Himawari-san is something you read after reading a hardcore plot manga.My reason is because the story flow slowly.
The character development is slow.As example,Matsuri.I still felt that I dunno this girl properly.There is also only one male character,Himawari brother.I'm not a shoujo-ai fan so I think there is not enough male character in this manga.There also new character for each episode that I thought is the reason for the slow character development.
On the other hand,I admire the art.It was drawn beautifully.I also use the art to make reference when I'm drawing my own.
Overall,it is a nice story.The reason I attracted to read this because of the
'book' themed in this manga since Himawari-san work in a bookstore.It quite normal for this kind of theme to have a slow plot,so I seriously don't mind.
I recommend this manga to shoujo-ai fans and to those who want to take a break after reading a hardcore manga.