This drama is set on the stage of a third-grade high school class where 18-year-olds become adults and can get married without parental consent. It depicts first love, pregnancy, marriage, and infidelity, and the unheard-of suspense of school infidelity.Cheating with classmates [high school student cheating], cheating with guardians [PTA cheating], and even forbidden [teacher and student cheating]... Moreover, this kind of intertwined thoughts is connected to a certain incident.