The shadowy organization "Pleasure Torture Research Institute" aims to drive women to the limits of pleasure and turn them into their own possessions. True to its name, it constantly blurs the line between training and pleasure, employing methods designed to destabilize a woman's mind. This time, their target is Aki Kashiwagi, a married woman working as an insurance sales agent. Unaware of the dangers hidden in her daily life, she gradually falls into their trap. As the process unfolds, her mind and body become increasingly distorted, awakening to new forms of pleasure. A mysterious and dangerous world unfolds here.