M no Joou-sama

Takeshi Saito lives a mundane and unremarkable high school life until his classmates hand him an S&M photobook and an adult video. Soon after, the dignified and strict student council executive director, Itsuki Minagawa—known as the school's 'Queen'—summons him. She fixes him with a glare, and he expects a scolding. But what she says instead is utterly insane: 'Become my master.' Itsuki, it turns out, is a self-proclaimed masochist who has chosen to train Takeshi as her own master to fulfill her desires.