Nozoki Ana/A Peephole is one of those things that you come to because you're horny then stay because you fell in love with the story. In my case, that's my exact experience. Nozoki Ana doesn't have a complicated plot, yet it's not like the other ecchi - it has a nuanced story that had me depressed for days after finishing it, I cried at the sad scenes, I smiled at the cute scenes, then the end had me laughing with joy, and then emptiness. The story of Tatsuhiko Kido and his weird neighbour Ikuno Emiru is, at first glance, bland, but as you go on you start to feel more and more that these two relate well making their ending sensical.
As you could probably tell: I love Nozoki Ana and I would recommend anyone and everyone to read it, but personally I wouldn't reread it because the flow of emotions I went through with this story ruined me.