My personal feel after this anime was: What did I just watch!?
Sure, the art is quite good, same as the story line, which is as good as it can be in just 1 episode, but seriously, if you can't stand brother-sister relationships with no limit at all, you will find this anime shocking...
Also, it comes quite close to hentai, it is extremely "detailed".
Anyway, if you're planning to watch this OVA, prepare!