Phantom World is probably the clearest example of what the otaku fanbase has done to anime. It's an anime with a relatively novel concept and a great way of explaining it, but falls prey to having to adhere to classic "ecchi" tropes and situations. The series takes place in a world where a virus infects the entire human race, fundamentally altering our brainwaves to allow us to view the supernatural inhabitants that share the world with us. These inhabitants, called Phantoms, can be anything from cute mini-sized fairies to giant, malevolent demons. Humans try their best to live in harmony with the Phantoms, but when that's impossible, intervention is required. Enter our main characters, part of a school club that deals with sealing phantoms. Haruhiko, a young boy with the ability to seal phantoms after sketching them, whose intellect offers Intel on the various Phantoms they encounter. Also, his friend Ruru, a Phantom herself who happens to be a little pixie g