Cassy

Cassy is a 2019 Canadian drama film, written and directed by Noël Mitrani. The film stars Natacha Mitrani as Cassy, a young girl whose mother has recently died but who has a difficult and emotionally fraught relationship with her father, and who connects with her music teacher Maya as a new parental figure.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.