This drama is set in a high school third-year class that can get married without parental consent as "18-year-olds become adults". It depicts first love, pregnancy, marriage, and cheating, an unprecedented school cheating mystery. Cheating with classmates [High school students cheating], cheating with guardians [PTA cheating], and even the forbidden [teacher and student cheating]... Moreover, these intertwined thoughts are connected to a certain event.