High School Mystery: Gakuen Nanafushigi

Mizuki Ichijo is a junior student at Kosen high school. Her grandmother was a medium and she experiences various psychic and mysterious phenomena which occur at the school: accidents, suicides, bullying, resentment, romance and more. She is befriended by the third year student Meiko Tsukikage, and together they attempt to solve the mysteries.

(Source: Wikipedia)