Big Slaughter Club - The Final Massacre (2004)

Misato, a schoolgirl, wanted to stop her friend Kaori from getting involved with a gang of delinquents who dealt in magic mushrooms and other illicit activities. Misato found herself on the verge of being raped by the gang in a mansion, but just then, Takezō appeared. Takezō proceeded to kill the gang members one by one.