Angel 'N' Devil(2014)

Angel 'N' Devil is a supernatural series following a group of high school girls who serve as Copper Dimension's final defense against dark forces. Bound by contract to the light guardian Xiong Ya, they've pledged to protect the innocent in exchange for one wish granted to each. When a classmate is murdered at school, the girls hunt for devils disguised as humans, only to confront their own capacity for evil. As the investigation deepens, they realize their moral boundaries are far more fragile than they believed, forcing them to question whether they can truly resist corruption.