A fanlisting is a place for all fans of a particular show, movie, actor/actress, singer, etc. to come together and build the biggest listing of people from all around the world who are fans of that subject.
This particular fanlisting comprises of the two separate listings for fans of the anime series "Gakuen Utopia Manabi Straight!" and for fans of the music from the series. If you're one of them, feel free to join the listing you like! Or both of them, of course!