I think i read something like this before where a girl was a burden in chorus because so was deaf.
Koe No Katachi
Story of a guy who bullies a deaf girl in middle-school and ends up being bullied himself after she transfers out of school.
Years later, on the verge of suicide, he tries to redeem himself by meeting her and trying to make friend with her before killing himself. It was a oneshot then became a series. In the series, a whole crew of people from the same middle-school reunite and the past comes back with a vengeance. Drama and romances ensues.
It's a touching story really. Can't say I found the ending very satisfying though. A nice ending, but not conclusive.