 If you liked Black Bullet |  ...then you might like Tokyo Ghoul √A |
"Black Bullet" and "Tokyo Ghoul √A" are both super-powered action shounen anime series with the male protagonist being someone who tries too hard to do everything alone in order to protect those who he cares for around him. In their respective societies, there exists groups of powerful individuals who are discriminated against due to what they do as well as their origins. These two shows are also both straightforward in their dilemmas and uses backstory to add emotional impact to the lead characters.