Stubborn Faith

Kurogane decided that he would now work part-time and not be a burden on his mother. One day, while discussing a case of a girl's kidnapping with his friends, they all go to the abducted girl's house to solve the case. However, Kurogane had to leave to tend to some important task, and when he gets home, he sees a girl there. Her mother tells him that she was a victim of the kidnapping and was found on the road, so they brought her home. Kurogane then begins to suspect if she is the same girl they were searching for?