HEZ-568 - Female sexual intercourse with insertion, lewd female teacher, obscene educator and a 35-year-old male student

Waiting for the 35-year-old male student were Kobayashi-sensei, a 49-year-old sex monster homeroom teacher, Mayumi-sensei, a 51-year-old health teacher who loves young men, and Hori-principal, a 55-year-old constantly sexually frustrated principal. And all they teach every day is practical sex education focused on insertion! One day, while receiving a fellatio lesson from Kobayashi-sensei as usual, Hori-principal and Mayumi-sensei appeared with demonic expressions…!?