It's about a horny teenage guy tricking his retarded sister into fucking him by telling her that she will get smarter by drinking his cum. It is so stupid but it for some reason worked for me, I enjoyed it quite a bit and have watched it multiple times, you'll probably find one episode you like the best out of the four available and stick to it. The prerequisite for enjoying this is of course that you enjoy incest since the whole story (if you can call it that) revolves around incest. I found it really hot, then again, I am the kind of fucked up guythat enjoys incest and actively seeks it out when looking for new hentai to watch so keep that in mind when reading all my reviews of hentai. I am pretty fucked up.

- I always give the sound of all hentai I review a 5/10 since I never really watch hentai with the sound turned up, I have always done this since I just dont really enjoy the sound in any hentai I have watched, sounds so fake to me, I prefer just reading the subtitles.