Yuri is a married woman who works as a teacher at the same school as her husband. She is a strict but kind teacher, and is loved by many students. However, one delinquent student, Yano, always takes a rebellious attitude towards Yuri. When Yano cheats on a test, Yuri responds with firmness and scolds him, slapping him after a back and forth argument. When Yano is scolded and found out about his cheating in front of the other students, he begins to hold a grudge against Yuri, and hatches a plan to use the female students to frame Yuri...