The first episode of Kuzo no Honkai passed the idea of a serious, complex romance. White Album 2 is a great romance that seems to have the same target audience in mind and is too directed by Andou Masaomi.
So if you like a romance with minimal comedy and a good plot, look no further.
Almost the same situation were it involves 2 people who have a crush on someone else but ends up being together. However, one has a side of comedy and the girl is quite a handful for the guy, while the other is more of a drama and the girl is very submissive to the guy's advances.
You are wondering what these anime have in common when they have different plots. while it is true that they differ in the story, they have some similarities. If you're a fan of :
- beautiful artwork
- melancholic instrumental music
- taboo love
- lots of erotic scenes
Then you'll probably like these anime. In Kuzu no Honkai the characters are developed better while Yosuga no Sora is by arcs. The Genres are different since one is a seinen and other is a (eroge) harem but nevertheless, they are both mature anime.