Chapter 1

Cover isn't mine. This is my AU, and my story. If you don't like it, feel free to ignore/leave.

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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?!