Ghost Hunt S01E17 - FILE 6: Forbidden Pastime #4

Naru and Lin begin a ritual to return the curse to its casters, thereby leaving the curse's target unharmed. Mai learns that this ritual will affect most of the school's student population, as they, while unknowingly, contributed to the curse. Her attempt to stop it by using the Buddhist Mantras, taught by Takigawa, fails, but Naru and Lin are able to lift the curse with little harm to the students.