Shin Shirayuki-hime Densetsu Pretear

A high school student named Himeno Awayuki struggles to adapt after her father remarried a wealthy woman named Natuse, who is unsympathetic toward Himeno. Her stepmother's two daughters also dislike her. While taking a shortcut to school, Himeno encounters a boy who leads her to a dying magical realm. This world requires the aid of a mystical princess known as the Pretear, a role that Himeno is revealed to fulfill.