Occult Maiden: Hi Shou - Oni wo Tsugu Shounen

A boy loses his parents in a supernatural disaster known as a "Curse" and is then adopted by the Tsuchimikado family; a family that exorcises curses. Ten years later and the boy has become the head of the family and now goes about exorcising curses all the while trying to balance his job as an exorcist and his life as a student in high school.

(Source: MU)