The more seriously and devoted the female teacher was with her students, the more she felt betrayed, and the more helpless she felt that she could not do anything about it. Pressure from school. A single woman who is so busy with work that she has no time to find a man. Searching for an outlet for her stress, she ends up at an SM salon for women only. A place where she can release her unfulfilled sexual desires and reveal her true self, the female teacher becomes addicted to immoral and perverted acts. An after-school secret class where an intelligent female teacher falls apart.