Little Things

Phineas Flynn and Isabella Garcia-Shapiro have been best friends for as long as they can remember.
To Phineas, their friendship is simple. They build things together, go on adventures, laugh at the same jokes, and somehow always end up side by side.
But Isabella knows there are things she doesn't say out loud.
She notices the little things.
The way Phineas always saves a place for her. The way he remembers tiny details she thought he'd forgotten. The way one smile from him can turn an ordinary day into something she'll remember forever.
So Isabella starts keeping a notebook.
Not a diary.
Just a collection of little things she never wants to forget.
Then a new girl arrives in Danville.
Her name is Seoyeon Lee, and it takes her approximately five minutes to become Isabella's best friend-and approximately five seconds to realize something Isabella has been trying very hard to hide.
Because sometimes, the people who know the least about you can see the most.
And sometimes, the smallest things are the ones that change everything.