Personally this kind of drama has just hit the right tone for me, as I was in the best mood to watch this kind of show. It is not very fast paced, full of sweetness, the music adds to the mood as well.
I think that what (or who) I liked the most about this show was definitely Riichi. Omg, so sweet, romantic guy, full of unconditional love, always waiting for Hanai no matter what. I think Eiji Akaso is really handsome, I should watch more dramas with him and I really felt in love with his adorable voice.
But the main character of Hanai Ao was sometimes so annoying! Girl, you should be happy with a boyfriend like that, caressing him, cherishing him, doing whatever he wants. But no! She irritated me so much when he was so sweet to her and she was constantly stopping him, falling asleep, asking him to leave or completely forgetting about his existence. But the thing is they understand each other, so I suppose they are ok with it.
I really liked the thing that they were showing the same scenes from the point of view of both main characters. This is something I am missing in some dramas very much!
If you want to see some heartwarming love story, especially with a sweet romantic guy, you should definitely watch it, but I hope you won't be annoyed with th FL.