Secrets Untold (Nightmare! Sans x Reader) (REMADE)

Okay so first off don't read the first one it's cringe. So yeah.

After getting out of college, you move into the city of branchlot, popularized by tourists and such. You knew the place was full of history, and you wanted to study it there. The only problem is, you were none the wiser, when you learn that this city has unwritten history that nobody knew about, not even the state government...

So yeah, it's still gonna be happy-go-fluffy, heh, but it's gonna go d e e p .
Anyways here's some things you may or may not know depending on if you like reading this type of fanifction

Y/N = Your name
S/C = Skin color (If needed in this, of course)
E/C = Eye color
F/C = Favorite color
H/C Hair color