How did we...

Kim Bo-kyung (Female Lead): 16, 3rd grade, X Middle School Nam Do-hyun (Male Lead): 16, 3rd grade, X Middle School Kim Yo-han (Female Lead's older brother): 18, 2nd grade, X High School Song Hyeong-jun (Male Lead's friend): 16, 3rd grade, X Middle School Kang Min-hee (Male Lead's friend): 16, 3rd grade, X Middle School Cha Jun-ho (Transfer student, male lead's friend): 16, 3rd grade, X Middle School Jenny (A fox who claims to be the female lead's friend, but tries to turn her into a bad girl): 1