Corruption: Not Quite Home

After your long adventure in Underfell, you're finally able to return home. Core Frisk sends you back to your original timeline, but... Something's off. Sans is bouncing off the walls, sporting a bright blue scarf and battle body, while Papyrus is lazing around without a care.
Looks like this is going to be a lot harder than you thought...

This story is the official sequel to ParadoxAri's book, "Corruption". If you haven't read it yet, I highly recommend reading it before reading this. It's a really great story, and it will explain everything you need to know before reading this one.

~Disclaimer: I do not own Undertale