Ushiro no Shoumen Kamui-san

This exorcism is OMFFFFFFFFF!!!! Shizuka is a self-proclaimed ordinary high school girl who "only" sees ghosts. Using her unique ability to attract spirits, she works as an assistant to the famous psychic, Kamui. Though Kamui boasts overwhelming spiritual power, his exorcism methods are unprecedented...?! Will Shizuka, tossed about by supernatural disturbances, ever find peace? The curtain rises on "supreme" exorcism!! OMFFFFFFFFFG ALMIGHTY!!

(Source: OceanVeil)