Liked:
Kitamura Takumi as Issei. His soulful eyes and his expressions were a joy to watch. He conveyed so much without saying a word. I also liked the silence when we were seeing things from his point of view. He couldn't hear, but in no way did he feel sorry for himself. I found him to be very endearing and believable.
I enjoyed most of the friendships, and the fact that they didn't skate around Issei's deafness, but he had a stalwart friend that could translate for him, and others were willing to learn sign language in order to communicate with him.
The main couple was cute, but chemistry was lacking.

Unfortunately, there were a few characters that were completely over-the-top. I notice this in a lot of Japanese shows. I feel like they want to turn things into a farce, and then move back to being serious. It spoils the mood for me.

It's an easy watch, and I'd recommend it for Kitamura Takumi.