They have been responsible for killing humans in the last one thousand years since the war began. Basically Kegare are residents of another world called Magano which then cross into human world in order to massacre humans just for power. The story revolves in a world where exorcists fight demon-like creature called as 'impurities' or 'kegare'. This 4th work from manga author Yoshiaki Sukeno has emerged to be quite phenomenal in its unique traits. At first I thought this was only a mere exorcism story that was only about fight, friendship, and stuff which are rather crap nowadays but it's nothing like that.
