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Headmaster Korhonen has been the principal of his school for many years, and is finally fed up with the lack of discipline. It’s time to roll up the sleeves and put on a detention the like of which no one has seen before! The classroom looks ordinary enough, but Korhonen is no ordinary principal… The detention lasts for an hour, but there’s no thinking of advancing in classes before each and every one of the assignments has been finished correctly.
