This is quite an interesting h manga, which involves 2 couples, 1 being a main one.
I could somehow see the concept being taken from a romance series, after which it was infused with lots of H scenes. Not much content actually, the story isn't that exciting but at least it fares much better than those H manga which only have 1 main genre:H.
This series has 2 or 3 main genres, like romance and friendship.
The setback though is that the H scenes were usually too packed together, and not really that interesting. Enjoyment rate is ok, but what is valuable is that it's interesting.
The ending parts
is especially good, as they were rather conclusive and kinda touching. It ended well. :)