 If you liked
Elfen Lied
|
 ...then you might like
Vampire Knight
|
Both are very dark series. They are about supernatural people who can kill people (diclonius and vampires). Still though, Vampire Knight is more romance like. Elfen Lief is more about killing people. Both series have flashbacks to the past. Plus, they contain a LOT of drama. They are both very enjoyable!