Ep. 1a: The Frogs Lose Their Marbles

"Can you imagine if Marcy got stuck with us instead of Anne? We'd be set for life!"

We all know the story of Amphibia; three teenage girls find a magic music box, get transported to another world, and have to find their way back home. But what if something was different? What if the three of them didn't end up exactly where you'd think they would?
In this AU, Sasha lands in Newtopia, Anne at Toad Tower, and Marcy Wu in the valley of the frogs. Every chapter corresponds to one episode, regardless of that episode's length. Also...
DISCLAIMER: I do not own Amphibia or its characters; those are owned by Disney.
SPOILERS: Despite being an AU, this will still contain spoilers for canon Amphibia. You have been warned.