Synopsis
Disguising themselves as humans, homunculi inhabit the world to prey on the unsuspecting population. Created long ago by alchemists from Europe, homunculi are difficult to eliminate without weapons known as Kurogane. Each Kurogane is uniquely shaped according to its wielder's instincts, taking the form of special abilities called Busou Renkin. While walking home from school one day, Kazuki Mutou spots a defenseless girl under attack by a homunculus. But as he attempts to intervene, the girl end...
