Cursed Book of the Dead

"I will use your blood to sacrifice my undead souls who cannot rest in peace. When the spell of rebirth reappears, my resentment will be resurrected to seize your betrayed soul..." After an ordinary female high school student obtained the "Curse of the Book of the Dead", she was inexplicably involved in a series of suspenseful events. Is all this a coincidence, or is there someone behind it?