Kanosen: My Girlfriend is a Naughty TeacherKanosen: My Girlfriend is a Naughty Teacher

Hatori Yuu has a problem: his sex drive is so ridiculously strong it's disrupting his day to day life.

If he doesn't jack off at least three times a day he gets so horny he can't concentrate on anything else. His half-hearted responses in class and general inattention haven't gone unnoticed, either, and his teacher, Takehaya Kaori, has scolded him on a number of occasions.

Yuu, however, has fallen head over heels for the kind and beautiful Kaori-sensei. Thanks to his raging libido, that means that just looking at her puts him at full mast in an instant. He can only make so many excuses and run away so many times before Kaori-sensei finally gets suspicious and calls him out after school.

Alone with Kaori-sensei in the quiet, empty student counseling room. As Yuu's heart pounds its way out of his chest, she asks if he's being bullied—but of course, he could never admit that his real problem revolves around the lust for her that burns away within him.

Kaori-sensei takes his hand and tearfully explains that she just wants him to enjoy his school life, that she'd do anything to help him. Her damp eyes, her sweet fragrance, her sizable bust pressed against his knees, and her hand, gripping his... It's the first time Yuu's felt that much bodily contact and it overwhelms him. He comes. Hard.

As the stain spreads out across his crotch and the embarrassment takes hold, Yuu throws caution to the wind and asks Kaori-sensei to help him masturbate—and astonishingly enough, she agrees. And so begins their secretive school affair...