Mazekien Schmidt, Head Girl and top student of Rosemary High, is at the peak of her academic career... until she finds a note in her locker reading "I wish you were dead." Spooked but determined, she throws herself into planning the Senior Party with her best friend. But the night unravels into disaster when she catches her boyfriend cheating on her... with her best friend. The betrayal sends Mazekien into a spiral of despair, forcing her to confront long-buried secrets about her past and identity. Meanwhile, Nami, a newcomer to Rosemary High and silver medallist in the prestigious Kami Cup, is eager to leave her troubled past behind. But after an unsettling encounter in the school dojo, she discovers the true nature of a powerful and dangerous entity: a Mage capable of possession, hypnosis, and uncovering the darkest truths of their victims. Nami knows she must act before her fresh start is destroyed. With vastly different personalities and painful pasts, Mazekien and Nami are drawn together by a common enemy. But can they overcome their differences to stop the Mage before their lives are ruined?