Is he physically not able to hear the piano, like his eardrums pop everytime (do they then heal again?) or is it just mentally?
I've only watched the first 3-4 episodes, so i don't know if it's revealed later on, but still...
Schwarzkralle wrote:It will be reavealed later, sort of at least
If you dont want to know in advance stop reading otherwise,
its completely mental that he is not able to hear the piano, because of a variety of reasons that are revealed later on.