KAMUI: He's Behind You

うしろの正面カムイさん

Shizuka is a normal high school girl with the ability to see ghosts. Due to her peculiar tendency to attract ghosts, she works as an assistant to Kamui, a famous psychic. Kamui takes pride in his top-notch psychic abilities, but the way he exorcises ghosts is rather unusual!(Source: Shogakukan, translated)