Friends With Benefits; in theory, it sounds perfect. All the "fun" with no repercussions, no commitment, and no strings attached. If Isabella and Ferb decided to test this theory, nothing would change, right? Isabella would still love Phineas and Ferb would still love Vanessa. So why do the two of them just keep getting tangled together? The theory is about to be challenged.

They say true love doesn't have an expiration date. But what do you do when your true love has been with someone else for seven years? This is Isabella's journey as she accepts the things she cannot change and learns that her best chance at happiness lies outside of Phineas. Sometimes it's best to let go of the person you used to be. Ferbella.

Phineas realizes he likes Isabella after she leaves him be and passes on.

Isabella Garcia-Shapiro would never give up on Phineas Flynn. Which is why she asks him to keep in touch with her through email after she moves. Now age 21, Isabella returns to Danville, madly in love with her longtime pen pal. But, is Phineas really the guy for her?