Undertale, Classics AU, meets alternate versions of Sans, but things take a turn between scercts and trust between them.

undertale sans x underfell sans in highschool.

brothers don't always get along perfectly. sans and papyrus have an argument that's consequences will change both of there lives. can papyrus live with the regret?

Frisk's fall was rewinding over and over again, It's the same thing for everyone, no one feels the difference in the days. But, a certain skeleton does. Over the years, Neutrals, Pacifists, and Genocides were freely repeated and no one can take note of the pain the skeleton has felt. He keeps a smile on his face even though he suffered. Of course, all of these things come to an end. Wanna know why? Well, Just come.

Undertale truly one of a kind, no matter how many AUs or alternate universes it doesn't have any rivals that can compare to it. Many agree with me, many don't, but we all know the same thing: you are never supposed to mess up an original, and that goes for Undertale too. Undertale is the original of many copies, so it's natural that people don't want to mess with it, but what if a major glitch happens in the original universe. How will it affect the other universes? Is it just a glitch, or is there something more to it? Is there a way to fix it? Well, you'll have to read to find out.

Cover isn't mine. This is my AU, and my story. If you don't like it, feel free to ignore/leave. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It was a normal day in Underfell. Monsters fighting each other, monsters getting drunk, and Sans slacking off. It's all normal until Papyrus finds Sans running around, panicking. Papyrus has never seen Sans this worked up, even when he beats him. What's going on? And why does Sans have a tail?!

This story will be about Sans protecting all the AUs and helping the Star Sanses

YOLO WASSUP MAH PEOPLE!! K so I'm working on like 4 or 5 other stories so I hope u enjoy this one too XD Actual description: There's 2 new teens at Snowdin highschool and their names are Red (fell sans) and Edge (fell papyrus). Sans finds Edge's brother slightly cute. Will he try and deny his feelings? Or accept them and will Red feel the same? Find out right here in this story!! :3

i credit alexiafire18 its sin okay.. TS,sin.