Shoukoujo The Animation goes all the way with the sister fucking. The little cuties are horny and ripe, ready to explore the pleasures of sex with their elder brothers and tutors. The dialogue keeps drilling the word "onii-chan" with confidence, expecting it to resonate in your dark otaku soul. The stories are simple, mostly just straight-to-the-point sex with the optimal minimum of foreplay.
If you´re interested in exploring depraved fetishes that almost every society in the world despises, Shoukoujo The Animation is a safe first step. Just don´t tell anybody about it, because it's imperative we keep pretending to be more than just pigs in human clothing.
Many anime and hentai studios have come to realize the market potential in catering to lonely single sons. Yes, it is most probable that the bulk of the audience for incest porn are from single child families. I say this because I have siblings, and while having them around is great, there's only two roles they can take: siblings are either really good friends or fighting buddies. You don´t develop sexual feelings for family members, it just doesn´t happen.
