"Beatrice" is an enigmatic force that obeys human desire and brings it to fruition. Tokyo Beatrice University Attached High School is the sole institution that offers instruction in Beatrice, a discipline described as "real‑world magic."
Yoshimura Mamoru, a senior high school student, was rescued by Beatrice when he was a child. On his first day at the new school, he encounters a girl beneath the cherry blossoms as he walks to class. She invites him to accompany her.
Her name is Takasu Ayako. She is a second‑year, one year older than him, and serves as the director of the student discipline committee. She is also the granddaughter of a prominent politician, exceptionally beautiful, and an extraordinary Beatrician capable of even downing a satellite. Though she is known in Beatrice circles as Witch Beatrice or Death Angel, she remains a genuinely kind soul.