Rui, a female teacher who is loved by students and teachers, is a pervert who is always thinking about lewd things. At some point, she got into a condition where she would go crazy if she didn't masturbate every two hours. Every day, she rushes to the school bathroom to masturbate. The thrill had become an addiction. One day, her fellow teachers find out about this. The continuous creampie gangbang she had fantasized about becomes a reality...!