It All Makes Sense At The End

After everything; after Hannah's many failed and one successful attempts at dating Grace; after Hannah and Grace break up, realizing they want different things; after Grace dates and eventually
marries Chester; after Hannah dates and eventually marries Angela; after Grace and Hannah grow apart; after Hannah and Angela have two children named Lindsey and David; after Grace and Chester divorce; after Angela dies in a car crash; after a newly single Grace reaches out to a broken and depressed Hannah; after they reconnect and help each other heal; after the holy trinity is together for the first time in ten years; after they realize they all grew up; after fifteen years has passed since Grace and Hannah broke up; after Hannah asks and receives a sign from Angela that it's okay to move on; after Hannah's children push her to move on; after Grace finally accepts her bisexuality; after all that:

Hannah and Grace do something that most of their fans gave up hope on years ago.

Nearly twenty years after the Hartbig ship first sailed, it finally docked.