I love this series. I don't really know what pure yuri is supposed to be, but I really enjoy watching their relationship develop. Deals with a lot of real life issues for high school couples. Not too dramatic or boring, just accurate and refteshing to read.
There is some relationship drama but it's believable and not overbearing like some other series.
For the love of god pick a goddamn incident to have drama over and stick with, this is like the Power Rangers of drama! Every week there's a new drama villain to fight!
I would rather have a long drawn out arc where there's constant drama that has to be resolved than "Hey there's drama!" two chapters later "Now it's gone!"