Cool de M na Kaichou to Kageki na Ama Icha Kozukuri Gakuen Seikatsu

Synopsis

The perfect chairwoman that everyone adores turns out to be a total masochist. Go ahead and enjoy your sweety flirty and super stimulating academy sexlife with her! Anytime, anyplace, your M slave & lover will serve you, her master! She's begging for it!!

Nagisa is a childhood friend of yours, slightly older than you. She works as the academy chairwoman and you have had feelings for you for a long time. But due to her overall excellence as a person, and a beautiful babe, you feel distance...

However, you are called to her birthday and there she gives you a confession. A confession of love. A confession that she is masochist. A confession that she wants to be your sex slave!