Azaghal666, a bespectacled, brown-eyed student, is tutored in more ways than one by his Asian teacher, Moises666. In the dimly lit Mexican bedroom, the teacher's patience wears thin as Azaghal666's comprehension of trigonometry lags. But as they work through the problems, their hands touch, and the air grows thick with desire. Moises666's voice catches as she guides Azaghal666 through the curves of a cosine function, her hand tracing the line on his back, leading them both down a path of taboo pleasure.