Demon Days

Hi, this is my first fanfic, and I would appreciate it if you read it it's not Billdip, I promise It's not the best grammer but other then that I think it's pretty good though that's just mine and my friends opinion shout out to Ti_Tide_Pod who edited this and helped with a lot of scenes and she helped a lot and helped me decide this so go and follow her! This is basicly about Dipper and Mabel coming back to gravity falls but with their parents and a demon twist. Please read it. Thank you! Also, I found this image on the internet, and I thought it was cool. I did not make it. The picture belongs to the original creator, just saying. I may make a sequel and prequal who knows. Comment if you want a prequal or sequel to this