School Zone

School Zone (スクールゾーン, Sukuuru Zoon) is a manga series by Kanako Inuki.

Plot
There exist thirteen ghost stories about the school and, it is said, a terrible fate is reserved for those unlucky ones who learn all thirteen. One afternoon, one student tells the others the one about the human head found in the school elevator. Soon after, many students begin to experience strange and terrible encounters with the supernatural, and coming to school now becomes a struggle for survival.