Whispering Corridors 6 :The Humming

Eun-hee, who has no memory of her high school years, starts experiencing eerie visions and voices after returning to her alma mater as vice principal. Meanwhile, Ha-young, wrongly labeled a troublemaker, hears ghostly sounds in a sealed bathroom and meets Eun-hee there. As strange events unfold, the two uncover a terrifying secret tied to the school's past.