Emiri-sensei, the private tutor, is known for her bold sex education style—arriving at her assignment and immediately mounting the boys, having sex with them right away. She confronts teenage boys' uncontrollable sexual desires head-on, guiding them with a mix of scolding and rewards. Whether a student is quick to learn or slow, she treats them all equally, stimulating and satisfying their desires. The term "riding intercourse lesson" emphasizes the erotic atmosphere of her classes, making it a major highlight. Beautiful and seductive, Emiri-sensei captivates the boys' hearts, enjoying each day as she turns sex education into pleasure.