Based on the game by Guilty.

Minase Shizuru is the daughter of a rich politician. This being so, she attends a prestigious academy together with friends of a similar status. However, her life is turned upside down when she gets kidnapped by members of Tsuruma Consulting, who make her a sex slave for the test subjects in their research facility. Her good friends from academy are struck with the same fate. Together and with determination, they try to devise a way out of this small slice of hell.