 If you liked
Shakugan no Shana
|
 ...then you might like
Erementar Gerad
|
Both of these shows feel pretty similar, what with their action scenes, similar themes/tones and their plots have a bit in common as well. A high-school age battle couple that has to overcome the fact that one (or both, in SnS) aren't humans, everyone wants to kidnap one of the main characters, and both tend to have a bit of humor from the awkward sexual tension.