Sousei no Onmyouji

Rokuro Enmado is a young boy who used to be a powerful aspiring exorcist, before a tragic incident left his friend dead and made him abandon the profession. One day, he has a fateful encounter with Benio Adashino, a girl around his age and a well known exorcist from the east. According to prophecy, Rokuro and Benio are the "Twin Star Exorcists", and are destined to marry and have a child which will be the ultimate exorcist, capable of cleansing all evil spirits, or Kegare, from the world. <br> When Rokuro's best friend Ryogo goes missing, Rokuro is forced to ask Benio for help to enter Magano, the realm of the evil Kegare, to rescue him!<br> <br> (Source: Wikipedia)