Sans has watched as everything repeated over and over again. So has Frisk. Sans gave up a long time ago. Frisk, she still has plenty of determination. They couldn't end the loop on their own. But maybe, they could end it if they worked together? Female Frisk. Possible future Frisk/Sans.

Toriel had finally finished her project, but there was one small hitch. You only wanted to help, but now rumor has it you had other motives. It doesn't help that Sans is back and he's not helping you put those rumors to rest. Which are unfounded, of course. You would never-and even if he DID-Well, it's useless to argue with monsters who have already made up their minds. M for smuts

Sans/Reader smut, with one-sided Sans/Papyrus/Reader. Reader is female. You've been without contact with another person for far too long, how will you react when innocent horseplay on movie night threatens to tip you over the edge?

Undertale, from Sans's point of view. How do you stop boredom? Curiosity? Are good food and bad laughs really enough? Art credit to mybarbiebuns of Deviant Art; used with permission.

This is what happens when you teach puns to the impressionable human child with tons of DETERMINATION.

Nobody, no matter how determined, is infinitely patient. At least, that's what Sans is counting on.

"Greetings. You have made yourself completely clear. I, your humble servant, will follow you to the utmost..." One-shot. After scores of resets, your last great pleasure is to take up the greatest challenge and conquer him again and again. Oh? You want new content? Understood. If you're bored and you have to drag the others into it to get what you want, whose fault is that, really?

Sans discovers smoking, Frisk finds out and is understandably confused. One-shot.

Seems like just when he thought he had it all figured out... Well, he always was too lazy to prepare for the worst, wasn't he? Seeing Frisk on a hospital bed was not the reunion he wanted. Why the hell is she being so positive about this? Older Frisk x Sans. After the barrier. True pasifist run. Eventual M rating.

When a mini-boss fight heads south, Sans discovers what it's like not to give up on a promise, and Frisk discovers that you can't bear every burden yourself. Hurt/comfort fluff; Frisk helps an injured Sans. T for Sans, who had to wash out his mouth with soap afterward.

"But maybe...with what little power you have...you can SAVE something else." An extension of the true ending battle. Frisk discovers that a different kind of strength, strength of heart, is required to save those you love. Currently includes Sans and Papyrus; I might add chapters for the rest. T for Sans's dirty dirty mouth.

"No matter how old you are, no matter how badass you are if a toddler hands you their ringing toy phone you answer it" Fear the cuteness.

Frisk is tasked with waking up Sans when he sleeps in too late. Also how on earth do skeletons work? (One-shot)