Kamui the One Standing Behind You

Kamui the One Standing Behind You manga, うしろの正面カムイさん Ushiro no Shoumen Kamui-san 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!