I should start by stating the obvious: the manga is so much better!! And they kinda butchered it in this OVA...
Story - 8
The story is very good. They set the premise pretty well, but it doesn't go anywhere from there. I assume they want to make a second one.
Art - 2
If we don't compare the art to the manga then it's pretty decent, but how can they have such a beautiful art in manga and transform it into... what they did in the anime? It was hard to watch.
Sound - 1
The worst voice actors ever. As for the soundtrack, nothing that got my attention.
Character - 6
They did the characters pretty ok, but I feel like their appearance was so off that I couldn't enjoy them anyway. You have your pathetic male main characters that gets too much sex for not doing anything special. But he is a good guy. And Emiru, a mysterious pervert who likes peeping on her neighbor, our hero. The OVA didn't get enough time to reveal the reasons behind Emiru actions but it showed us a lot of Emiru's faces which was nice.
Enjoyment - 1
I didn't. I'm sorry, I'm just too attached to the manga.