Swapfalls Chaos (Gravityfalls / Underswap x Reader)

I think it's Swapfall??? This is my very first Book so don't expect to much about it, also I'm German and not very good in English. I hope you like it
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ This story is about that you are in
Garvityfalls and escaping the Weirgmagedon and climb MTT. Ebott
and suddenly fall in the Underground