I thought the character design looked familiar. Sure enough, the author, Takako Shimura, also did Hourou Musuko, another manga that deals with school-aged kids dealing with their blooming sexuality in a sensitive, tasteful way. I keep waiting for more chapters of both mangas to be scanlated. Go, Kotonoha, Lililicious!
I found all the characters delicious so far. Each one of them has their own history and issues to work through. All different sorts of sexual identities are beginning to be explored (we're talking about feelings here... though it says "yuri" there, it's not that kind of manga. Shoujo-ai might be a fairer description). It really is a very sweet romance manga with an added layer of confusion for the characters. And just like in Hourou Musuko, I find myself rooting for all the characters at the same time, they're all so charming!
On a side note, I really have to disagree with Anonymous back there... a shallow slut? For meeting a girl, then a while later going on a date, then a while later sharing a kiss? Huh? That was a rather harsh, uncalled for judgement, and a totally inaccurate one as it turns out when you read the chapters that were released after that comment was posted. In other words, don't let that comment sway you, give this cute, touching manga a shot!