Can't remember a movie

Hi! So, many months ago, back when I dind't actually watch animé (I think) I remember waking up to go to school... I turned on the TV, I was zapping, and there was an animé movie

It was a romance story kinda related with music. I remember there was a.. hmm trumpetist boy I think. He made the instrument
Umm I don't remember...
They were young... The girl travelled a lot par bicycle. It was the girl who (mostly) wanted to do the first steps, get to know him, etc
I think it was a hearthwarming story