I will write my impression not thinking about the author since it's not like I'm a fan, there is a plot, well not like a super awesome one, but Itsuki and Miharu do grow feelings and stuff... I can even say it's quite romantic as it goes by, and man I've read tooooooons of yuri manga, so please read the entirety of the work...
The girls who kinda grew together have a regular yuri manga reason to do it,they are childhood friends :P
Sara and the teacher..well..random a bit,Sara didn't get who she wanted ,but the teacher seems to suit her best
Miharu was clueless and then she got the hots for this slightly older girl,who was,in my opinion, more shaken up by this,even if she started,cos she got involved against her will( emotionally ) and they are lovely together <3 <3
The glasses girl..erm...wtf? haha
Entertaining and kinda cute!!! I liked it a lot