The series follows the timid and unassuming art student, Saki, who finds herself ensnared by the cruel and beautiful student council president, Ai, and her equally sadistic vice president, Miki. Saki's initial admiration quickly turns to terror as she becomes the personal plaything for their depraved sexual games. Stripped of her will, she is subjected to a relentless series of humiliations, from being forced into degrading cosplay and public exhibitionism to enduring intense bondage and non-consensual acts. Ai and Miki take immense pleasure in her psychological torment, systematically breaking her down with their dominant and manipulative tactics. Each episode escalates the sadism, exploring the dark depths of their desires as they push Saki's body and mind to the absolute limit, forcing her to participate in threesomes and other extreme scenarios designed purely for their arousal and her complete subjugation.