Basiccally this story is about how everyone in the generation above the main character's engaged in adultery and the main character trying to figure out who he can be with without it being incest...
It's a shame, because the plot seemed to be good until the whole thing about everyone cheating and being related and not being able to be married and being forced into eating aphrodisiacs and all that came up. I guess if you're into that kind of drama then this is for you.