As the dominant force within the school, teacher Ryoko (Sato) systematically turns male students, female students, and even the principal into her sex slaves, expanding her web of control. Her next targets are Miho (Hasegawa), a shy girl from Rota Girls' Academy who has been relentlessly bullied by compensated dating girls Ayumi (Nakajima) and Kaoru (Yamamoto). Ryoko's assault on Miho goes far beyond mere sexual domination, unfolding in increasingly deep and cruel ways.