I forgot to get my viewing certificate for episode 34! That was last week. I just got it for the final episode. I love music, (I don't think this is a spoiler anymore. I'll leave a lot of space just in case.)
The beautiful piano music that played during the scene where Aqua, as Ruby, reunites with Gorou and Sarina-chan is the same as the music from Ai's death scene, right? I heard it live at the year-end film orchestra with Iga-san on piano, and it was really moving. (I rewatched episode 1 again. By the way, I'm also bad at remembering people's names. And I'm also bad at remembering faces. I can remember voices pretty well, though.)
In episode 1, Ai talks about love.

The Hoshino Family, Love Theme | 西尾一朗's post