Seven Mysteries

Seven Mysteries is a common trope in Japanese schools. The seven mysteries are stories of supernatural happenings in school.

Kamome Gakuen also has a set of 7 mysteries.

Out of all 7, Hanako is the 'boss'. He maintains balance in the relationship between supernaturals in the school and humans.

List of Mysteries

 * No.1 The Clock Keepers
 * No.2 The Misaki Stairs
 * No.3 Mirror Hell
 * No.4 ???
 * No.5 The 4PM Bookstacks
 * No.6 ???
 * No.7 Hanako-san of the Toilet