It's been 10 years after the events of Summer, and Phineas must decide what University to go to. After discovering that Isabella had a crush on him for years, Phineas must reach her before she leaves for college and express his true feelings for her. Meanwhile, Doofenshmirtz has a mid-life crisis.
But for so long, you were blind.
Now it's time to face tomorrow,
And leave all that stuff behind.
Of what would our lives have been like,
If you'd just given me a sign.
'Cause I like you more than every other,
I can't believe that all this time, you never said a word.
But I must say that, in retrospect, you were being quite
And now our endless summer,
Is finally coming to an end.
I tried to make the most of every day,
But now the years just seem misspent...
Phineas created a machine
We might've been an item...
They would've called us...
I would've held the door for you,
I would've shared my umbrella.
You could've held my hair back,
( Sick with salmonella...)
We could've been together, all you had to say was when.
And though I wanted so much more,
I guess you'll always be my friend...
Isabella sees the "You Are Now Leaving Danville"
Isabella staring at Phineas.
"What'cha doin'.?Heh heh"
Phineas is wondering if he can sit right next to her.
"I actually came by to... say goodbye to you."
"I haven't seen you all summer."
"You know, Baljeet said something funny..."
"...he said you had a crush on me back in grade school."
"Oh... yeah. I had a big crush on you."
"Really? I thought I was being SO obvious."
"Absolutely clueless. Sorry."
"I sort of gave up when we got to high school."
"I think that's when I started to have a thing for you."
"Well, that's unfortunate timing."
Phineas and Isabella are about to hug.
Isabella noticing that she's holding Phineas' hands.
"Eh, I've waited this long."
"Hmmm...as a matter of fact..."
Isabella feeling very happy.
Isabella thinks about Phineas and smiles.
"That was worth the wait."
Isabella and Phineas smiling at each other.