Will have swearing cause Underfell isn't the nicest place to be. But... there are feels in every universe.

Try to enjoy. After re-reading this I-

I won't ruin it for you.

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Chillby passes you the bottle of ketchup you asked for and gives you a distasted sound before walking into the back room. You sigh as you slam your head onto the bench, letting yourself stare at the ketchup bottle. It brings back memories of your past resets, especially the Sans that you had once loved but then had lost. The tingle of the bell is hearable from behind you but you don't move, you no longer care who hits you or insults you in this horrible world.

"pet! what the hell are you doing in this dump!?!"

You don't even bother to answer him, you just grab a tight hold of the bottle as you continue to stare.

"pet!! fucking look at me when i'm talking to you!"

Your grabbed from behind and are forcefully pulled around, your now face to face to Sans. Well... this universe's Sans.

"why the hell are you crying!?! i haven't even hit you!"

"It's not about you. Don't worry about it."

He growls in your face but for once you don't flinch, you don't even care if he hits you again. Maybe he'll even kill you and you can get your other Sans back. You just stare down at the bottle in your hands, memories come flooding towards you but your able to block them before they overload you.

"what the hell has gotten into you!?! your staring at a fucking bottle of ketch-"

"YOU DON'T GET IT! YOUR NOT HIM! YOU JUST LOOK LIKE HIM! HE MADE ME SMILE! LAUGH! HE HATED IT WHENEVER HE HAD HURT ME! BUT YOUR... your not even... your... not... Sans..."

You throw away the ketchup and you walk towards the door, ready to head back home and get yelled at by Papyrus. You miss the Papyrus that would act silly just to see your smile, always was positive, loved cooking speghetti and had loved to hug you when you had a nightmare. But just like Sans, he was gone. Your knees shake and before your able to reach the door you collpase to your knees and sob uncontrollably, you don't know what to do anymore.

"s-so... they're... not just dreams?"

Your sobbing slow down as you look back at the skeleton, his usual single red eye has been replaced by a white blimp in both, his hands were also shaking violently.

"i... was nice? there's another me? which is it?"

"U-Um... both. Kind of. I don't really fully understand it."

Silence hits the two of you like a gong, it startles the both of you out of your shaking. 

"so... you miss him pet?"

"Y-Yeah. I... I loved him..."

He sighs and walks towards you, his eye returns red but his hands continue to shake. You look directly into the red of his eye as he stares into your own.

"how? how'd you die?"

You stare at your feet, you don't want to repeat the events but you believe that he deserves it.

"We were in a bad timeline. A kid named Frisk was possessed by a dead child named Chara and was killing everyone in the Underground, including Papyrus."

You could swear that a flash of red flame came from his eye, but you choose to ignore it.

"Sans was mad as hell. He fought Chara but eventually... he died. I followed not too soon after."

He looks at you, his hands were shaking furiously now but he pretended as if they were not doing so.

"i can get you back. papyrus'll probably kill me for it, but i can."

"Huh? Not if you'll die because of it! Anything that-"

"kid!"

You stop as he shouts that single word at you, it startles him as much as it had to you.

"i... had always felt bad for hurting you. but i hated it, you were a fucking human! i was supposed to hurt you! i was supposed to kill you!"

He was yelling directly in your face at this point, you don't move back but instead you sadly smile at him. Tears fill up his eyes but he's holding back, just how he had grown up to be.

"pet... i don't care what happens to me. as long as your happy-"

He rushes at you and pulls you into a hug, his hands were still shaking.

"i'll be fine. just... accept it. i can't do it unless you tell me to."

You bury your face into the fluff of his jacket, he may not be your Sans but inside he was still like him. He pulls you away and sternly looks you in the eye, his usual ferocious glare was moot as the shaking of his hands told you how scared he really was.

"Only if you run. Don't let them kill you. Wait until another human falls and leave for the surface then. Please! Promise me you won't die!"

His head looks at the ground below him then back at you, the white glims had returned and his smile seemed kinder.

"i promise. so... you ready?"

You nod and he releases you, you watch him walk towards the bar with shaking hands before turning back towards you.

"i'll make it quick for you. goodbye pet."

"Th-Thank you. Goodbye."

Your eyes close and a second later pain shoots through your body. Your stomach, shoulders, chest, head, they all are pierced by bones and shot by Gaster Blasters. You smile as the pain fades and the darkness welcomes you, along with two yellow words.

*True Reset                                          *Continue

Your hand shakily hovers the words 'true reset' as guilt begins to cloud your mind. You slam your hand down before you change your mind, you know what he'll do. Unlike the Sans you love, the Sans who had just killed you doesn't keep his promises.

"Th-Thank you so much..."

The feeling of warm sun on your skin makes you smile, you were too used to the coldness of Snowdin that you've forgotten how much you've missed heat. 

"please! please! please!!"

The running footsteps of someone makes you sit up quickly, the voice sounds incredibly familiar.

"don't be chara! don't be dying! don't have forgotten me!"

You stand and begin running towards the panicing voice, the voice you've heard in your dreams so many times that you've almost forgotten if it was a figment of your imagination or if it was reality. You run through the echoing Ruins that are throwing the sounds of crying at you, he's given up. He believes that your not here.

"SANS!"

You continue running as fast as you can until you bump into something, you knock it over and roll around the ground with it until you stop completely.

"(y/n)!?!"

"Sans!"

You look deep into the skeletons eye sockets just before kissing him deeply on the teeth, you've spent too long without him. Tears freely flow from your eyes as you pull apart, Sans had landed on top of you when you had crashed into him and now he was blushing blue.

"why are you crying?"

"I... I'll tell you about it another time. I guess i'll have to meet everyone again."

"heh... easy. i've been coming here every day for three months waiting for you. i've been telling everyone that i'm meeting with someone and now... here you are."

Tears form in his eye sockets, all you can do is hold him. The smell of ketchup radiates from his jacket as you dig your face into it's fluff. You never want to let go.

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He had found out quicker than I had thought, Chillby must have told him the dick. Looking down I see blood slowly leaking from my stomach, a bone also penetrating from it. He had left me afterwards, all he said was that I was dumb. But you know what? I am. I'm dumb for not keeping the kid for myself, she was kinda pretty. But it's too late for that, my own little brother had left me for dead and i'm lying in a pool of blood in my own bedroom. 

"ain't that... 'punny'?"

That... that felt good.

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I'm crying. I'm fucking crying at my own story. HOLY SHIT ME!

-.- I wanted to write a Sans X Reader and this was it.

Oh. My. Gohd.

I'm gonna eat chocolate, drink soda and watch a shit ton of YouTube. 

HOW COULD THIS HAPPEN TO ME!?! I'VE MADE MY MISTAKES! GOT NOWHERE TO RUN! THE NIGHT GOES ON!

Best song for this. Don't know why, just feels like it.