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Maki, who serves as the head teacher for the school year, is a capable teacher who has an image of being pure and clean at school. However, while fulfilling her duties, she secretly has an affair with a fellow teacher to relieve stress. One day, a problem occurs in which the beauty of the school is being damaged... It turns out that the janitor has been slacking off on cleaning. Upon investigation, the janitor, Shiraishi, turns out to be a terrible man who is regularly late and absent from school, does sloppy work, and drinks alcohol on school grounds. Maki gets angry and scolds him, but ends up earning his resentment...