The literal meaning of Ai No kusabi is the space between. So it's about blonde people as the highest people with position in society, and their slaves (there's a huge space in there). Romance maybe because Iason, despite of his mean attitude, he's actually fall in love with Riki and doesn't want anyone to touch him. Idk maybe that's why, because that's what i understand( ̄∇ ̄")
yes, the older version is http://kissanime.ru/Anime/Ai-no-Kusabi why the newer version says (2012) next to it.
I just watched Ai no Kusabi and I'm so confused. Why was it labeled as romance? Didn't have anything to do with that at all. Also didn't get the end I guess. ╥﹏╥