the first tome anyone ever has he sighs a breathy sigh "hey ur first time should be special and im just not the guy thats gonna be able to make this special for u im so-" u cut him off "this is special because im doing it with u and i think thts enough u dont have to do anything special or different tell me what u want me to do and ill do it" his eyes widen and he smirks "u will do anything i ask u to do huh? And u really dont mind me taking ur flower?" U nod and look at him hopeful he sighs and puts his head in his hand "well (y/n) if u really want to do this we can but u have to do everything i say understand slut" ur surprised at him calling u a slut but u soon feel ur insides heating up as he grabs ur face to kiss u again before u can answer him u melt and when he pulls away u nod blissfully " ok yes ill do whatever u say" he smirks and stands but ur still on ur knees now he gets in front of u "good then suck it" his dick now very hard just from kissing u start trying to do what he asks but u arent doing a very good job u can tell and he barks another order at u " open ur mouth wider u have time to get better at this for now im just gonna fuck ur throat " and with tht little warning u open uo wider as he trusts in to ur mouth hard he holds ur head in place so it doesnt move and he keeps going and he says "im going to cum in ur mouth and ur going to swallow and if u dont ur gonna be punished do u understand" u look up at him with no way to response since ur mouth is full of cock but it looks like he understokd anyways and he takes both hands and puts them on the side of ur head as he thrusts one more time and u can feel the warn thick cum filling ur mouth and throat he trusts a couple more times for good meassue befkre taking ut out he shuts ur moutn for u gets down to ur level looks u in ur eyes and says " now swallow slut" u do and it doesnt taste very good but u do it anyway he smiles at u and pats ur head "good girl" u cant believe u finally got to do something like this with ur crush ur so happy and even happier when he says "hey lets go to my room"

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U followed sans to his room its a bit dirty but u don't mind he looks at u and asks "(Y/N) do u trust me to please u?" Ir flushed and u say " yes i do why" he smirks and leads u to the bed which is really just a matteress and guids u to lay down u watch him walk out of his room and ur now naked on his bed ur mind is racing and just not sure what will happen he comes back in the room wth a box and asks again "do u trust me" u respind "yes sans od course i do why?" He smirks and pulls out rope and silk ties and blindfolds before u know it Ur tied up and gagged nervous about whats about to happen and shaking with excitement at the same thing sans chuckles "i guess with all the tension this was BOUND to haopen huh" he says with a small laugh but its diffrent then usually its more nervous u smile at least as much as u can with the gag in ur mouth he nervously moves to the bed ^how cute he is nervous to finally take me for himself bevause he doesnr want to make me feel badly about this^ he slowly carreses ur leg and trails up to ur thighs and breathes a deep breathe he opens ur legs for u and starts to flick his tounge inside u and u struggle at the feeling it feels good but its weird because u havent ever felt it before and he keeps going until it feels so good u stop thinking then u start to cum and try to tell him to stop ^its too much^ u think and try to say but ur gaged and its just muffled noise mixed with moans he drinks ur cum and comes back up with his face dripping u get embarrassed and blush and turn away quickly he takes ur chin and gentlely makes u look at him "loom at how wet u are" he teases u try to mive ur head away again but he keeps a firm hand onur chin "are u ready for me to fuck u (Y/N)?" Sans asks ^finally^ u think but u nod eagaely to him and he ungags u u take a full breath of air in " i want to hear u moan for me while i use my dick to please u so make sure ur nice and loud" he says as he adjusts himself between ur legs he rubs his hard cock on ur juices to get lubed up and says "i knoe since its ur first time i should be gentles but i wont be" he shoves it in and u feel electricity in ur body he is thrusting steadily and making small gruntinb noises ur moans and ur still tied up and cant do anything but let him keep fucking u like this it feels good and ur losing ur head in the moment suddenly he stops and u feel tugging at the rope and ur hands and legs are free and he orders u again "get on ur hands and knees im going to fuck u from behind now" u listen like the good slut u are and he sticks it in quickly and keeps fuckinb u he slaps ur ass hard u let out a yelp wirh ur moans and he says "fuck yes keep make noises like tht for me and im gonna cum" u feel urself tighthen around his dick as u cum all over it and he cums too deep inside u and fills u with his determination and u both collapse in bed next to eachother with his cum pouring out of u he leans over and kisses u "u did great for ur first time (y/n)" u weirly look at him and say " i love u" he kisses ur forehead and says "i love u too (y/n)

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