Forest of Piano
ピアノの森 (original)
Kai grows up playing an old piano discarded in the woods; Shuhei's father is a famous pianist. Their chance meeting transforms their lives and music.
Starring Soma Saito, Natsuki Hanae, Junichi Suwabe, Hideyuki Tanaka, Mariya Ise, Yuichi Nakamura, Aoi Yuki, Koji Yusa, Katsuyuki Konishi, Bin Shimada
Watch "Forest of Piano" on Netflix released in 2018. It's a animation and comedy show, and has a rating of 7.3 out of 10 from Imdb which is usually fine for this kind of show.