This is an ecchi anime so you have to make a review corresponding to the genre... I have seen many reviews of anime of this style that complain about "Fanservice" which seems kind of silly to me... For example, a person does not watch a hentai anime expecting there to be no "hentai".
Putting all that aside, this is what I think of this anime:
Well the anime is not the best piece of art but it is very entertaining and fun.The story is something out of the ordinary since in ecchi anime one usually sees how the plot focuses on the male protagonist. In this story Yamada the female protagonist takes the initiative and She is the "pervert" so to speak, The anime is not pure fanservice, it has a lot of romance and comedy. As the chapters go by we will be able to see how Yamada matures and realizes that it is not all "sex" in life! I recommend it!