The fierce battle between the Women's Torture Research Institute and the Himekawa family continued. A new assassin appeared there. She is Akiyuki Kaya, who has mastered secret techniques as an advanced kunoichi. She confronts Tsujimaru, holding a terrible anger in her chest because her respected Yoshino Saionji was tortured. Kaya is gradually tormented to death. But she endures without ever letting out a word of submission. The outcome of the ultimate battle...