I vaguely remember about this so I can only give bits of the story.
-MC met a guy on a rooftop of a university/college.
-I forgot if the guy was deaf or slightly blind??
Crap that's all I can remember.Σ(  ̄□ ̄||)
maybe this? the guys deaf http://www.mangago.zone/read-manga/hidamari_ga_kikoeru/
MC had to write love letters requested by many girls. (was it because of his handwriting? or was it something else?). One day, he saw a guy gave flowers to a grave by the roadside (was it there though i forgot). Then, a ghost girl asked the MC for help to write a letter to the guy who visited her grave. MC eventually fell in love with him.
That's all I can remember.
Found it! ヾ(❀╹◡╹)ノ~ http://www.mangago.zone/read-manga/ano_ko_to_juliet/mh/c004/
To think this was the same artist who did the animation for Eve's new song "How to Eat Life"
https://www.youtube.com/watch?v=U7L-3VXAkSA