I didn't see the anime, so all my words are about THIS series!
I think I understand what excellent means.
The actors are phenomenal, THE BEST CHOICE, they express emotions very well. During the series they apparently became friends.
I don't know the story, but from this I feel that I want to se more of it.
Musics give the story a stronger frame, and help us to live the moments from the happiest to the hardest.
On the whole we can consider it as a heartwarming wonder.
I render thanks for all the members who worked on it.