Mission: Student Impossible

For the sake of a marriage agreement, Michael Stone, a slacker, returns to school as the P.E. teacher, awakening the "Teacher System". During an exam, he disguises himself as a student in a uniform and catches cheaters red-handed by tricking them into copying his false answers, then exposes those who had hidden phones by cleverly utilizing "Siri"—no rule-breaking behavior shall escape his sharp eyes and witty tricks.