Rebellious People Born in the 1990S

Cheng Zijing, Su Lingfeng, and Mo Xueling knew each other in middle school. When Zijing was in junior high school, she went to work after school in order to avenge the person she loved. Lingfeng, a classmate at school, was forced to work due to special circumstances at home. When she asked her classmates again, she met Zijing, who was in the next class. In the second grade of junior high school, Mo Xueling transferred to the school and changed their lives... What is the reason why their sisters turned against each other? What was the reason for their reconciliation?