I'm only 3 episodes in so far, but this is really good. It's nice to see a wholesome romance that's not In high school. Assuming this review is still up when the series finishes, my opinion stands.
Anyway, it's so cute. It's already up there with my favorites.
The art is very nice, and the show does a good job with allowing us to understand the sign language.
My only nitpick this the use of the "overprotective childhood best friend" trope, but it seems like that could be solved soon.
Back to positives, the character design is great, and it's not super fanservicey.
TLDR: it's super wholesome and pretty, give it a shot.