During the day, she performs her duties as a teacher, and after school, she secretly meets with her students. Reiko enjoys immoral acts that are unbecoming of a teacher. However, recently, her students have begun to ask for more excitement and to have a relationship on school grounds. Reiko warns them that this is dangerous, but the hot-blooded young man is not willing to listen... It's a dangerous school affair that will end everything if he is seen. Even though Reiko refuses, she feels the thrill and sense of immorality.