With very high viewer ratings, it’s a bit of shock to see this show on the list. High School DxD follows the story of Issei Hyodo, a perverted high school kid who is killed on his very first date. But he gets reincarnated by Rias Gremory as a demon. Now, how come a show about angles and demons gets banned? Well, the premise of the show focuses on corrupt high school kids with a perverted mindset. This show is very sexual and shows a lot of nudity in certain scenes. This is why New Zealand has banned High School DxD for its sexual, harem themes based around high school kids.