Kibatsu Senki
Saga of the Demon Banisher·鬼祓戦記
Kotaro, a member of a lineage of demon exorcists, seeks to eliminate a "Demon Mask" that has taken control of his childhood friend, Asuka. These masks are described as malevolent entities that reside in the darkness of human emotions. As he confronts the mask, he discovers that Asuka's strength is greater than he anticipated.