School of Youth: The Corruption of Morals 2014

Troublemakers Mok-won, Ryu and Hak-moon are far from passing the state examinations. Three female students enter the school during a new spring term and the atmosphere changes. Then one day, Mok-won and Ryu are taken to around the back of the school and molested by an unknown woman.
The three of them start an investigation.
They start suspecting the three female students and start searching for the real criminal…