The art is really pretty, the uniforms and clothes are well designed, characters have personalities and the story is quite fun to watch... But put that aside, there are too much characters and some of them are quite redundant, not to mention the meaningless POVs and suppose to be touching stories... Uhm, not much for my liking but it's still good I guess...
But not like ForteAtrox, the person I hate the most in this series is Yori, not Nai. Nai is my fav one. Just like you said, Nai is innocent, but he has a reason for that. He is not human, he is an animal, a small and extremelly weak animal to begin with, so what more could you expect an animal to behave? I find him sweet and lovely.
But Yogi is opposite. He is innocent, childish, girly, clumsy, cheerful, emotional... kind to everyone and get scared easily, even more than Nai! I want to tell you that I actually don't find these guys Hatori or Akari hot at all, I've always fond of cute and kid-like guys, but Yogi is just too much. He had cross the line and became really annoying after each chapter. Not the main character, yet he appears sooooooo much, and the shouen ai-ish he give off doesn't annoy me any less . I admit, I like shounen ai, but can not with some unreasonable character like this.
p/s: ah well, I also love Gareki. But who wouldn't tho? 🙂