If you loved Leave it to Kero!, try The Piano Forest
Eine Brücke zwischen einem Film, den du schon gesehen hast, und einem, den kaum jemand kennt. Das teilen sie, und was der zweite macht, was der erste nicht macht.
Was sie teilen
Both films are directed by Masayuki Kojima, and they both carry the cozy mood tag, and they sit in Animation territory. If that's the register that drew you to Leave it to Kero!, the second film will land in a comparable space — through a different lens.
cozy
What The Piano Forest is
Buster Keaton meets Studio Ghibli. A bullied transfer student stumbles onto a broken piano in the woods and meets Kai, the only kid who can coax sound from it. The piano teaches him music and rebellion.

