The video features Professor Zhang Xus, who is working on his latest work on 2022 Calculus A2 Volume B1 with a young student. He starts off by showing the girl how to properly calculate and then proceeds to engage in some steamy sexual activity with her. She moans and writhes as she expertly works through each problem, using her fingers to bring herself to orgasm. As they engage in more intense activities, the teacher switches things up and begins to explore her own body, using various toys to stimulate her mind and bring her to the brink of orgasm.
