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Rei, a married woman who teaches at the same school as her husband. One day, Rei receives a report from her husband that Machida, the class that Rei teaches, doesn't seem to be feeling well. The next day, her husband witnesses Yamaguchi, a student, bullying Machida. At that time, when her husband violently protected Machida, Yamaguchi was injured. After school, Rei calls Yamaguchi and Machida and tries to ask them about the situation, but Yamaguchi uses the fact that he was injured as a cover and threatens to tell the school board. And if she doesn't like that, she orders her to show her breasts...