Ore no Imouto ga Konnani Kawaii Wake ga Nai, Oniichan no Koto nanka Zenzen Suki ja Nai n da kara ne!! Recommendations
Two anime with prospectively the most epic titles are all about incest.
OreImo is about a younger sister and her friends trying to get into an older brother's pants, or at least that what we wish to see in the show.
Non-OreImo which I don't know the official abbreviation of its title is written by former erotic manga writer. Story isn't its strongest suit, unique art direction in manga is non-existent in anime but you are still suggested to watch this if you loved OreImo. They both linked together by incest.
Well Lets see.. They both have that "incest" Vibe to it. Although, I do think that OreImo Has a more sensible relationship between the siblings and actually has some sort of story. Onii-Chan no Koto goes abit overboard with the whole Incest thing. Also, it's animation is abit... Strange? OreImo Revolves around the relationship of the brother and sister and the whole otaku culture. Where as Onii-Chan no Koto revolves around more sexual jokes, stronger incest content and this strange harem. Personally, I enjoyed OreImo more than Onii-Chan no Koto, But im sure if you liked one, you may enjoy the other.
Both have REALLY long titles
Both have potential incestuous relationship between brother and sister
Both deal with "sibiling" relationships, and trust me both are really good!!
Both are anime about a little girl who wants to have sex with her older brother.
About younger sisters for a start... Harem, brothers who have a friend that are fujoshi, not dubbed yet, and hilarious.