Minase Shizuru is the daughter of a well-to-do politician. This being so, she attends the prestigious Seinanjo academy, together with friends of a similar status. However, her life is turned upside down when she is tricked and taken hostage by members of the Tsuruma Cooperation, who locks her up and make her a sex slave for the test subjects in a research facility. Unfortunately, her good friends quickly follow suit as they reunite with Shizuru, while being in the same situation. Together, they try to devise a way out of this small slice of hell.
