The story was simple and straight forward and the development of the romance between the two main characters took place in a relatively logical and gradual way; so don't expect the main duo to jump in bed with each other right off the bat. At one point I even questioned why the tag "Yaoi" was added to this manga.
What stuck with me most was no doubt the art, very beautiful. I'm not sure what it is, but Takarai sensei's style gives off a very "tranquil" vibe, fitting in nicely with the shounen-ai genre. The scenes which had to portray the characters in a state of shock, embarrassment, etc. still kept in line with the normal drawing style: so no over the top facial reactions or sfx.
The main duo was solid, although more time was spent on the background of one. Even though more time was spent on the past of one of the main characters, the other main character could still hold his own. Mainly because he was portrayed as such an honest and charming guy.
I think I might've enjoyed the story more if I had found better scanlations for some of the chapters, but that's just a minor complaint. If you're relatively new to this genre or just feel like reading a cute romance manga (if you don't mind the lovebirds being both guys), you should give Hana no Mizo Shiro a try.