Aki-Sora: In a Dream · review
It's about a bunch of messed-up teenagers doing messed up things. I actually kind of felt bad for the MC's twin sister, which in my book makes her one of the best written characters in all of the porn that I ever watched. This show understands that the pleasure in sex is not only derived from the bare motions but also the emotions that the characters feel. In a way, the plot manages to eliminate the repulsiveness that tends to emerge from incest because the characters feel like actual adolescents not knowing how to handle their feelings; they feel like people. This is not the typicalweeb-ish "onii-chan" type of deal; this anime is so degenerate that it circles back to being tasteful again by being brutally honest and real with its approach to incestious sex and relationships between teenagers.
Due to its nature, this anime is not everyone's cup of tea, but I can recommend it to any hentai enjoyer who's only lightly-to-averagely disgusted by incest and teenage sex.