Is This Real? - billdip fanfic rewritten

(This book is VERY old and is currently being rewritten) Dipper Pines is a young adult male who has recently gone back to Gravity Falls during his gap year to spend some time with his Grunkles before deciding on what to do with his life. But after summoning on old dream demon enemy in his first week back, he had a lot more on his plate than just his career. Is the new demon he sees really what he seems?