The Metamorphosis (2017)

Original title: 学姐是大佬

When a second-in-a-second schoolboy student, was transferred to Shichuan in the north of the Yangtze River. He was not hopeful for his life. He unexpectedly discovered that the female college student on campus was the elder sister Anna who had once loved him and wanted to be in the other school. She was brave and strong in her outer struggles. At the same time, his changes also touched various 'bad students', including Anna, to reexamine life and spend a rebellious yet bloody adolescence.