Nope, never read it. I have seen the OVA though and didn't find it all that great, not to mention it cuts off before any real conclusion and shows you characters you've never heard of at the very end. I assume more than anything it was just a treat for people who have read the comic. I must say, however, the animation is very pretty.

I have no intention of ever reading the comic either, because personally, three animated episodes was more than enough overtly romantic brother/sister incest for my taste, thank you.