Sugiura, the president of a finance company, becomes intensely interested in his beautiful employee Rinka Juki and obsessively pursues her, demanding she become his. But she firmly rejects him. Enraged by her defiance, Sugiura hires Kurusawa—an underground contractor known for turning women into obedient slaves—and commissions him to break her. Thus begins a flawless, merciless training regimen designed to crush even the strongest will, transforming her into a complete sex slave.