Kako is one of my favorite mangakas of all time. I love all of her works. Kiss/Hug and Ai Hime - Ai to Himegoto being my favorite by her and also a part of my top 20 mangas list. She's brilliant.
The romance is so real and beautiful, the characters are amazing (no annoying heroines and competent, handsome and lovable guys), the storyline is fantastic, it moves at a great pace, loose ends are tied up and they're remarkably happy.
I cry in these mangas. If the heroine is sad, I'm usually sad because they aren't whiny girls. Even if something dramatic lasts for only a page or two I'm usually pouring my eyes out like a bloody fool. It's that kind of story, you get used to the happy moments and suddenly the world is turned upside down.
But the characters are mature and handle things well, it's fantastic. I'm not just speaking of this story in particular, I'm speaking of all of Kako's works.
Read all of them, you'll revisit them again and again, but no matter how many times you read them that sensation you get when they kiss for the first time, confess for the first time, cry for the first time, have sex for the first time and when the ending comes will be like reading it for the first time.
It's brilliant, I love Kako and I can't wait for more mangas from her!