Uniform Virgin Pain by Mamoru Watanabe

3.57

After school two virginal high school girls, Mari and Emi, decide to visit a disco club in the red light district. While Mari is dancing to the beat Emi is picked up by two men and sexually assaulted. The next day the two men try to force Emi into prostitution. When Mari finds out what happened to her best friend she burns with revenge… and conceals a razor.