Prétear: The New Legend of Snow White(2000)

Shin Shirayuki-hime Densetsu Pretear

Himeno Awayuki is a high school student who's having trouble adjusting to her new lifestyle. Her mother past away when she was a child, and her father Kaoru married the richest woman in town, Natuse. Kaoru always seems to take Natuse's side, and Natuse's two daughters aren't too fond of Himeno. Himeno's new life changes when she takes a shortcut to school and runs into a young boy, who takes her to a magical world on the brink of extinction. This world needs the help of a magical princess called the Pretear, who happens to be Himeno herself.