I remember I read it from one shot until the end of the manga. the only thing left was my tears on the manga.
the story is about Ishida who try to redeem himself by being friends with Nishimiya, a girl who had been bullied by Ishida and his friends. beware of the feels that will haunt you and leave you crying so much.
the art is gorgeous from the start, especially the hands and the background. because of sign language is the main theme, the way hands drawn are so flexible and natural.
I give the characters score 8 because I hate that Kawai girl so much, I wish she didn't exist lol. but that should give you a picture how the characters feel so realistic. everyone has their own reasons, even why they bully Nishimiya in the first place (not that I'm justifying their actions). and I especially love Nishimiya sister.
overall, the arts, the atmosphere, the tension, the characters and their development, and of course the feels complements each other and that's what this manga is excellent.