Angel 'N' Devil.

A group of high school girls is Copper Dimension's last defense against the dark forces. They signed a contract with Xiong Ya, a guardian of light, to protect the innocent with their lives in exchange for having one wish come true. When one of their own is killed in school, their hunt for the devils in human skin brings them face to face with their own inner demon. They soon discover they are not above the influence of evil.