This is the newest VN by Ensemble, a subsidiary of Will which has previously specialized in 'ojousama-ge' (VNs where most or all the heroines - and sometimes the protagonist as well - are from a wealthy background).  This VN takes a slightly different tack than the company's previous games... probably because of the effects of the mediocrity that was Golden Marriage and the kusoge that was Koi no Aria (incidentally, they also split off another subsidiary that specializes in ojousama-nukige, lol). 

The protagonist of this VN is pretty capable, and this is generally visible from the beginning.  He is intelligent, physically excellent, and he is generally considered handsome by the girls of his school and the neighboring school, Shiraha.  Shiraha and the protagonist's school are merging as a result of the falling number of children, and that is an important element of the overall story.

One thing I found interesting about this VN is that it presents so many varying perspectives about the school merging while also pursuing the heroine paths.  Each heroine is not only a strong character in and of themselves, they also represent a demographic or point of view that has something to say about the merging.  As a side-note in a surprisingly good VN, I felt that the writer and scenario designer got his point across nicely.

This VN splits off really, really early... meaning most of the VN is made up of the heroine routes.  Unlike Koi no Aria, where content in general was cut and things felt truncated, this actually works out very well, giving the heroines plenty of character development and adding a lot of depth to their personal stories.  Of course, there are a lot of minor issues that take away somewhat from the VN's quality... the fact that Ensemble decided not to include voices for the majority of the non-main characters probably says a lot more about the game's budget constraints than I really wanted to know, seeing as they have, in the past, voiced most of the generic characters in their VNs.

Overall, this VN is a pretty solid charage with a very well-represented theme and deep character development.  I can honestly recommend this to someone looking for a new charage to play whose protagonist isn't a nameless loser.

Edit: Sorry this was a bit short, for all that I was praising it.  I'm in a lot of pain right now, so I honestly don't have the energy for a long post.  For those interested in the imouto, Ichika, her 'path' is basically a short 'ah, I just realized I loved you!  Let's have sex' path, so it is mostly for those who want some H-action with the adorable imouto.  Saori's path follows one of the ojousama patterns, and Hiyori's follows another.   In each case, there is enough variation and twists on the theme that they can be said to be distinctive, so don't worry that either path will be a rehash of the exact same pattern with a heroine from another VN.  Yukie is your 'ecchi oneesan' heroine... an archetype that is getting rarer and rarer these days.  Her path's drama is centered around the warped way in which they get close to one another, and more emphasis is placed on the school events than in the other paths.  Mio's path focuses on the complicated emotions that come up with the loss of her school (she's a Shiraha student), as well as the conflicts that are born of those feelings.  Akane's path is focused on club activities and is probably the most straightforward of all the paths (also the weakest of the main heroine paths).  As I said above, it was pretty interesting how they wove the VN as a whole together by using the heroine routes as perspectives on the same issue, with no heroine route giving the same precise perspective.