First day

This took place a few year after weirdamageddon, they are now 15. An unexpected guest arrived and swept Mabel off her feet. Having an over-protective brother might give her some trouble. Drama, Romance, Sadness, Loyalty... all in one.
Note:
-I do not own Gravity Falls characters and this fan art.
-I might make grammar mistakes

I was inspired by a lot of authors, thank you :D