Uniform Virgin Pain (1981)

Two sheltered high-schoolers, Mari and Emi, slip into a neon-lit club in the city's seedy underbelly. As Mari loses herself in the pounding music, two men zero in on Emi, cornering her and assaulting her. The following day, those same men attempt to coerce Emi into a life of prostitution. When Mari learns the horrifying truth of what her best friend endured, a cold fury ignites within her—and she quietly pockets a razor, ready to unleash her vengeance.