Violence Jack: Harem Bomber

A massive earthquake has destroyed the Kanto metropolitan area. In the aftermath, a criminal known as Slum King captures women and forces them into prostitution. Mari is searching for her boyfriend, Ken, when she is captured and subjected to abuse and conditioning as a sex slave. Ken, who has joined Slum King's organization, rescues her. In exchange for Mari's freedom, Slum King demands that Ken kill a target named Violence Jack.