Tsubasa, who was assigned as a new teacher to a boys' school famous for its bad behavior and worked hard to interact with the students, falls in love with a serious student, which is rare at the school. However, a delinquent student witnesses the two of them making love in the gym storage room... The next day, a student who is a delinquent leader blackmails Tsubasa with secretly taken photos of him, and Tsubasa chooses to teach the class naked to protect the boy she loves. As she is forced to perform obscene and humiliating sexual acts, she becomes addicted to the pleasure of shame.