That sounds like Piano no Mori you just described.piruchan wrote:
Not asking for a suggestion. I read this manga long time ago but forget the title.
Here's the synopsis:
There was an elementary school student who is a pianist. One day he/she found a piano in the forest and tried to play it. No sound came out of it. Then he met a child his/her age and that child could play the piano brilliantly. But when he/she let that child play with a normal piano, he played very poorly.
Anyone knows what I'm talking about? Shigatsu wa Kimi no Uso reminded me of this one.
Personally, I've not read it yet. I have only watched half of the movie adaptation.