(*^__^*) hee hee ...... I was watching it on the train, and I remember being confused, and I started to look up what it meant, and I ended up tearing up ~~ remember the ending song? hello goodbye&hello I feel like it's a disguised way of telling us the end. Meeting Parting Reuniting Again

Akane is back on the ground while Heart stays in Yagatai, and in the end credits part Heart leaves the pieces of Gwyeth with Akane, so maybe they still have a chance to see each other.

At the end of the finale, Akane smiles and says to her mom, "I'm leaving" to attend the graduation ceremony, which could be said to be a sign of how much she has grown from this adventure, to be able to smile in the face of her loss, and to look forward to tomorrow. This may also symbolize that they will be reunited again.