In line with the game by Kiss.

Arisugawa Academy. A great-girl school recognized because of its high standards together with the upper class. However, you will find there's bad side for this educational facility. The Chairman of the academy, Takahashi Hiroaki, is actually a an affiliate a secret organization whose prime objective is to appeal to the sexual desires of government officials. Mutsuki Sayoko has fallen in the hands of this sinister being, who leads her on the road to libido. A high-class, well-behaved student or a horny, wicked sex slave... which is true her?