Total Recommendations: 2
If you liked
Blood Alone
|
...then you might like
Kure-nai
|
These both have the same core story: A young adult male caring for and protecting a younger female. The major difference is that Blood Alone has vampires, while Kure-nai has its own variety of supernatural powers, though they play less of a role in the plot than the vampires in Blood Alone.
If you liked
Shakugan no Shana
|
...then you might like
Hidan no Aria
|
The title characters as well as their male counterparts and the relationship between them are almost identical between the two managas. Both have an even focus on action and character/relationship/backstory/plot development. And it's all in high school, of course. The only real difference is Shakugan no Shana has fantastical elements, while Hidan no Aria is more grounded in reality.