If the anime was never completed, Then you're in luck. You can continue the story by reading the completed manga. This list has basically the same rules as a couple of my other ones, includes anime originally based on a manga, no...
***Note: Spoilers may be present in reasons why an anime is on this list.*** Canon = There is an actual relationship between characters. Coded # = There is an implied relationship between characters hidden in subtext/coding with...