Ai no Kusabi

The weak and the strong, the one who need to posses and the one who is being possessed this is the main theme of those two ova’s. To love and hate in the same time. Both of the anime are about the same thing, but from different perspectives. The graphic of fuyu no semi is better than the one from ai no kusabi [but that's related to the year of production]. I enjoyed both of them, so if u like on title give it a try with the other one too. 

Such a pity that Legend of Blue Wolves was never finished because of the low budget, but this one ova that was produced has a really good story. There are not too many good yaoi [when I say good yaoi I'm thinking at story too, not only the sex parts ]. 

Both are good watchable yaoi anime 

The aesthetic is diferent but in both shows the angst and tragedy are the focus. Both have homosexual relationships, on AnK there were more explicit and KtoKnU have more drama. If you are watching for great Boy´s Love Classics, these two are the option. 

Because it's a futuristic anime too. But the story of NO.6 is more engaging and it's not lemon, besides being exciting. (sorry bad english) Porque é um anime futurista também. Mas a história de NO.6 é mais envolvente e não é lemon, além de ser emocionante. 

The semes are both oppressive and possessive while the uke is whiny and full of resistance ( but not giving a good fight...in different ways). Although Ai no Kusabi is more about the societal/class influence and not as micro as Finder's take on yakuza, there are similarities in terms of the author's perspective on life (Life sucks for Fei Long all the way and same for Gai/Rikki), that it sucks, of course. Ai no Kusabi is a classic for yaoi. The 2012 remake version is slightly more parallel to the novel but the original animation is complete in its own way. See it to check it out. read more 

Ai no Kusabi and Buko No Sexual Harrasment are much alike they both have a lot of lemon (sexual ralacion ships hardcore) and they have love ralacion ships in really sick a disturb ways.  

Both are very serious, dramatic yaoi anime with a developed plot, strong passions and a deep conflict between main characters who are in love but cannot reconcile their differences. 

Even though they are set in different times and their characters have a different relationship, Ai no Kusabi and Zetsuai/Bronze are really alike. Both are old school and their artwork is gorgeous; all sex scenes are tasteful (not really explicit, and not vulgar) and both revolve about one person's obsession and desire to posses someone else. The relationship between the characters is deeper, more tortured and complicated than in any other yaoi anime I've seen .They are both 10/10 in my list! 

Ai no Kusabi shares with Armitage series the atmospere of good rough cyberpunk. Maybe it's even more similar to Armitage Polymatrix. However the only Dual-Matrix is of the same director as Ai no Kusabi.